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Affordable solutions with the ESP8266 and 3D printing If you are looking for a small yet powerful IoT device, you are likely to come across the ESP8266 and compatible products on the market today. One of these, the Wemos/Lolin D1 Mini Pro board strikes a remarkable balance between cost and performance. A small and very affordable prototype board, the D1 Mini Pro stands out with its WiFi functionality and a 16-Mbytes flash memory for easy creation of a flash file system. In addition, there are sufficient input and output pins (only one analog input though) to support PWM, I²C, and One-Wire systems to mention but a few. The book describes the operation, modding, construction, and programming of home appliances including a colorful smart home accessory, a refrigerator/greenhouse controller, an AC powerline monitor, a door lock monitor, and an IKEA Trådfri controller. As a benefit, all firmware developed for these DIY, "IoT-ized" devices can be updated over-the-air (OTA). For most of the designs in the book, a small printed circuit board (PCB) and an enclosure are presented so readers can have a finished and attractive-looking product. Readers having – or with access to! – a 3D printer can "print" the suggested enclosures at home or in a shop. Some of the constructions benefit from a Raspberry Pi configured as a gateway or cms server. This is also described in detail with all the necessary configuring. You don’t need to be an expert but the prerequisites to successful replication of the projects include basic skills with PC software including the ability to surf the Internet. In terms of hardware, you should be comfortable with soldering and generally assembling the PCBs presented in the book. All custom software written for the IoT devices, the PCB layouts, and 3D print files described in the book are available for free downloading.

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IMAGE PROCESSING WITH THE NVIDIA JETSON NANO (PART 2)Image Recognition Using Edge Impulse ELEKTOR JUMPSTARTER NEWSUpcoming Campaigns AN OPEN-SOURCE GPS TRACKING PLATFORMTraccar Maps Vehicle Tracking Without the Need for a Third-Party Cloud Server JOY-IT LCR-T7 MULTI-FUNCTION TESTERTesting Passives, Discrete Semiconductors and IR Remote Controls NOISE SYNTHESIZERFrom Noise to Music with the PRBSynth1 STARTING OUT IN ELECTRONICSEasier than Imagined! ... Continuing with the Coil UNDERSTANDING THE NEURONS IN NEURAL NETWORKS (PART 2)Logical Neurons ISSUES WITH SECURITY? FIGHT FIRE WITH FIRE!Flashbulb-Protected Analogue Memory Add-on For the Tamper-Evident Box LCR METER POSTER BLUETOOTH BEACONS IN PRACTICEBeacons Light the Way Ahead C PROGRAMMING ON RASPBERRY PICommunicating over Wi-Fi (Sample Chapter) EMC PRE-COMPLIANCE TEST FOR YOUR DC-POWERED PROJECT (PART 2)The Hardware and How to Use It HANDS ON THE PARALLAX PROPELLER 2 (PART 5)Inside the Smart Pin MODBUS OVER WLAN (PART 1)Hardware and Programming HOMELAB TOURSWhere the Junior Computer Is Brought to Life Again BUILD YOUR OWN HIGH-PRECISION CALIBRATOR-10 V to +10 V, 0 to 40 mA, 0.001% ARDUINO NANO RP2040 CONNECTRaspberry Pi RP2040 + Wi-Fi + Bluetooth THE PHYSICAL BODY OF ARTIFICIAL INTELLIGENCE ERR-LECTRONICSCorrections, Updates and Readers’ Letters CREATE GUIS WITH PYTHONIntroducing guizero CO2 METER KIT FOR THE CLASSROOMAn ESP8266-Based Device from the University of Applied Sciences Aachen NOSTALGIC MK484 MW/LW RADIO...Always Fun to Build! ELEKTOR @ 60Let There Be Light! HEXADOKUThe Original Elektorized Sudoku

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COMMANDE DE MOTEURS : LES PONTS EN HIntroduction aux moteurs CC, pas à pas et sans balais L?ÉQUIPE D?ELEKTOR LABNotre approche, nos outils préférés et plus encore RASPBERRY PI COMME TÉLÉCOMMANDE KVMTest du logiciel Pi-KVM IQAUDIO CODEC ZEROCarte son au format Raspberry Pi Zero LE PROJET PIKVM ET SES ENSEIGNEMENTSEntretien avec Maxim Devaev VÉHICULE AUTONOME AVEC LIDAR 2DUn ESP32 Pico interprète les données du lidar LE RASPBERRY PI ZERO 2 W PASSE AU QUADRICOEUR NOTES DU FORUM MONDIAL DE L?ÉLECTRONIQUE ÉTHIQUE 2021 COMMANDE DE MONTEURLa commande des moteurs devient simple MOTEURS ÉLECTRIQUES DE GRANDE TAILLEPrincipes de base et informations utiles PRISE EN MAIN DU MICROCONTRÔLEUR ESP32-C3 RISC-V PROTÉGEZ-VOUS ET PROTÉGEZ LES AUTRES !Interrupteur général pour paillasse (DIY) CRÉATION D?INTERFACES GRAPHIQUES EN PYTHON ÈME 2Mon nom n?est pas Bond GAGNANTS DU CONCOURS FAST FORWARD 2021 DU SALON PRODUCTRONICA TESTEUR DE SERVO POLYVALENTVérification du comportement en l?absence de fiche technique MODBUS SANS FIL (PARTIE 2)Logiciel de la carte Modbus TCP sans fil VOYAGE DANS LES RÉSEAUX NEURONAUX (3E PARTIE)Les neurones pratiques DANS L?INTIMITÉ D?UN PROCESSEUR OPEN SOURCEExtrait : résultats des FPGA Lattice et Xilinx DÉMARRER EN ÉLECTRONIQUE... (10)Toujours la bobine, mais avec ses applications pratiques dans l?audio. PROJET 2.0Corrections, mises à jour et courriers des lecteurs DE LA COULEUR AUSONComment exploiter un capteur de couleurs avec l?I2C SOURCEMÈTRE BATTLAB-ONEMesurer et optimiser la durée de vie des batteries des appareils IdO TRACEUR DE FUITES À LA TERRE SIMPLEMesure de l?isolation du secteur PAUVRETÉ ET ÉLECTRONIQUEQuand le courant économique passe mal HEXADOKUcasse-tête pour elektorniciens

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. CaptureCountAn Object Detector and Counter on the Raspberry Pi 5 Voltage Reference With Arduino Pro MiniLinearize and Calibrate Your Analog Inputs FPGAs for BeginnersThe Path From MCU to FPGA Programming Update: STM32 Wireless Innovation Design Contest 2024 Bluetooth LE With MAUIControl Apps for Android & Co. Port-Expanding Breakout BoardIncrease the Number of I/Os on Your Dev Board AI SpecialistMachine Learning with the Jetson Nano 2024: An AI OdysseyFirst Forays Into TensorFlow 262,144 Ways to Play The Game of LifeA Reader’s Project in Brief From Life’s ExperienceThe Chinese Dragon Get Your (Brushed DC) Motor Running!Sample Projects from the Elektor Motor Control Development Bundle ESP32-RS-232 AdapterA Wireless Link for Classic Test Equipment Starting Out in Electronics……More About Opamps ESP Library Recommendations Piezoelectric DevicesPeculiar Parts, the Series A Smart Object CounterImage Recognition Made Easy with Edge Impulse Resolve Your Trickiest Embedded Development Challenges ESP32 TerminalA Handheld Device with a Touch-Capable Display Getting Started With the Zephyr RTOSAs Powerful as It Is Hard to Master Award-Winning EthicsA Dialog with CTO Alexander Gerfer of Würth Elektronik eiSos on Enabling Innovation and Mindful Behavior Err-lectronicsCorrections, Updates, and Readers’ Letters Infographics: Embedded and AI Square Wave Generation BenchmarksExploring ESP32, Pico, and Other Microcontrollers

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. USB Measurement AdapterTesting Current and Signal Quality of USB Ports 4...20 mA Current Output for Arduino UnoA Reliable, EMI-Insensitive Current Loop Interface Vacuum Cleaner Automatic ControlKeep Your Tools’ Work Area Clean DDS Generator with ATtiny Opamp-Tester V2New PCB – Now Also Suitable for SMDs 550-mW “Lamp” Audio AmplifierGet the Warm Sound of Vacuum Tubes With Ease Fuse GuardMonitoring a Fuse with a Flashing LED HQ RIAA PreamplifierGet the Most Out of Your Vinyl Records! Turntable Speed CalibratorAn Arduino-Based 100–120 Hz Strobe Light Generator Elektor Classics: video buffer/repeater Infrared Remote-Controlled DimmerControl Your Halogen or LED Floor Lamp Effortlessly and With Style How to Use switch…case on Strings in C++/Arduino IDE Magnet FinderWith a Simple Hall-Effect Sensor Raspberry Pi Smart Power ButtonA Solution for Raspberry Pi Up to Model 4 Essential Maker TipsProfessional Insights for Everyday Making Practical Projects with the 555 TimerDC Motor Control and Fast Reaction Challenges Basic AC-Load-On MonitorSave Energy with a Simple Device Power Banks in ParallelA Three-Day Continuous Power Solution VFO Up to 15 MHzAn Implementation With Raspberry Pi Pico Violin Tuner with ATtiny202 Elektor Classics: video amplifier for B/W television sets Capacitance Meter20 pF to 600 nF Quasi-Analog Clockwork Mk IITwo LED Rings for Hours and Minutes You Can Do Anything You Want(with the Arduino Ecosystem at Your Side) Neon Lamp Dice Elektor Classics: RTTY calibrator indicator Inspiring Hardware Designs for Your ESPs Elektor Classics: variable 3 A power supply RGB LEDs with Integrated Control CircuitLight with Precision: ICLEDs Set Standards Experiment: Towards a Mixed-Signal Theremin?Blending Modern Time-of-Flight Sensors With the Timeless XR2206 Analog Generator ESP32 Audio Transceiver Board (Part 1)SD Card WAV File Player Demo Infographics: Circuits and Circuit Design 2025 Small Audio MixerA Simple and Versatile Scalable Design Smart Staircase Light TimerSave More Money on the Energy Bill! Smarten Up Your ShuttersControlling Velux Hardware With an ESP32 and MQTT Solid-State Foot WarmerEnergy-Efficient Comfort Is the M5Stamp Fly Quadcopter the Next Tello? Boosting Wi-Fi Range of the ESP32-C3 SuperMiniA Simple and Effective Antenna Mod ZD-8968 Hot-Air Soldering StationA Budget-Friendly Workhorse or Just Hot Air? Parking Sensor TesterFinding Defects in the PDC System of a Car

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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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DRIVING MOTORS WITH H-BRIDGESAn Introduction to DC, Stepper, and Brushless Motors THE ELEKTOR LAB TEAMOur Approach, Preferred Tools, and More RASPBERRY PI AS A KVM REMOTE CONTROLPi-KVM Software Test IQAUDIO CODEC ZEROA Sound Card for the Raspberry Pi Family THE PIKVM PROJECT AND LESSONS LEARNEDInterview with Maxim Devaev (Developer, PiKVM) AUTONOMOUS VEHICLE WITH 2D LIDARESP32 Pico Interprets Data from the Lidar Module THE RASPBERRY PI ZERO 2 W GOES QUAD-CORE NOTES FROM THE 2021 WORLD ETHICAL ELECTRONICS FORUM MOTOR CONTROLHow the Complexity of Motor Control Is Simplified LARGE ELECTRIC MOTORSBasic Principles and Useful Information GETTING STARTED WITH THE ESP32-C3 RISC-V MCU PROTECT YOURSELF AND OTHERS!DIY Master Power Switch for the Lab Bench CREATE GUIS WITH PYTHON (PART 2)Spy name chooser PRODUCTRONICA FAST FORWARD 2021 WINNERSExciting Technologies and Creative Engineering Solutions VERSATILE SERVO TESTERCheck Behavior When There’s No Datasheet MODBUS OVER WLAN (PART 2)Software for the Modbus TCP WLAN Module UNDERSTANDING THE NEURONS IN NEURAL NETWORKS (PART 3)Practical Neurons INSIDE AN OPEN-SOURCE PROCESSORSample Chapter: Lattice and Xilinx FPGA Results STARTING OUT IN ELECTRONICSWe Are Not Yet Done with the Coil ERR-LECTRONICSCorrections, Updates and Readers’ Letters COLOR TO SOUNDHow to Read Out a Color Sensor via I2C BATTLAB-ONEMeasure and Optimize the Battery Life of IoT Devices SIMPLE EARTH-LEAKAGE TRACERTesting Isolation of Mains Supply POVERTY AND ELECTRONICSSustainable Development Goal 1 HEXADOKUThe Original Elektorized Sudoku

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Raspberry Pi 5 provides two four-lane MIPI connectors, each of which can support either a camera or a display. These connectors use the same 22-way, 0.5 mm-pitch “mini” FPC format as the Compute Module Development Kit, and require adapter cables to connect to the 15-way, 1 mm-pitch “standard” format connectors on current Raspbery Pi camera and display products.These mini-to-standard adapter cables for cameras and displays (note that a camera cable should not be used with a display, and vice versa) are available in 200 mm, 300 mm and 500 mm lengths.

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Build Smart Applications with Raspberry Pi, Arduino, and ESP32 Discover how easy and exciting mobile app development can be with MIT App Inventor. This hands-on guide takes you from basic concepts to building real-world mobile applications using a simple visual programming approach—no prior coding experience required. You will create IoT and AI-powered apps for Android devices and explore how App Inventor can also be used with iPhones and iPads. Connect your applications to platforms such as Arduino UNO R4 WiFi, ESP32, Raspberry Pi Pico (2)W and Raspberry Pi 5, enabling you to build smart, connected systems. Inside the book, you will learn how to: Build interactive apps using buttons, images, sound, and multimedia Create text-to-speech and speech-recognition applications Develop camera-based and location-aware (GPS) apps Design useful tools such as calculators and educational apps Work with smartphone sensors like accelerometers and light sensors Build AI-powered applications, including voice assistants and image-generation features Send and receive messages, and create communication-based apps Connect mobile apps to hardware using Wi-Fi and Bluetooth Control real devices such as LEDs, motors, and sensors Designed for beginners, students, and hobbyists, this book focuses on learning by doing. By the end, you will have the skills and confidence to create your own innovative applications that interact with both the digital and physical worlds. Start building and turning your ideas into reality.

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From Simple Ciphers to Secure Systems Understanding how to apply cryptography on modern microcontrollers is essential for building secure, reliable, and trustworthy systems. This book explains cryptography in the context of embedded hardware, from classical ciphers that illustrate core principles to modern techniques such as AES for practical high-security applications. By combining mathematical theory with real-world microcontroller implementations, readers learn not only how cryptography works, but also how to implement it effectively on systems with limited processing power and memory. The book is intended for students starting out in cryptography, hobbyists securing personal projects, and engineers looking for a structured guide to embedded security. The book covers these key topics in applied cryptography: Classical ciphers on Arduino Uno and Raspberry Pi Pico, with full programs: Spartan Scytale, Hebrew Atbash, Caesar, ROT13, Alberti Disk, Vigenère, Affine, Polybius, Playfair, Beaufort, Ottoman Codebook, and One-Time Pad. Hacking classical ciphers using microcontrollers, with examples. Pseudo-random (PRNG) and true random number generation (TRNG) on microcontrollers. Symmetric-key cryptography with full programs: DES and AES-128/256. Memory and speed constraints of cryptography on microcontrollers. Asymmetric cryptography: public/private keys, digital signatures, key distribution and derivation (KDF), RSA, and SHA-256 implementations. A complete secure communication program using RSA and AES-256. A glossary of commonly used cryptography terms.

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ZELFBOUW LIPO-SUPERCHARGER KITvan prototype tot productie ELEKTOR @ 60gedachten bij zestig jaar elektronica SIGLENT SDM3045X TAFELMULTIMETER DC-STROOMKLEMHall-sensor + ferrietkern + Arduino SOLDEERSTATION 2021makkelijk om te bouwen! KENNISMAKING MET DE PARALLAX PROPELLER 2 (DEEL 2)de ontwikkelomgeving en de code WIFI VOOR DE LORA SWITCHgeïntegreerd in Home Assistant met ESPHome GEEN ANGST VOOR DE CELLULAIRE MODULE! HOUD DE TIJD BIJ MET ESP32 EN TOGGLwerken met de M5Stack KENNISMAKING MET HET RASPBERRY PI PICO-BOARD EN DE RP2040 MICROPYTHON VOOR MICROCONTROLLERStechnieken voor kleine displays 12–200 V DC/DC-CONVERTERvoor buizenversterkers WARMTEZOEKERde Seek Shot Pro warmtebeeldcamera OBJECTGEORIËNTEERD PROGRAMMERENeen korte inleiding met C++ OOST WEST LAB BEST...waar Kurt Diedrich synthesizers bouwt JAVA OP DE RASPBERRY PIdeel 1: GPIO’s DIP-SCHAKELAARSvreemde onderdelen INTERACTIEFcorrecties & updates || brieven van lezers WIENS PRODUCT IS HET EIGENLIJK?recht-op-reparatie beweging laat van zich horen UIT HET LEVEN GEGREPENhet grote blunderboek MICRO-PROFESSORassembleertaal leren op een Z80 ALLE BEGIN......hoeft niet zo moeilijk te zijn – zelfs als het om condensatoren gaat HEXADOKUThe Original Elektorized Sudoku

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The Siglent SPD4121X is a 4-channel DC Linear Programmable Power Supply equipped with a 4.3-inch TFT-LCD display, friendly human-machine interface, and excellent performance indicators. Real-time waveform display provides engineers with an informative user interface. SPD4121X offers a total output power of 285 W with a resolution of 1 mV/1 mA. The maximum voltage and current for each channel are as follows: CH1: 15 V/1.5 A CH2: 12 V/10 A CH3: 12 V/10 A CH4: 15 V/1.5 A Features Rated output power: 285 W Rated voltage: 32 V, 12 V, 30 V Up to four high-precision power supplies with independent controllable outputs, supporting CH2 and CH3 series and parallel connections Clear graphical interface with waveform and timer display modes 5-digit voltage and current display with minimum resolution of 1 mV, 1 mA Fast output response time: <50us The high current channel support remote voltage compensation sense function. The maximum compensation voltage is 0.6 V Overvoltage protection and overcurrent protection or safe and accurate operation Equipped with a 4.3-inch TFT-LCD display (480 x 272 resolution) USB and LAN standard communication USB-GPIB module is optional Excellent channel density with up to 4 channels in a 3U half rack package Internal data storage for setups and parameters Embedded Web Server with instrument communication that doesn’t require software installation Fully SCPI programming command set support as well as a LabView driver for remote control and system automation Specifications SPD4323X SPD4121X SPD4306X Channel Output CH1: Voltage 0 to 6 V Current 0 to 3.2 ACH2: Voltage 0 to 32 V Current 0 to 3.2 ACH3: Voltage 0 to 32 V Current 0 to 3.2 ACH4: Voltage 0 to 6 V Current 0 to 3.2 A CH1: Voltage 0 to 15 V Current 0 to 1.5 ACH2: Voltage 0 to 12 V Current 0 to 10 ACH3: Voltage 0 to 12 V Current 0 to 10 ACH4: Voltage 0 to 15 V Current 0 to 1.5 A CH1: Voltage 0 to 15 V Current 0 to 1.5 ACH2: Voltage 0 to 30 V Current 0 to 6 ACH3: Voltage 0 to 30 V Current 0 to 6 ACH4: Voltage 0 to 15 V Current 0 to 1 A Resolution 1 mV, 1 mA 1 mV, 1 mA 1 mV, 1 mA Setting Accuracy Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Readback Accuracy Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Display 4.3" TFT-LCD 5-digit voltage and current display 4.3" TFT-LCD 5-digit voltage and current display 4.3" TFT-LCD 5-digit voltage and current display Output power 240 W 285 W 400 W Included 1x Siglent SPD4121X Power Supply 1x Power cord (EU) 1x Output test cord (3 A) 1x USB cable 1x Quick start guide Downloads Datasheet Manual Quick start

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