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Tiny Solar Supply
Sunlight In, 3.3 V Out
Solid-State Stereo Audio Switch
Free of Clicks and Moving Parts
Large RGB Digit
With Through-Hole WS2812 LEDs
Microphone Preamplifier with 48-V Phantom Power Distribution
Great for Podcasting and Pro Audio
Square Wave Generators with Duty Cycle and Frequency Controls
Simple Circuits with CMOS and TTL ICs
Simple Dynamic Compressor
With Soft Control and Warm Sound
Simple Electronic Lock
Active Rectifier
A solution or 2…40 V at up to 3 A with Reverse Current Suppression
On / Off Switching System for Active Boxes
Unbalanced/Balanced Converter
With RFI Filter and DC Protection
2023: An AI Odyssey
Where Did It Come From? Where Is It Going?
Speed Controller for Fan or Ventilator
With Manual and Thermostat Modes
The Latest from Arduino Project Hub
New Projects from the Community
Power Overload Monitor
Monitor Power Lines for Excessive Current
Blink in the Dark Without Transistors
An Oscillator with Only Two-Terminal Parts
Morse Code Generator
Use It as Beacon or Learning Device!
Programmable Video DAC
Handles Any Format up to RGB888
A T(eeny) Tiny Piano
Without Moving Parts
Dual Dice without MCU
Dual Dice on a Single PCB – Plus Some Design Tricks
Electronic Scarecrow
Circuits to Amuse, Inspire, and Amaze
LC-LP-HA Thermometer
Accurate Measurements and a Binary Display
THD Generator
Generating Distortion on Purpose
Thyristor-Based Overtemperature Indicator
Electronic Components Used Unconventionally
PTC Fuse Flip-Flop
Funny Bird
A Chirping Elektor Classic
Neon Lamp with a Microcontroller
Temperature-Stabilized IC Current Source
Neutralizing the Temperature Drift of Integrated Current Sources
Second-Order Adjustable Treble Boost
A Special Hearing Aid for the Elderly
Edwin Comes Home
A Look Back After 53 Years
One-Armed Bandit
A Simple, Fun, Nostalgic, and Educational Elektor Classic!
Simple Digitally Controlled Variable Resistor
Water Leak Protection
Safeguard and Alarm for Water Leaks
Eco-Timer with Auto-Shutdown
Needs 0.0 mW in Off Mode!
ChatGPT and Arduino
ZD MeterMeasuring Z Voltages of Z Diodes ≤ 100 V
Servo Tester
ESP32 Windows Controller with Free Software
Analog and Mixed-Signal ICs by Microchip
Low-Consumption Power Management and Signal Processing
Interface Standards
Filter and Surge Protection for the I²C Bus
Li-Ion Battery Monitor
Residual Charge Indicator Provides Visual Feedback
PS/2 Mouse As Rotary Encoder (and More…)
Simple Twilight Switch
for Retrofitting Lamps or Installations
Water Pump Controller
Prepare Yourself Against Rising Water Levels
Solar-Powered Christmas FM Radio Ball
All You Want for Christmas Is This
Vibration Sensor with Relay
Tap or Shake to Switch On
Continuity Tester
Sensitive and Unintrusive
Power On/Off with a Pushbutton
Mini-Drill Power Control 2023
A Revision of a Design from 1980
Digital Vibration Sensor
Turn Vibrations into Precisely Timed Pulses
Reverse-Polarity Protection with Low Voltage Drop
A Low-Cost Frequency Standard
Tiny DCF77 Simulator
An Accurate Fake-Time Standard
The Lilygo T-PicoC3
Combines RP2040 and ESP32-C3 with Full Color-TFT Display

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