Learn how to use the ESP32 Microcontroller and MicroPython programming in your future projects! The project book, written by well-known Elektor author Dogan Ibrahim, holds many software- and hardware-based projects especially developed for the MakePython ESP32 Development Kit. The kit comes with several LEDs, sensors, and actuators. The kit will help you acquire the basic knowledge to create IoT projects. The book’s fully evaluated projects feature all the supplied components. Each project includes a block diagram, a circuit diagram, a full program listing, and a complete program description. Included in the kit 1x MakePython ESP32 development board with color LCD 1x Ultrasonic ranging module 1x Temperature and humidity sensor 1x Buzzer module 1x DS18B20 module 1x Infrared module 1x Potentiometer 1x WS2812 module 1x Sound sensor 1x Vibration sensor 1x Photosensitive resistance module 1x Pulse sensor 1x Servo motor 1x USB cable 2x Button 2x Breadboard 45x Jumper wire 10x Resistor 330R 10x LED (Red) 10x LED (Green) 1x Project book (206 pages) 46 Projects in the Book LED Projects Blinking LED Flashing SOS Blinking LED – using a timer Alternately flashing LEDs Button control Changing the LED flashing rate using pushbutton interrupts Chasing-LEDs Binary-counting LEDs Christmas lights (random-flashing 8 LEDs) Electronic dice Lucky day of the week Pulsewidth Modulation (PWM) Projects Generate a 1000-Hz PWM waveform with 50% duty cycle LED brightness control Measuring the frequency and duty cycle of a PWM waveform Melody maker Simple electronic organ Servo motor control Servo motor DS18B20 thermometer Analog To Digital Converter (ADC) Projects Voltmeter Plotting the analog input voltage ESP32 internal temperature sensor Ohmmeter Photosensitive resistance module Digital To Analog Converter (DAC) Projects Generating fixed voltages Generating a sawtooth-wave signal Generating a triangular-wave signal Arbitrary periodic waveform Generating a sinewave signal Generating accurate sinewave signal using timer interrupts Using The OLED Display Seconds counter Event counter DS18B20 OLED based digital thermometer ON-OFF temperature controller Measuring the temperature and humidity Ultrasonic distance measurement Height of a person (stadiometer) Heart rate (pulse) measurement Other Sensors Supplied with the Kit Theft alarm Sound-activated light Infrared obstacle avoidance with buzzer WS2812 RGB LED ring Timestamping temperature and humidity readings Network Programming Wi-Fi scanner Remote control from the Internet browser (using a smartphone or PC) – Web Server Storing temperature and humidity data in the Cloud Low-Power Operation Using a timer to wake up the processor

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LCR/ESR Meter, Multimeter, SMD Tester with built-in Micro Signal Generator The Miniware DT71 digital tweezers are a truly 'smart' buy for pro engineers and makers alike. The compact DT71 has a unique trinary structure which can be separated into the controller, testing arms, and tweezer tips. You can use the DT71 to take measurements and to automatically identify SMD components such as resistors, capacitors, and diodes. Highlights DT71 Mini Digital Tweezers is a tool for multi-function measurements with full differential input measurement. DT71 has a unique trinary structure, which can be separated into the controller, testing arms, and tweezer tips, flexible to be replaced and combined. It is compact and pocket-size for easy carrying. You can use it in laboratories, workbenches, warehouses, and in the field. It also has dual built-in rechargeable lithium batteries that can last 10 hours at a stretch with a single full charge that takes about 2 hours to charge. DT71 Mini Digital Tweezers have an OLED screen on the 360° rotatable controller, providing visibility at all angles. Smart gesture recognition will automatically identify left/right-hand operation and adjust screen display. It has various measurement types to fulfill all your needs. The test arms of DT71 Mini Digital Tweezers use magnetic elasticity to provide an easy clipping, ergonomic, and long-lasting structure. DT71 Mini Digital Tweezers features a pair of beautiful intensified gold-plated interchangeable tweezer tips, which enables higher measuring accuracy. DT71 Mini Digital Tweezers have manual and automatic Identification modes. In auto mode, DT71 can automatically identify SMDs including resistor, capacitor, inductor, and diode, showing both main and secondary parameters, very useful in fast distinguishing different components. Meanwhile, a built-in miniature waveform signal generator can output a variety of waveform signals. DT71 provides a perfect solution for debugging and maintenance of complex electronic systems and the classification and detection of discrete chip components. Different from other LCR testers, DT71 Mini Digital Tweezers have no physical buttons, instead, it has a hidden touch button on top of the controller, which makes it easy to operate with only a light touch. DT71 Mini Digital Tweezers has intelligent functions such as Automatic identification, Automatic shutdown, and also the firmware can be upgraded. Features Innovative trinary structure: separated into the controller, testing arms, and tweezer tips, which are flexible to be replaced and combined. 360° rotatable controller with OLED screen, with good viewing angles. Smart gesture recognition with automatic identification of left/right-hand operation and adjusting the screen orientation accordingly. Hidden touch button on top of the controller, which makes it easy to operate with only a light touch. Test arms use magnetic elasticity to provide an easy clipping, ergonomic, and long-lasting structure. Built-in dual lithium batteries in test arms, balancing both arms and providing a longer standby time. Several kinds of gold-plated interchangeable tweezer tips, enabling higher measurement accuracy in various usages. Automatically identify SMDs including resistor, capacitor, inductor, and diode, showing both main and secondary parameters. A built-in signal generator can output a variety of waveform signals. Specifications Product Specifications Operation time 10 hrs (in continuous operation) Charging time 2 hrs Display 96 x 16 OLED Size Controller 47 mm Test Arms 106 mm Weight 22 g Operation Hidden touch button Measurement Specifications Range Resolution Accuracy Resistance 0.1 Ω~1 KΩ 0.1 Ω 0.5%+2 1 KΩ~2000 KΩ 1 KΩ 0.5%+2 Capacitance 0.1 pF~1000 pF 0.1 pF 2%+3 0.001uF~400 uF 0.001 uF 2%+3 Inductance 1 uH~1000 uH 1 uH 5%+3 1 mH~50 mH 1 mH 5%+3 Voltage 1 mV~100 mV 1 mV 2%+5 0.1 V~40 V 0.1 V 1%+3 Frequency 10 Hz~1 KHz 10 Hz 0.1%+3 1 KHz~20000 KHz 1 KHz 0.1%+3 Diode Silicon diodes, Schottky diodes, LEDs (+0.1~3V) 0.1 V 1% Max input voltage -5 V~+50 V Source Impedance 1 MΩ Functions Automatic Identification Yes Designated Measurements Yes Continuity and Diode testing Yes Signal Generator SINE 10 KHz, 5 KHz, 2 KHz, 1 Khz, 500 Hz, 200 Hz NOISE 100 KHz USER 10 KHz, 5 KHz, 2 KHz, 1 Khz, 500 Hz, 200 Hz PULSE 100 KHz, 0 KHz, 20 Khz, 10 KHz, 5 KHz, 2 KHz, 1 Khz, 500 Hz, 200 Hz Included 1x DT71 Digital Tweezers 1x Test Arms 2x Tweezer Tips 1x Data Cable 1x Carrying Case 1x Safety Instructions Downloads Manual Firmware v1.15 Calibration v2.0

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OWON SDS1102 is an affordable desktop digital oscilloscope with top features: 2-channel device with 100 MHz bandwidth, 1 GSa/s sample rate, 7" LCD display and 10 K pts wavelength. OWON SDS1102 has a simplified synchronization system which supports two trigger types: level and edge. Designed to solve problems that do not require large amounts of memory and difficult trigger types. Features Bandwidth: 100 MHz 2 channels Sample rate: 100 MS/s Ultra-thin body 7-inch high resolution LCD SCPI and LabVIEW supported Specifications Bandwidth 100 MHz Horizontal Scale (s/div) 5 ns/div – 1000 s/div Channel 2 Vertical Sensitivity 5 mV/div – 5 V/div (at input) DC Gain Accuracy 3% Vertical Resolution (A/D) 8 bits (2 channels simultaneously) Input Input Impedance 1 MΩ, 10 pF Input Coupling AC, DC, GND Max Input Voltage ±400 V, CATI, CATII Passive probes х1; х10 Probe Attenuation Factor х1; х10; х100; х1000 Trigger System Trigger Mode Auto, Normal, Single Trigger Type Edge, Video Edge Trigger Source CH1, CH2 Video Trigger Sampling Type Real-time Sample Rate 1 GSa/s Equivalent Sample Rate No Wavelength 10K pts Interpolation sin(x)/x Measurement and Mathematical Treatment System Automatic Measurement Vpp, Vavg, RMS, Frequency, Period, Vmax, Vmin, Vtop, Vbase, Width, Overshoot, Pre-shootRise time, Fall time, +Width, -Width, +Duty, -Duty, Delay A→B, Delay A→B, area, cycle area Math Functions Addition, Subtraction, Multiplication, Division, FFT General Characteristics Display type 7" color LCD Display Resolution 800 x 480 Power 100-240 V, 45-440 Hz, <15 W Dimensions 301 x 70 x 152 mm Weight 1.1 kg Included 1x OWON SDS1102 Oscilloscope 2x Oscilloscope probe 1x Probe Adjust 1x Mains power cord 1x USB Cable 1x CD-Rom 1x Quick Start Guide Downloads Manual Datasheet

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The project book, written by well-known Elektor author Dogan Ibrahim, is an introduction to using the Raspberry Pi Pico Experimenting Kit. The kit is based on the Raspberry Pi Pico processor and includes several on-board as well as external sensors, and an actuator. The kit is programmed using the MicroPython programming language. The Thonny development environment (IDE) is used in all the projects in the book. All the projects given in the book have been fully tested and are working. No prior programming or electronic experience are required to follow the projects.The book’s fully evaluated projects feature all the supplied components. Each project includes a block diagram, a circuit diagram, a full program listing, and a complete program description.Included in the bundle Raspberry Pi Pico RP2040 Pico Expansion Board 1.44-inch TFT LCD with ST7735 driver 3x Pushbutton input 3x LED output 1x Active buzzer 6x Interfaces (UART/GPIO/I²C/ADC) Grove-compatible Powered by Micro-USB 8 Modules MPU6050 6-axis IMU DHT11 humidity & temperature sensor 10 A relay SG90 servo Slide potentiometer Serial-to-WiFi (ESP8266) module Ultrasonic range sensor 8-bit RGB addressable LED (WS2818) module Project book (178 pages) 42 Projects in the BookBoard-Hardware-Based Projects Flashing an on-board LED Flashing SOS Flashing LED – using a timer Alternately flashing LEDs Pushbutton control Changing the LED flashing rate using pushbutton interrupts Binary counting LEDs Randomly flashing yellow, green, and blue LEDs Chasing LEDs Reaction timer Buttons and LEDs The TFT Display Second counter Event counter Reaction timer Display LED and button status Temperature and humidity – display in Thonny window Temperature and humidity – LED output Temperature and humidity – display on TFT ON/OFF temperature control ON/OFF temperature control – setting the desired temperature Voltmeter Changing the brightness of an LED Ultrasonic distance measurement - display in Thonny window Ultrasonic distance measurement - display on TFT Height of a person (stadiometer) Ultrasonic reverse-parking aid with buzzer Ultrasonic liquid level controller Melody maker Servo motor control Accurate servo motor control WS2812 LED strip light show - state machine approach WS2812 LED strip light show – using the neopixel library WS2812 LED strip show – another neopixel library example Displaying 3 dimensions of acceleration A car’s maximum acceleration – using the TFT display Level display using the gyroscope MPU6050 temperature display TFT display test TFT bitmap display Using the WiFi Connect to the local Wi-Fi network and display the IP address Controlling an LED from a smartphone using Wi-Fi Displaying the temperature on a smartphone using Wi-Fi

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Measuring conducted emission is the simplest and most affordable method of getting some indication of whether a design can meet EMI/EMC requirements. A Line Impedance Stabilization Network (LISN) is an indispensable part of an EMC pre-compliance test setup. In cooperation with Würth Elektronik, Elektor has developed a 5 µH, 50 Ω Dual DC LISN that supports voltages up to 60 V and currents up to 10 A. The instrument measures RF interferences on both channels (the power supply) by means of 5-μH blocking inductances. The internal 10-dB attenuation network – one in each channel – contains a 3rd-order high-pass filter with a cutoff frequency of 9 kHz to protect the input of instruments like a spectrum analyzer from potentially harmful DC voltages or low frequencies coming from the EUT (Equipment Under Test). Specifications RF path Channels 2 (with clamping diodes) Bandwidth 150 kHz – 200 MHz Inductance 5 μH || 50 Ω Internal attenuation 10 dB Connectors SMA DC path Max. current < 10 ADC Max. voltage < 60 VDC DC resistance < 2 x 70 mΩ PCB size 94.2 x 57.4 mm Connectors 4-mm banana Hammond enclosure Type 1590N Dimensions 121 x 66 x 40 mm Included 1x 4-layer PCB with all SMT parts fitted 1x pre-drilled enclosure with ready-printed front panel layout 5x gold-plated, insulated, 4-mm banana sockets, rated for 24 A, 1 kV 1x Hammond enclosure 1590N1, Aluminum (Die-Cast Alloy) More Info Project on Elektor Labs: Dual DC LISN for EMC pre-compliance testing Elektor 9-10/2021: EMC Pre-Compliance Test for Your DC-Powered Project (Part 1) Elektor 11-12/2021: EMC Pre-Compliance Test for Your DC-Powered Project (Part 2)

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When you experiment with the Raspberry Pi on a regular basis and you connect a variety of external hardware to the GPIO port via the header you may well have caused some damage in the past. The Elektor Raspberry Pi Buffer Board is there to prevent this! The board is compatible with Raspberry Pi Zero, Zero 2 (W), 3, 4, 5, 400 and 500. All 26 GPIOs are buffered with bi-directional voltage translators to protect the Raspberry Pi when experimenting with new circuits. The PCB is intended to be inserted in the back of Raspberry Pi 400/500. The connector to connect to the Raspberry Pi is a right angled 40-way receptacle (2x20). The PCB is only a fraction wider. A 40-way flat cable with appropriate 2x20 headers can be connected to the buffer output header to experiment for instance with a circuit on a breadboard or PCB. The circuit uses 4x TXS0108E ICs by Texas Instruments. The PCB can also be put upright on a Raspberry Pi. Downloads Schematics Layout

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The Elektor MultiCalculator Kit is an Arduino-based multifunction calculator that goes beyond basic calculations. It offers 22 functions including light and temperature measurement, differential temperature analysis, and NEC IR remote control decoding. The Elektor MultiCalculator is a handy tool for use in your projects or for educational purposes. The kit features a Pro Mini module as the computing unit. The PCB is easy to assemble using through-hole components. The enclosure consists of 11 acrylic panels and mounting materials for easy assembly. Additionally, the device is equipped with a 16x2 alphanumeric LCD, 20 buttons, and temperature sensors. The Elektor MultiCalculator is programmable with the Arduino IDE through a 6-way PCB header. The available software is bilingual (English and Dutch). The calculator can be programmed with a programming adapter, and it is powered through USB-C. Modes of Operation Calculator 4-Ring Resistor Code 5-Ring Resistor Code Decimal to Hexadecimal and Character (ASCII) conversion Hexadecimal to Decimal and Character (ASCII) conversion Decimal to Binary and Character (ASCII) conversion Binary to Decimal and Hexadecimal conversion Hz, nF, capacitive reactance (XC) calculation Hz, µH, inductive reactance (XL) calculation Resistance calculation of two resistors connected in parallel Resistance calculation of two resistors connected in series Calculation of unknown parallel resistor Temperature measurement Differential temperature measurement T1&T2 and Delta (δ) Light measurement Stopwatch with lap time function Item counter NEC IR remote control decoding AWG conversion (American Wire Gauge) Rolling Dice Personalize startup message Temperature calibration Specifications Menu languages: English, Dutch Dimensions: 92 x 138 x 40 mm Build time: approx. 5 hours Included PCB and though-hole components Precut acrylic sheets with all mechanical parts Pro Mini microcontroller module (ATmega328/5 V/16 MHz) Programming adapter Waterproof temperature sensors USB-C cable Downloads Software

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The Andonstar AD409 microscope is equipped with a 10.1-inch LCD display, giving you a wider viewing range, free your eyes from fatigue. Features 10.1 inch adjustable LCD display Adjustable metal stand & monitor Two metal fixed clips microSD card Capture & Recording Built-in adjustable LEDs HDMI/USB Software supported Specifications Screen size 10.1 inch (25.7 cm) Image sensor 4 MP Video output UHD 2880x2160 (24fps)FHD 1920x1080 (60fps/30fps)HD 1280x720 (120fps) Video format MP4 Magnification Up to 300 times (27 inch HDMI monitor) Photo resolution Max. 12 MP (4032x3024) Photo format JPG Focus range Min. 5 cm Frame Rate Max. 120fps Video interface HDMI Storage microSD card (up to 32 GB) PC support Windows, PC software with measurement Mobile phone, tablet terminal support Support WiFi connection and measurement Power source 5 V DC Light source 2 LEDs with the stand Stand size 18 x 20 x 30 cm Included 1x Andonstar AD409 Digital Microscope 1x Metal stand with 2 LEDs 1x UV filter (already assembled in the lens) 1x IR remote 1x Switch cable 1x Power adapter 1x HDMI cable 1x Manual Downloads Manual Software Model Comparison AD407 AD407 Pro AD409 AD409 Pro-ES Screen size 7 inch (17.8 cm) 7 inch (17.8 cm) 10.1 inch (25.7 cm) 10.1 inch (25.7 cm) Image sensor 4 MP 4 MP 4 MP 4 MP Video output 2160p 2160p 2160p 2160p Interfaces HDMI HDMI USB, HDMI, WiFi USB, HDMI, WiFi Video format MP4 MP4 MP4 MP4 Magnification Up to 270x Up to 270x Up to 300x Up to 300x Photo resolution Max. 4032x3024 Max. 4032x3024 Max. 4032x3024 Max. 4032x3024 Photo format JPG JPG JPG JPG Focus distance Min. 5 cm Min. 5 cm Min. 5 cm Min. 5 cm Frame rate Max. 120f/s Max. 120f/s Max. 120f/s Max. 120f/s Storage microSD card microSD card microSD card microSD card PC support No No Windows Windows Mobile connection No No WiFi + Measurement WiFi + Measurement Power source 5 V DC 5 V DC 5 V DC 5 V DC Light source 2 LEDs with the stand 2 LEDs with the stand 2 LEDs with the stand 2 LEDs with the stand Endoscope No No No Yes Stand size 20 x 12 x 19 cm 20 x 18 x 32 cm 18 x 20 x 30 cm 18 x 20 x 32 cm Weight 1.6 kg 2.1 kg 2.2 kg 2.5 kg

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Examine your circuits with high precision and solder even the smallest SMDs and elements without any hassle. Features Multifunctional HDMI Digital Microscope features Full HD, comfortable headroom, improved ergonomy, multiple output signals with different resolutions. Tilt angle of the wide LCD monitor is adjustable. Comes with remote control. Can be used as stand-alone. Specifications Screen size 7 inch (17.8 cm) Image sensor 4 MP Video output UHD 2880x2160 (24fps)FHD 1920x1080 (60fps/30fps)HD 1280x720 (120fps) Video format MP4 Magnification Up to 270 times (27 inch HDMI monitor) Photo resolution Max. 12 MP (4032x3024) Photo format JPG Focus range Min. 5 cm Frame rate Max. 120fps (under 600 Lux Brightness & HDP120) Video interface HDMI Storage microSD card (up to 32 GB) Power source 5 V DC Light source 2 LEDs with the stand Stand size 20 x 12 x 19 cm Included 1x Andonstar AD407 Digital Microscope 1x Metal stand with 2 LEDs 1x Optical bracket 1x UV filter 1x IR remote 1x Switch cable 1x Power adapter 1x HDMI cable 2x Screws 1x Screwdriver 1x User manual Downloads Manual Model Comparison AD407 AD407 Pro AD409 AD409 Pro-ES Screen size 7 inch (17.8 cm) 7 inch (17.8 cm) 10.1 inch (25.7 cm) 10.1 inch (25.7 cm) Image sensor 4 MP 4 MP 4 MP 4 MP Video output 2160p 2160p 2160p 2160p Interfaces HDMI HDMI USB, HDMI, WiFi USB, HDMI, WiFi Video format MP4 MP4 MP4 MP4 Magnification Up to 270x Up to 270x Up to 300x Up to 300x Photo resolution Max. 4032x3024 Max. 4032x3024 Max. 4032x3024 Max. 4032x3024 Photo format JPG JPG JPG JPG Focus distance Min. 5 cm Min. 5 cm Min. 5 cm Min. 5 cm Frame rate Max. 120f/s Max. 120f/s Max. 120f/s Max. 120f/s Storage microSD card microSD card microSD card microSD card PC support No No Windows Windows Mobile connection No No WiFi + Measurement WiFi + Measurement Power source 5 V DC 5 V DC 5 V DC 5 V DC Light source 2 LEDs with the stand 2 LEDs with the stand 2 LEDs with the stand 2 LEDs with the stand Endoscope No No No Yes Stand size 20 x 12 x 19 cm 20 x 18 x 32 cm 18 x 20 x 30 cm 18 x 20 x 32 cm Weight 1.6 kg 2.1 kg 2.2 kg 2.5 kg

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This 2-in-1 hot air soldering station offers a cost-effective solution for soldering and desoldering all types of SMD components. Features Incl. soldering iron and hot air pump. It is suitable for soldering and desoldering all types of surface mounted IC, PCB or components. The control unit has 2 LEDs that display the temperature and in °C and °F. The temperature can be easily adjusted with simple up/down buttoms. The hot air temperature can be calibrated from 3L/min to 24L/min continuously. Temperature is micro-processor controlled and can be adjusted. Temperature range: 50-480°C for soldering iron, 100-500°C for hot air pump. Specifications Power Soldering iron: 24 V, 60 WHot air pump: 300 W Power supply 220-240 V AC/50 Hz Temperature range Soldering iron: 50-480°CHot air pump: 100-500°C Dimensions 113 x 125 x 175 mm Weight 2 kg Included 1x ZD-8922 Rework station 1x Soldering iron 1x Hot air gun 3x Hot air nozzles 1x Soldering iron with needle bit 1x Power cord 1x Soldering iron stand with sponge

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Electric motors are found in countless electronic appliances and devices in and around our homes. In these devices, motor controllers are used to ensure efficient, safe, and accurate ways to govern the speed or the actuator position of the motor(s) used. Electric motors can be classified as either DC or AC depending on the type of voltage used to control them. DC motors are the oldest type of electric motors and they are widely used by electronics developers both in home labs and in schools and laboratories. Almost all printers, cameras, robots, and CNC machines in consumer, commercial, and industrial applications use some kind of DC motor. AC motors on the other hand are used in many home appliances and tools as they can be powered directly from an AC power outlet. Cytron’s Maker Pi RP2040 Development Board is an advanced system based on the RP2040 processor and developed with motor control applications in mind. The board comes with dual-channel brushed DC motor controller hardware, 4 servo motor ports, and 7 Grove-compatible I/O ports, making it an ideal platform within mobile robotics applications, for robot arm control, or in any other type of application requiring precise control of motors and actuators. The project book, written by well-known Elektor author Dogan Ibrahim, includes over 50 projects using LEDs, a buzzer, an OLED display, an ADC converter, an ultrasonic sensor, PWM, and temperature and humidity control. The main chapters cover DC motor control, servo motor control and stepper motor control using the Maker Pi RP2040 Development Board in creative and educational ways. Included in the bundle Cytron Maker Pi RP2040 Development Board Electronic Parts 1 k-ohm resistors 10 k-ohm resistor 12 k-ohm resistor 470 ohm resistor LED Relay, 3 V/10 A LDR, 10 k-ohm Jumper wires (male-male) Breadboard Sensors TMP36 (temperature) DHT11 (temperature and humidity) Modules 5 V Stepper Motor with ULN2003 Driver HC-SR04 (ultrasonic) SSD1306 (I²C OLED) KY-021 (reed switch) DC motor (brushed, miniature, 3 V, 12 krpm) SG90 (servo motor) Project Book (191 pages) 52 Projects in the Book Simple LED Projects Flashing LED Flashing SOS signal All LEDs ON and OFF Binary counting LEDs Rotating LEDs Randomly flashing LEDs Rotating LEDs with pushbutton control Reaction timer Two-player reaction game Using the on-board NeoPixel LEDs – showing different colors Using the on-board NeoPixel LEDs – flash both NeoPixels randomly Simple Buzzer Projects Playing the middle C tones Using the buzzer as an audible sound indicator Playing a melody – Happy Birthday Frequency sweeping Using OLED Displays Displaying text on OLED Displaying common shapes Seconds counter Drawing bitmaps Using Analog To Digital Converters Voltmeter Temperature measurement ON/OFF temperature controller ON/OFF temperature controller with OLED display Measuring ambient light intensity Ohmmeter Pulse Width Modulation (PWM) Generate a 1000 Hz PWM waveform with 50% duty cycle Changing the brightness of an LED Alarm sound on buzzer Electronic organ Ultrasonic Sensor Projects Ultrasonic distance measurement Ultrasonic distance measurement with OLED readout Measuring the level of water in a tank Ultrasonic reverse parking aid with buzzer Temperature and Relative Humidity Temperature and relative humidity measurement Temperature and relative humidity measurement with OLED DC Motor Control Projects DC motor ON/OFF control Two-speed DC motor rev control Varying the motor speed Using two DC motors Changing the motor direction LDR-based motor control Magnetic reed switch based motor control Displaying the speed of a DC motor – using a rotary encoder Displaying the speed of a DC motor on OLED – using a rotary encoder Time response of the motor with the encoder Measuring and displaying the motor speed using interrupts Proportional+Integral+Derivative (PID) motor speed control Servo Motor Control Projects Servo motor control – turn to 0, 90, and 180 degrees positions Using two servo motors – turn to 0, 90, and 180 degrees positions Ultrasonic sonar Stepper Motor Control Projects Basic stepper motor control Thermometer with dial

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What kind of device is this? And what can you do with it? Well, this device doesn't need much explanation. The most useless device in the world! The Useless Box literally serves no purpose, but at the same time it's so hilarious that you'll want to show it to everyone. With this kit you have the opportunity to build your own Useless Box and expand your technical knowledge. Ultimately, this device switches off every time it is switched on and therefore performs a completely pointless function. Still curious? Then watch the video below. A must-have for every office: at home or at work!

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More than 200 power supply designs for home construction This USB Stick contains over 200 different power supply circuits from the volumes 2001-2022 of Elektor. The article search feature allows you to search full-text content. The results are always displayed as pre-formatted PDF documents. Highlights Cuk Converter Automatic Battery Switchover Battery Voltage LED Digital Benchtop Power Supply Lithium-Ion Charger Solar Cell Charger Electronic Fuse High Voltage Regulator Power Supply for USB Devices Step-up Converter for LEDs Battery Management and much more... On the Stick you will also find a folder with additional material such as PCB layouts, Gerber files and software.

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PiKVM V3 is an open-source Raspberry Pi-based KVM over IP device. It will help you to manage servers or workstations remotely, whatever the state of the operating system or whether one is installed. PiKVM V3 allows you to turn on/off or restart your computer, configure the UEFI/BIOS, and even reinstall the OS using the virtual CD-ROM or flash drive. You can use your remote keyboard and mouse or PiKVM can simulate a keyboard, mouse, and a monitor, which are then presented in a web browser as if you were working on a remote system directly. Features HDMI Full HD capture based on the TC358743 chip (extra low latency ~100 ms and many features like compression control). OTG Keyboard & mouse; Mass Storage Drive emulation. Ability to simulate 'removal and insertion' for USB. Onboard ATX power control Onboard fan controller Real-time clock (RTC) RJ-45 and USB serial console port (to manage PiKVM OS or to connect with the server). Optional AVR-based HID (for some rare and strange motherboards whose BIOS doesn't understand the OTG emulated keyboard). Optional OLED screen to display network status or other desired information. Ready-made board. No need for soldering or breadboarding. PiKVM OS – the software is fully open. Included PiKVM V3 HAT board for Raspberry Pi 4 USB-C bridge board – to connect the HAT with Pi over USB-C ATX controller adapter board and wiring – to connect the HAT to the motherboard (if you want to manage power supply through hardware). 2 flat CSI cables Screws and brass standoffs Required Raspberry Pi 4 MicroSD card USB-C to USB-A cable HDMI cable Straight Ethernet cable (for the ATX expansion board connection) Power supply unit (5.1 V/3 A USB-C, officiel RPi power supply is recommended) Downloads User Guide Images GitHub Links The PiKVM Project and Lessons Learned: Q&A with PiKVM creator and developer Maxim Devaev PiKVM: Raspberry Pi as a KVM Remote Control

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The book "Node-RED and Raspberry Pi Pico W" describes the Node-RED programming environment in great detail with exciting applications on 527 pages. Only at Elektor, the book gets solid hardware support in the form of the popular SunFounder Kepler Kit with over 450 components including a Raspberry Pico W board. With this bundle, most of the experiments and programming exercises contained in the book can be carried out successfully. This bundle contains: Book: Node-Red and the Raspberry Pi Pico W (normal price: €50) SunFounder Kepler Kit voor Raspberry Pi Pico W (normal price: €70) Book: Node-RED and Raspberry Pi Pico W From basics to flows for sensors, automation, motors, MQTT, and cloud services This book is a learning guide and a reference. Use it to learn Node-RED, Raspberry Pi Pico W, and MicroPython, and add these state-of-the-art tools to your technology toolkit. It will introduce you to virtual machines, Docker, and MySQL in support of IoT projects based on Node-RED and the Raspberry Pi Pico W. This book combines several elements into a platform that powers the development of modern Internet of Things applications. These elements are a flow-based server, a WiFi-enabled microcontroller, a high-level programming language, and a deployment technology. Combining these elements gives you the tools you need to create automation systems at any scale. From home automation to industrial automation, this book will help you get started. Node-RED is an open-source flow-based development tool that makes it easy to wire together devices, APIs, and online services. Drag and drop nodes to create a flowchart that turns on your lights at sunset or sends you an email when a sensor detects movement. Raspberry Pi Pico W is a version of the Raspberry Pi Pico with added 802.11n Wi-Fi capability. It is an ideal device for physical computing tasks and an excellent match to the Node-RED. Quick book facts Project-based learning approach. Assumes no prior knowledge of flow-based programming tools. Learn to use essential infrastructure tools in your projects, such as virtual machines, Docker, MySQL and useful web APIs such as Google Sheets and OpenWeatherMap. Dozens of mini-projects supported by photographs, wiring schematics, and source code. Get these from the book GitHub repository. Step-by-step instructions on everything. All experiments are based on the Raspberry Pi Pico W. A Wi-Fi network is required for all projects. Downloads GitHub SunFounder Kepler Kit voor Raspberry Pi Pico W Your gateway to IoT and microcontroller programming With 450+ components and 117 online projects, this comprehensive kit ignites your creativity. The tutorials by Paul McWhorter make learning enjoyable for beginners and advanced users. This kit supports MicroPython, C/C++, and Piper Make, offering diverse programming options. Explore sensors, actuators, LEDs, and LCDs for endless project possibilities. From home automation to robotics, this kit empowers your tech journey. Features IoT Starter Kit for Beginners: This kit offers a rich IoT learning experience for beginners. With 450+ components, 117 projects, and expert-led video lessons, this kit makes learning microcontroller programming and IoT engaging and accessible. Expert-Guided Video Lessons: The kit includes 27 video tutorials by the renowned educator, Paul McWhorter. His engaging style simplifies complex concepts, ensuring an effective learning experience in microcontroller programming. Wide Range of Hardware: The kit includes a diverse array of components like sensors, actuators, LEDs, LCDs, and more, enabling you to experiment and create a variety of projects with the Raspberry Pi Pico W. Supports Multiple Languages: The kit offers versatility with support for three programming languages - MicroPython, C/C++, and Piper Make, providing a diverse programming learning experience. Dedicated Support: Benefit from our ongoing assistance, including a community forum and timely technical help for a seamless learning experience. Included Raspberry Pi Pico W Breadboard Jumper Wires Resistor Transistor Capacitor Diode Li-po Charger Module 74HC595 TA6586 – Motor Driver Chip LED RGB LED LED Bar Graph 7-segment Display 4-Digit 7-Segment Display LED Dot Matrix I²C LCD1602 WS2812 RGB 8 LEDs Strip Buzzer DC Motor Servo DC Water Pump Relay Button Micro Switch Slide Switch Potentiometer Infrared Receiver Joystick Module 4x4 Keypad MPR121 Module MFRC522 Module Photoresistor Thermistor Tilt Switch Reed Switch PIR Motion Sensor Module Water Level Sensor Module Ultrasonic Module DHT11 Humiture Sensor MPU6050 Module Documentation Online Tutorial

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Raspberry Pi-based Eye Catcher A standard sand clock just shows how time passes. In contrast, this Raspberry Pi Pico-controlled sand clock shows the exact time by “engraving” the four digits for hour and minute into the layer of sand. After an adjustable time the sand is flattened out by two vibration motors and everything begins all over again. At the heart of the sand clock are two servo motors driving a writing pen through a pantograph mechanism. A third servo motor lifts the pen up and down. The sand container is equipped with two vibration motors to flatten the sand. The electronic part of the sand clock consists of a Raspberry Pi Pico and an RTC/driver board with a real-time clock, plus driver circuits for the servo motors. A detailed construction manual is available for downloading. Features Dimensions: 135 x 110 x 80 mm Build time: approx. 1.5 to 2 hours Included 3x Precut acrylic sheets with all mechanical parts 3x Mini servo motors 2x Vibration motors 1x Raspberry Pi Pico 1x RTC/driver board with assembled parts Nuts, bolts, spacers, and wires for the assembly Fine-grained white sand

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Fumes released during the soldering process are potentially harmful to health. This solder fume extractor is securely fastened to the work table with a bracket. Thanks to the 3 axes, the solder fume extractor can be positioned perfectly, i.e. directly above the rising solder fumes. The harmful solder fumes are extracted by a powerful but quiet fan and filtered by an activated-carbon filter mat. Features Removes solder fumes Absorbs toxic gases and fumes from brazing operations Helps reduce the likelihood of headaches, eye irration and neusea Adjustable absorption angle for accurate placement Easy replaceable activated carbon filter High-performance fan Low noise and long life service Specifications Absorption capacity: 1 m³/min (max.) Power consumption: 23 W Power supply: 220-240 VAC Amount of activated carbon filter: 7 g Maximum absorption weight: 2 g Dimensions: 220 x 270 x 168 mm (W x H x D) Weight: 1.4 kg

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Getting started in electronics is not as difficult as you may think. With this bundle (book + kit of parts), you can explore and learn the most important electrical and electronics engineering concepts in a fun way by doing various experiments. You will learn electronics practically without getting into complex technical jargon and long calculations. As a result, you will be creating your own projects soon. This kit contains the components required to build most of the detailed examples of the book on a breadboard and try them out for real. The kit can, of course, also be used without the book for building other circuits and doing your own experiments. Kit contents 1x 39 Ω, 1 W resistor 1x 47 Ω resistor 1x 180 Ω resistor 1x 330 Ω resistor 3x 1 kΩ resistor 1x 2.2 kΩ resistor 1x 3.9 kΩ resistor 1x 6.8 kΩ resistor 1x 10 kΩ resistor 1x 15 kΩ resistor 1x 22 kΩ resistor 1x 33 kΩ resistor 1x 47 kΩ resistor 1x 56 kΩ resistor 1x 82 kΩ resistor 1x 120 kΩ resistor 1x 680 kΩ resistor 2x 100 kΩ resistor 1x 10 kΩ trimmer 1x 10 kΩ linear potentiometer 1x 100 kΩ linear potentiometer 1x LDR 1x 1 nF ceramic capacitor 2x 10 nF ceramic capacitor 1x 100 nF ceramic capacitor 1x 1 µF, 25 V aluminium electrolytic capacitor 2x 10 µF, 25 V aluminium electrolytic capacitor 1x 100 µF, 25 V aluminium electrolytic capacitor 1x 470 µF, 25 V aluminium electrolytic capacitor 1x 1000 µF, 25 V aluminium electrolytic capacitor 1x RGB LED, Common-Cathode (CC) 1x 1N4148 small signal diode 1x 1N4733A 5.1 V, 1 W Zener diode 3x LED, red 2x BC337 NPN transistor 1x IRFZ44N N-channel MOSFET 2x NE555 timer 1x LM393 comparator 1x 74HCT08 quad AND gate 3x Tactile switch 2x SPDT switch 1x Relay, SPDT, 9 VDC 1x Active buzzer 1x Passive buzzer 50 cm Solid wire, 16 AWG, unjacketed 2x PP3 9 V battery clip 1x Breadboard 20x Jumper wire This bundle contains: Practical Electronics Crash Course Kit (valued at: €45) Book: Practical Electronics Crash Course (normal price: €45)

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The OWON XDM1041 is a fast, high-precision digital True RMS benchtop multimeter with a high-resolution 3.5-inch LCD and 50,000 counts. Its DC voltage accuracy is up to 0.05% and it can measure up to 65 values per second. Features 3.5“ high-resolution LCD (480x320 pixels) 55000 counts, DC voltage accuracy up to 0.05% Up to 65 readings per second Dual line display supported Trend analysis accessible in chart mode AC True RMS measurements (bandwidth: 20 Hz – 1 kHz) SCPI support: Remote control the multimeter through PC software via USB port Data record function, you can record the measured data into internal memory, and then read and process the recorded data with your computer. Specifications Measurement Range Resolution Accuracy DC Voltage 50.000 mV 0.001 mV 0.1% +10 500.00 mV 0.01 mV 0.05% +5 5.0000 V 0.0001 V 0.05% +5 50.000 V 0.001 V 0.05% +5 500.00 V 0.01 V 0.1% +5 1000.0 V 0.1 V 0.1% +10 AC Voltage 500 mV～750 V 20 Hz～45 Hz 1% +30 45 Hz～65 Hz 0.5% +30 65 Hz～1 KHz 0.7% +30 DC Current 500 uA 0.01 uA 0.15% +20 5000 uA 0.1 uA 0.15% +10 50 mA 0.001 mA 0.15% +20 500 mA 0.01 mA 0.15% +10 5 A 0.0001 A 0.5% +10 10 A 0.001 A 0.5% +10 AC Current 500 uA～500 mA 20 Hz～1 KHz 0.5% +20 5 A-10 A 1.5% +20 Resistance 500 Ω 0.01 Ω 0.15% +10 5 KΩ 0.0001 KΩ 0.15% +5 50 KΩ 0.001 KΩ 0.15% +5 500 KΩ 0.01 KΩ 0.15% +5 5 MΩ 0.0001 MΩ 0.3% +5 50 MΩ 0.001 MΩ 1% +10 Frequency 10.000 Hz～60 MHz / ±(0.2% +10) Capacitance 50 nF～500 uF / 2.5% +10 5 mF～50 mF 5% +10 Diode 3.0000 V 0.0001 V / Continuity 1000 Ω 0.1 Ω Adjustable threshold Temperature K type, PT100 Max Display 55,000 counts Data-logging Function Logging Duration 15ms～9999.999s Logging Length 1,000 points Display 3.5“ TFT LCD (480x320 pixels) Power supply 230 V AC mains voltage Dimensions 200 x 88 x 150 mm Weight approx. 0.5 kg Included 1x OWON XDM1041 Multimeter 1x Power cord 2x Test leads 1x Fuse 1x USB cable 1x Manual Downloads Programming Manual PC Software

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This temperature-controlled digital soldering station with adjustable temperature range from 160°C to 480°C is an affordable and reliable tool for all kinds of soldering work in the (home) laboratory. Thanks to the high-quality coated heating element, the desired soldering temperature (Celsius or Fahrenheit) is quickly reached and shown on the LED display. Features A temperature controlled soldering station with adjustable temperature range from 160°C to 480°C (320°F to 896°F). A two-line LED readout simultaneously displays temperature setting and actual temperature. Gloss finish pleasing to the eye. Compact and lightweight soldering iron with silicone cord. A user-friendly soldering iron handle with a foam sleeve. Easier way to achieve °C/°F conversion with the asterisk button. Specifications Power 25 W (max. 50 W) Display LED Temperature 160°C to 480°C (320°F to 896°F) Temperature deviation ±5% Grounded Yes Heating rate Melt solder within 20s Withstand voltage 1500/1MA Input voltage AC 220-240 V (50 Hz) Output voltage 24 V Included ZD-8961-A Soldering station Solderin iron stand Soldering iron with soldering tip N8-1 Cleaning sponge Cleaning ball Power cord (EU)

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Comprehensive Book-Hardware Bundle for the RP2040 Microcontroller with over 80 Projects Unlock the potential of modern controller technology with the Raspberry Pi Pico in this bundle. Perfect for both beginners and experienced users, the easy-to-follow guide takes you from the basics of electronics to the complexities of digital signal processing. With the Raspberry Pi Pico, the dedicated hardware kit and MicroPython programming, you will learn the key principles of circuit design, data collection, and processing. Get hands-on with over 80 projects like a stopwatch with an OLED display, a laser distance meter, and a servo-controlled fan. These projects are designed to help you apply what you've learned in real-world scenarios. The book also covers advanced topics like wireless RFID technology, object detection, and sensor integration for robotics. Whether you're looking to build your skills in electronics or dive deeper into embedded systems, this bundle is the perfect resource to help you explore the full potential of the Raspberry Pi Pico. Contents of the Bundle 1x Project Book (273 pages) 1x Raspberry Pi Pico WH 1x Raspberry Pi Pico H 1x Smart Car Kit Electronic Parts 2x Solderless breadboard (400 holes) 1x Solderless breadboard (170 holes) 5x Colorful 5 mm LEDs (green, red, blue, yellow and white) 1x Laser transmitter 1x Passive buzzer 1x Micro USB cable (30 cm) 1x 65 Jumper wires 1x 20 cm male to female Dupont wire 1x Clear case 1x Magnet (diameter: 8 mm, thickness: 5 mm) 1x Rotary potentiometer 10x 2 KΩ resistors 2x M2.5x30 mm copper pillars 10x Phillips pan head screws 10x M2.5 nickel hex nuts 1x 2-inch dual-purpose screwdriver Modules 1x RGB module 1x 9G servo 1x Dual-axis XY joystick module 1x RC522 RFID module 1x 4 Bits digital LED display module 1x Traffic light display module 1x Rotary Encoder module 1x 1602 LCD Display module (Blue) 1x Photoresistor module 1x DC motor with male Dupont wire 1x Fan blade 1x Raindrops module 1x OLED module 1x Membrane switch keyboard 1x Mini magnetic spring module 1x Infrared remote control 1x Infrared receiver module 1x DC stepper motor driver board 1x Button Sensors 1x Vibration sensor 1x Soil moisture sensor 1x Sound sensor 1x Mini PIR motion sensor 1x Temperature & Humidity sensor 1x Flame sensor 2x Crash sensor 2x Tracking sensor 1x Ultrasonic sensor

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This bundle contains: Book: Building Wireless Sensor Networks with OpenThread (normal price: €40) Nordic Semiconductor nRF52840 USB Dongle (normal price: €20) Book: Building Wireless Sensor Networks with OpenThread This book will guide you through the operation of Thread, the setup of a Thread network, and the creation of your own Zephyr-based OpenThread applications to use it. You’ll acquire knowledge on: The capture of network packets on Thread networks using Wireshark and the nRF Sniffer for 802.15.4. Network simulation with the OpenThread Network Simulator. Connecting a Thread network to a non-Thread network using a Thread Border Router. The basics of Thread networking, including device roles and types, as well as the diverse types of unicast and multicast IPv6 addresses used in a Thread network. The mechanisms behind network discovery, DNS queries, NAT64, and multicast addresses. The process of joining a Thread network using network commissioning. CoAP servers and clients and their OpenThread API. Service registration and discovery. Securing CoAP messages with DTLS, using a pre-shared key or X.509 certificates. Investigating and optimizing a Thread device’s power consumption. Once you‘ve set up a Thread network with some devices and tried connecting and disconnecting them, you’ll have gained a good insight into the functionality of a Thread network, including its self-healing capabilities. After you’ve experimented with all code examples in this book, you’ll also have gained useful programming experience using the OpenThread API and CoAP. Nordic Semiconductor nRF52840 USB Dongle The nRF52840 dongle is a small, low-cost USB dongle that supports Bluetooth 5.3, Bluetooth mesh, Thread, ZigBee, 802.15.4, ANT and 2.4 GHz proprietary protocols. The dongle is the perfect target hardware for use with nRF Connect for Desktop as it is low-cost but still support all the short range wireless standards used with Nordic devices. The dongle has been designed to be used as a wireless HW device together with nRF Connect for Desktop. For other use cases please do note that there is no debug support on the dongle, only support for programming the device and communicating through USB. It is supported by most of the nRF Connect for Desktop apps and will automatically be programmed if needed. In addition custom applications can be compiled and downloaded to the dongle. It has a user programmable RGB LED, a green LED, a user programmable button as well as 15 GPIO accessible from castellated solder points along the edge. Example applications are available in the nRF5 SDK under the board name PCA10059. The nRF52840 dongle is supported by nRF Connect for Desktop as well as programming through nRFUtil. Features Bluetooth 5.2 ready multiprotocol radio 2 Mbps Long Range Advertising Extensions Channel Selection Algorithm #2 (CSA #2) IEEE 802.15.4 radio support Thread ZigBee Arm Cortex-M4 with floating point support DSP instruction set ARM CryptoCell CC310 cryptographic accelerator 15 GPIO available via edge castellation USB interface direct to nRF52840 SoC Integrated 2.4 GHz PCB antenna 1 user-programmable button 1 user-programmable RGB LED 1 user-programmable LED 1.7-5.5 V operation from USB or external Downloads Datasheet Hardware Files

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The FNIRDSI DSO-TC4 is a multifunctional transistor oscilloscope that is both comprehensive and practical. It is designed for use in maintenance and R&D applications, integrating an oscilloscope, transistor tester, and signal generator into a single device. Features Equipped with a 2.8-inch TFT color screen for a clear and intuitive display Built-in high-capacity rechargeable lithium battery (1500 mAh) with a standby time of up to 4 hours Compact and lightweight, ideal for mobile use Specifications Oscilloscope Analog Bandwidth 10 MHz Real-Time Sampling Rate 48 MSa/s Input Impedance 1 MΩ Coupling Mode AC/DC Test Voltage Range 1:1 Probe: 80 Vpp (+40 V) 10:1 Probe: 800 Vpp (+400 V) Vertical Sensitivity 10 mV/div~10 V/div (X1 range) Vertical Displacement Adjustable with indication Time Base Range 50ns~20s Trigger Mode Auto/Normal/Single Trigger Type Rising edge, Falling edge Trigger Level Adjustable with indication Waveform Freeze Yes (HOLD function) Automatic Measurement Max, Min, Avg, RMS, Vpp, Frequency, Cycle, Duty Cycle Component Tester Transistor Amplification factor "hfe"; Base-Emitter voltage "Ube", Ic/Ie, Collector-Emitter reverse leakage current "Iceo", Ices, Forward voltage drop of protection diode "Uf" Diode Forward voltage drop <5 V (Forward voltage drop, Junction capacitance, Reverse leakage current) Zener Diode 0.01~32 V Reverse Breakdown Voltage (K-A-A Test Area) Field-Effect Transistor (FET) JFET: Gate capacitance "Cg", Drain current Id under "Vgs", Forward voltage drop of protection diode "Uf" IGBT: Drain current Id under Vgs, Forward voltage drop of protection diode Uf MIOSTET: Threshold voltage "Vt", Gate capacitance "Cg", Drain-Source resistance "Rds", Forward voltage drop of protection diode "Uf" Unidirectional SCR Trigger voltage <5V, Gate level (Gate voltage) Bidirectional SCR Trigger current <6mA (Gate voltage) Capacitor 25pF~100mF, Capacitance value, Loss factor "Vloss" Resistor 0.01Ω~50MΩ Inductor 10μH~1000μH, DC resistance DS18B20 Temperature sensor, Pins: GND, DQ, VDD DHT11 Temperature and humidity sensor, Pins: VDD, DATA, GND Signal Generator Output Waveform Supports 13 waveform outputs Waveform Frequency 0-50 KHz Square Wave Duty Cycle 0-100% Waveform Amplitude 0.1-3.0 V General Display 2.8-inch TFT color screen Backlight Brightness adjustable Power Supply USB-C (5 V/1 A） Battery 3.7 V/1500 mAh Languages English, German, Spanish, Portuguese, Russian, Chinese, Japanese, Korean Dimensions 90 x 142 x 27.5 mm Weight 186 g Included 1x FNIRSI DSO-TC4 (3-in-1) Oscilloscope (10 MHz) 1x P6100 Oscilloscope probes (10X) 1x Alligator clip probe 3x Test hooks 1x Adapter 1x USB-C charging cable 1x Manual Downloads Manual Firmware V0.0.3 (+V1.0.9)

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This PCB holder is ideal for any application where a third or fourth hand and a magnifying lamp are needed. Features The helping hands with 4 adjustable gooseneck arms. LED magnifying lamp with USB-C interface. Metal base with non-slip rubber strips. Comes with a cleaning ball, a sponge, a solder wire stand and rosin. Specifications Length of gooseneck arms: 270 mm LED magnifying lamp with 5-diopter lens Power supply via USB Dimensions (stand): 185 x 175 x 20 mm Weight: 620 g

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