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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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Master digital electronics – the hands-on way! This bundle includes the book Learning Digital Electronics, featuring 20+ practical projects in Logic and Circuit design, as well as a 100-piece kit – so you can start building logic circuits, counters, displays, and more right away. Learning Digital Electronics (Book) This book is a practical guide to digital electronics, covering the essential components of modern digital systems: number systems, logic gates, Boolean algebra, combinational and sequential logic, and more. Through more than 20 structured projects, you’ll design and build digital systems using real-world components such as logic gates, multiplexers, decoders, flip-flops, counters, and shift registers. The projects range from basic LED logic circuits to digital locks, display systems, traffic light controllers, and timing-based designs. Selected projects introduce the use of tools such as CircuitVerse for circuit simulation, while several designs make use of 74HC-series logic devices, commonly used in digital hardware prototyping. Inside, you’ll find: Clear coverage of number systems and binary arithmetic Logic gate fundamentals and universal gate implementations Step-by-step projects using flip-flops, counters, and registers Real-world design with 74HC-series logic chips Techniques for designing combinational and sequential systems This book takes a design-first, application-driven approach to digital electronics—built around working circuits, tested logic, and hands-on experimentation. Learning Digital Electronics (Kit) This kit has been specially developed to complement the book "Learning Digital Electronics". Since all necessary components are included, you can complete every practical project in the book directly. Kit contents 2x 74HC08 AND gate chip 2x 74HC00 NAND gate chip 1x 74HC86 XOR gate chip 1x 555 timer chip 1x 74HC161 counter chip 1x 74HC164 shift register 1x CD4511 7-segment decoder 1x CD4027 JK flip-flop 1x BC337 NPN transistor 1x KPS-5161 7-segment common-cathode display 1x Light dependent resistor (LDR) 4x 10 KΩ resistors 8x 1 KΩ resistor 2x 47 KΩ resistors 1x 100 KΩ resistor 4x 2.7 KΩ resistors 1x 5.6 KΩ resistor 1x 150 KΩ resistor 1x 10 μF capacitor 2x 0.01 μF capacitor 2x 100 nF capacitor 8x Small red LED 1x Small green LED 1x Small orange LED 4x Pushbutton switches 1x Active buzzer 1x Battery holder for 3x AA batteries (batteries not included) 1x Breadboard 40x Male-to-male jumper wires (length: 200 mm)

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This bundle contains the popular Elektor Sand Clock for Raspberry Pi Pico and the new Elektor Laser Head Upgrade, offering even more options for displaying the time. Not only can you "engrave" the current time in sand, you can now alternatively write it on a glow-in-the-dark foil or create green drawings. Contents of the bundle Elektor Sand Clock for Raspberry Pi Pico (normal price: €50) Elektor Laser Head Upgrade for Sand Clock (normal price: €35) Elektor Sand Clock for Raspberry Pi (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 Elektor Laser Head Upgrade for Sand Clock The new Elektor Laser Head transforms the Sand Clock into a clock that writes the time on glow-in-the-dark film instead of sand. In addition to displaying the time, it can also be used to create ephemeral drawings. The 5 mW laser pointer, with a wavelength of 405 nm, produces bright green drawings on the glow-in-the-dark film. For best results, use the kit in a dimly lit room. Warning: Never look directly into the laser beam! The kit includes all the necessary components, but soldering three wires is required. Note: This kit is also compatible with the original Arduino-based Sand Clock from 2017. For more details, see Elektor Magazine 1-2/2017 and Elektor Magazine 1-2/2018.

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The FNIRSI LC1020E High-Precision LCR Meter with ESR tester is a portable and intelligent solution for testing electronic components, offering a basic accuracy of up to 0.3%. It is ideal for engineers, technicians, and makers. The device supports L/Q, C/D, and R/D measurements using both series and parallel equivalent circuit models, and features a 2.8-inch TFT color display. With preset thresholds and audio-visual alerts, it enables fast pass/fail evaluation, making it perfect for batch testing and quality control. Supporting test frequencies up to 100 kHz, it is well suited for high-frequency analysis of inductors, capacitors, and resistors. Features ±0.05% accuracy with 4.5-digit resolution Automatic R/L/C identification for fast measurements 5 test frequencies (100 Hz–100 kHz) & 3 voltage levels (0.1–0.6 V) Dual display: L/C/R/Z + X/D/Q/θ/ESR Sorting mode & bias voltage for batch testing Dual ports (3-/5-terminal) with 4-wire Kelvin support Data hold & logging for efficient workflow Compact, rechargeable (3000 mAh) – ideal for lab & field use Specifications General Test Frequency 100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz Basic Accuracy 0.3% Display 2.8-inch TFT LCD display Display Digits Main Parameter: 4.5 digits Secondary Parameter: 4.5 digits Measurement Parameters Main Parameters: AUTO/R/C/L/Z Secondary Parameters: X/D/Q/θ/ESR Measurement Range L: 0-100H C: 0-100mF R: 0-10M Internal Bias 0.0 V, 0.5 V Test Level 0.1 V, 0.3 V, 0.6 V Calibration Functions Open circuit calibration, Short circuit calibration Comparison Function Used to calculate the relative error between the component measurement value and the nominal value, displayed as a percentage, and provides filtering results. Nominal values and tolerance can be set, with tolerance range adjustable from 0.1% to 99.9% Function Record Checks if the measured component data meets the set nominal value and tolerance, recording the number of successful and failed measurements Test Terminal Configuration Three-terminal, Five-terminal Output Impedance 100Ω Interface USB-C (Virtual serial port) Others Language settings, Screen brightness, Sound settings, Auto power-off, Calibration settings, System information Battery 3000 mAh Lithium battery Dimensions 18.5 x 8.5 x 3.5 cm Weight 680 g Capacitance (C) Range: 1mF-100mF 100 Hz: 5% ±5 digits 1 kHz: 3% ±5 digits 10 kHz: / 100 kHz: / Range: 1uF-1mF 100 Hz: 1% ±4 digits 1 kHz: 0.5% ±5 digits 10 kHz: 2% ±5 digits 100 kHz: 3% ±4 digits Range: 1nF-1uF 100 Hz: / 1 kHz: 0.3% ±2 digits 10 kHz: 0.4% ±2 digits 100 kHz: 1% ±4 digits Range: 1pF-1nF 100 Hz: / 1 kHz: 2% ±2 digits 10 kHz: 1.5% ±2 digits 100 kHz: 2% ±4 digits Inductance (L) Range: 1H-100H 100 Hz: 2% ±5 digits 1 kHz: 2% ±5 digits 10 kHz: / 100 kHz: / Range: 1mH-1H 100 Hz: 0.4% ±5 digits 1 kHz: 0.3% ±2 digits 10 kHz: 0.4% ±3 digits 100 kHz: 2.5% ±5 digits Range: 10uH-1mH 100 Hz: 3% ±5 digits 1 kHz: 0.5% ±4 digits 10 kHz: 0.5% ±3 digits 100 kHz: 1.5% ±5 digits Range: 1uH-10uH 100 Hz: / 1 kHz: 2% ±5 digits 10 kHz: 2% ±5 digits 100 kHz: 4% ±5 digits Resistance (R) Range: 1MΩ-10MΩ 100 Hz: 5% ±4 digits 1 kHz: 3% ±3 digits 10 kHz: / 100 kHz: / Range: 1KΩ-1MΩ 100 Hz: 0.4% ±4 digits 1 kHz: 0.2% ±2 digits 10 kHz: 0.3% ±3 digits 100 kHz: 0.6% ±5 digits Range: 1Ω-1KΩ 100 Hz: 1.5% ±4 digits 1 kHz: 0.3% ±2 digits 10 kHz: 0.3% ±3 digits 100 kHz: 0.6% ±5 digits Range: 10mΩ-1Ω 100 Hz: 4% ±4 digits 1 kHz: 2% ±5 digits 10 kHz: 2% ±5 digits 100 kHz: 5% ±5 digits Included 1x FNIRSI LC1020E LCR Meter 1x Kelvin Test Clip 2x Test Leads (1x black, 1x red) 1x Shorting Plate 1x USB-C Cable 1x Manual Downloads Manual Firmware V1.1

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The FNIRSI 2D15P is a compact 3-in-1 test tool combining a 2-channel digital oscilloscope, True RMS multimeter, and waveform generator in one device. With a 4.3" capacitive touchscreen, 100 MHz bandwidth, 500 MSa/s sampling rate, and up to 1,200 fps capture speed, it’s ideal for fast troubleshooting, signal analysis, and electronics testing. Features Dual-Channel Input (100 MHz single-channel, 50 MHz dual-channel operation) Selectable Memory Depths 20 MHz Bandwidth Limit Grayscale & Color Temperature Visualization Math Operations (Add, Subtract, Multiply, Divide, etc.) XY Mode & Infinite Persistence Cursor Function & 13 Auto Measurements Auto / Normal / Single Trigger Modes True RMS Multimeter (19,999 Counts) 10 MHz DDS Signal Generator Specifications General Display 4.3" IPS Capacitive Touchscreen Operation Touch + Knob + Physical Buttons Charging USB-C (12 V/1 A fast charging) Battery 5000 mAh Lithium battery Dimensions 19.6 x 12.9 x 5.7 cm Weight 1.1 kg Oscilloscope Channels 2 Analog Bandwidth 100 MHz Sample Rate 500 MSa/s Memory Depth 10K, 100K, 1M Input Impedance 1 MΩ Timebase Range 5ns - 50s Vertical Sensitivity 10 mV - 10 V/div Max Input Voltage 800 V (x10 Probe) Trigger Mode Auto, Normal, Single Trigger Type Rising, Falling, Both Edges Coupling AC/DC Persistence min / 2s / 5s / 10s / 20s / 50s / ∞ Math Operations Yes Waveform Capture Yes Waveform Export Yes Cursor Measurement Yes Multimeter DC Voltage 1.9999V / 19.999V / 199.99V / 1000V AC Voltage 1.9999V / 19.999V / 199.99V / 750.0V DC Current 19.999mA / 199.99mA / 1.9999A / 9.999A AC Current 19.999mA / 199.99mA / 1.9999A / 9.999A Resistance 19.999MΩ / 1.9999MΩ / 199.99KΩ / 19.999KΩ / 1.9999KΩ / 199.99Ω Capacitance 999.9uF / 99.99uF / 9.999uF / 999.9nF / 99.99nF / 9.999nF / 9.999mF / 99.99mF Diode Yes Continuity Yes Signal Generator Channels 1 Frequency 0–10 MHz Amplitude 0.1–3.0 Vpp Duty Cycle 0–100% Included 1x FNIRSI 2D15P Oscilloscope 2x P6100 Oscilloscope Probes 1x Multimeter Probe 1x Alligator Clip Probe 1x USB Data Cable 1x Manual Downloads Manual Firmware V2.7.0.7

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The FNIRSI DLA Series combines high-performance USB 3.0 logic analysis with flexible multi-channel signal capture for debugging and analyzing digital circuits and embedded systems. The series is available in two versions: the DLA-16 Plus with 16 digital channels and the DLA-32 Plus with 32 digital channels. Both models offer sampling rates of up to 1 GSa/s, 4 Gbit of onboard memory, and support for 120+ protocol decoders. With Buffer, Stream, and Roll acquisition modes, they are suitable for both high-speed signal analysis and long-term monitoring. Choose the DLA-16 Plus for higher sampling rates when using all channels, or the DLA-32 Plus when you need more channels and advanced serial and parallel triggering. Features Available with 16 or 32 digital input channels Up to 1 GSa/s sampling rate DLA-16 Plus: up to 500 MSa/s with all 16 channels DLA-32 Plus: up to 250 MSa/s with all 32 channels 4 Gbit onboard memory High-speed USB 3.0 interface Acquisition modes: Buffer, Stream, and Roll Support for 120+ protocol decoders Advanced triggering options 4 PWM outputs with 1 Hz–20 MHz frequency range CSV and BIN data export Specifications DLA-16 Plus DLA-32 Plus Digital Channels 16 32 Max. Sampling Rate 1 GSa/s Sampling Rate (1 Channel) 1 GSa/s Sampling Rate (8 Channels) 1 GSa/s Max. Buffer Sampling 16 CH @ 500 MSa/s 32 CH @ 250 MSa/s Max. Stream Sampling 16 CH @ 125 MSa/s 32 CH @ 50 MSa/s Hardware Memory 4 Gbit Interface USB 3.0 / USB-C Max. USB Transfer Rate 5 Gbit/s Acquisition Modes Buffer / Stream / Roll Protocol Decoders 120+ Custom Protocol Support Yes Trigger Modes Rising Edge, Falling Edge, High, Low, Any Edge Advanced Trigger Standard Triggering Serial and Parallel Parallel Trigger Stages – Up to 16 PWM Outputs 4 PWM Output Voltage 3.3 V PWM Frequency 1 Hz–20 MHz Data Export CSV, BIN Dimensions 90 x 81 x 11.5 mm Included 1x FNIRSI DLA-16/32 Plus Logic Analyzer 4 Sets x 5 Shielded Cables 18x Mini IC Test Hooks (High Configuration Version) 1x USB 3.0 Data Cable 10x IC Test Hooks 1x Transparent Storage Case for Test Hooks 1x Storage Bag 1x Manual Downloads Manual

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2 Channels • 350 MHz • 1 GSa/s • 50,000 wfm/s • 7 inch Touchscreen The FNIRSI DPOS350P is a sleek 4-in-1 powerhouse in tablet form! This compact and portable device packs serious functionality: it combines a 2-channel oscilloscope (350 MHz), a signal generator (50 MHz), a frequency response analyzer (50 MHz), and a spectrum analyzer (200 kHz–350 MHz) – all in one unit. Whether you're in R&D, troubleshooting, or field testing, the DPOS350P delivers the tools you need to measure, generate, analyze, and visualize electronic signals with precision and clarity. Its responsive high-resolution touchscreen and intuitive controls make signal analysis fast, flexible and efficient. Features Powerful Multi-Function Integration 350 MHz 2-channel oscilloscope with 1 GSa/s real-time sampling 50 MHz signal generator with 14 standard + custom waveforms Spectrum analyzer (200 kHz–350 MHz): Perfect for EMI, RF & HF testing Frequency response analyzer (FRA) up to 50 MHz High-Performance Waveform Capture 50,000 wfm/s refresh rate for real-time signal clarity 350 MHz bandwidth (single-channel mode) Detects rare and low-probability anomalies Crisp Display & Smooth Operation 7" IPS touchscreen (1024 x 600 resolution) Switch between grayscale and color temperature display Easy to operate in various test environments Reliable, Protected & Fast-Charging High-voltage protection up to 400 V Fast charging with QC 18 W (full charge in 2 hours) Built for stable long-term operation Data Storage & Export Save up to 500 waveform records + 90 screenshots USB export for easy reporting and offline analysis Specifications General Display 7 inch (IPS full viewing angle) Resolution 1024 x 600 pixels Interaction mode Capacitive touch screen Total power consumption 10 W Power-on configuration 5 presets Charging QC 18 W, 12 V/1.5 A (USB-C) Battery 3.7 V, 8000 mAh lithium battery Battery life approx. 3 hours in operation, 5 hours standby Heat dissipation Air cooling Expansion interface USB data port Automatic shutdown 15~60 minutes / off Firmware upgrade Support .iso image upgrade Languages English / Portuguese / Russian / Chinese Dimensions 190 x 128 x 37 mm Oscilloscope Analog channels 2 Analog bandwidth 350 MHz Rise time 1ns Real-time sampling rate 1 GSa/s Memory depth 60 Kpts Input impedance 1 MΩ / 14PF Time base range 5ns ~ 50s Roll time base 50ms ~ 50s Vertical sensitivity 2 mV ~ 20 V (1X) Vertical range 16 mV ~ 160 V (1X) DC accuracy ±2% Time accuracy ±0.01% Input coupling DC / AC Probe attenuation 1X / 10X / 100X Hardware bandwidth limit 150M / 20M High resolution mode 8bit ~ 16bit Parameter measurements 12 types Cursor measurement Time, period, frequency, level, voltage Trigger detection Digital trigger Trigger channel CH1 / CH2 Trigger mode Auto / Single / Normal Trigger edge Rising edge / Falling edge Trigger suppression L1 ~ L3 Trigger level Manual / automatic 10% ~ 90% Screenshot storage 90 pictures Waveform storage 500 groups Background grid Display / hide Waveform movement Coarse adjustment / fine adjustment Overvoltage protection Withstand voltage 400 V Waveform brightness Adjustable Simple FFT display Yes Digital fluorescence Yes Color temperature display Yes X-Y mode Yes ZOOM time base Yes One-key automatic adjustment Yes One-key return to zero Yes Data browser Yes Signal Generator Waveform types 14 standard functions + captured waveform Frequency 0~50 MHz (sine wave only, other waveforms up to 10M/5M/3M) Amplitude 0~5 VPP Offset -2.5 V ~ +2.5V Duty cycle 0.1~99.9% Frequency resolution 1 Hz Amplitude resolution 1 mV Offset resolution 1 mV Duty cycle resolution 0.1% Customizable captured waveform 500 groups Frequency Response Analyzer (FRA) Excitation signal frequency 100 Hz ~ 50 MHz Excitation signal amplitude 0~5 VPP Excitation signal offset -2.5V ~ +2.5V Excitation frequency count 20~500 Cursor measurement Frequency / gain / phase Operating mode Single / cyclic System calibration Yes Spectrum Analyzer Conversion method FFT FFT length 4K ~ 32K Frequency range 200 KHz ~ 350 MHz Level range -60 dBmV ~ +260 dBmV Cursor measurement Frequency / amplitude Marking parameter Maximum energy harmonic Waterfall chart Yes 3D waterfall chart Yes Automatic adjustment Yes System calibration Yes Included 1x FNIRSI DPOS350P Oscilloscope (4-in-1) 2x 350 MHz Probes 1x QC 18 W Fast Charger (EU) 1x USB-C Cable 1x Alligator Clip 1x Storage Bag 1x Manual Downloads Manual Firmware

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The Elektor Laser Head transforms the Elektor Sand Clock into a clock that writes the time on glow-in-the-dark film instead of sand. In addition to displaying the time, it can also be used to create ephemeral drawings. The 5 mW laser pointer, with a wavelength of 405 nm, produces bright green drawings on the glow-in-the-dark film. For best results, use the kit in a dimly lit room. Warning: Never look directly into the laser beam! The kit includes all the necessary components, but soldering three wires is required. Note: This kit is also compatible with the original Arduino-based Sand Clock from 2017. For more details, see Elektor Magazine 1-2/2017 and Elektor Magazine 1-2/2018.

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Over 40 Fully Tested ESP32 Projects Using Arduino IDE and the LVGL Graphics Library This bundle includes the ESP32 Cheap Yellow Display (CYD) – a compact development board combining a standard ESP32 microcontroller with a 320x240 pixel TFT color display. The board also features multiple connectors for GPIO, serial communication (TX/RX), power, and ground. The built-in display is a major advantage, allowing users to create complex, graphics-based projects without the need for external LCDs or displays. The accompanying book introduces the CYD board's hardware and on-board connectors in detail. It provides a range of beginner to intermediate-level projects developed using the popular Arduino IDE 2.0. Both basic graphics functions and the powerful LVGL graphics library are covered, with practical projects illustrating each approach. All included projects have been fully tested and are ready to use. The book provides block diagrams, circuit schematics, complete code listings, and step-by-step explanations. With the LVGL library, readers can create modern, full-color graphical interfaces using widgets such as buttons, labels, sliders, calendars, keyboards, charts, tables, menus, animations, and more. ESP32 Cheap Yellow Display Board This development board (also known as "Cheap Yellow Display") is powered by the ESP-WROOM-32, a dual-core MCU with integrated Wi-Fi and Bluetooth capabilities. It operates at a main frequency of up to 240 MHz, with 520 KB SRAM, 448 KBROM, and a 4 MB Flash memory. The board features a 2.8-inch display with a resolution of 240x320 and resistive touch. Furthermore, the board includes a backlight control circuit, touch control circuit, speaker drive circuit, photosensitive circuit, and RGB-LED control circuit. It also provides a TF card slot, serial interface, DHT11 temperature and humidity sensor interface, and additional IO ports. The module supports development in Arduino IDE, ESP-IDE, MicroPython, and Mixly. Applications Image transmission for Smart Home device Wireless monitoring Smart agriculture QR wireless recognition Wireless positioning system signal And other IoT applications Specifications Microcontroller ESP-WROOM-32 (Dual-core MCU with integrated Wi-Fi and Bluetooth) Frequency Up to 240 MHz (computing power is up to 600 DMIPS) SRAM 520 KB ROM 448 KB Flash 4 MB Operating voltage 5 V Power consumption approx. 115 mA Display 2.8-inch color TFT screen (240 x 320) Touch Resistive Touch Driver chip ILI9341 Dimensions 50 x 86 mm Weight 50 g Downloads GitHub This bundle contains: The ESP32 Cheap Yellow Display Book (normal price: €35) ESP32 Cheap Yellow Display Board (normal price: €25) 1x ESP32 Dev Board with 2.8" Display and acrylic Shell 1x Touch pen 1x Connector cable 1x USB cable

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Highlights Frequency: 1.5 GHz DANL: -155 dBm Phase Noise: -80 dBc/Hz RBW: 10 Hz Tracking Generator Specifications All-Digital IF Technology Frequency Range from 9 kHz up to 1.5 GHz Min. -161 dBm Displayed Average Noise Level (Typ.) Min. < -98 dBc/Hz @ 10 kHz Offset Phase Noise Level Measurement Uncertainty < 0.8 dB 10 Hz Minimum Resolution Bandwidth Up to 1.5 GHz Tracking Generator Advanced Measurement Functions (Opt.) EMI Filter & Quasi-Peak Detector Kit (Opt.) VSWR Measurement Kit (Opt.) PC Software (Opt.) Optional RF TX/RX Training Kit Optional RF Accessories (Cable, Adaptor, Attenuator, Bridge ...) Complete Connectivity: LAN (LXI), USB Host & Device, GPIB (Opt.) 8 Inch WVGA (800x480) Display Compact Size, Light Weight Design Included 1x Rigol DSA815-TG Spectrum Analyzer 1x Power cord 1x USB cable

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