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Digital Load for High-Current Testing
From Necessity to Innovation
Vocal Remover
Instant Karaoke Circuit
Audio A/B Selector With Gain Control
Switches from Microphone to Line Inputs
Better Charging for the LIR2032
Be Kind to Your Coin Cells
Touch Sensing Made Simple
A DIY Guide for Any Microcontroller
Universal Infrared Remote Switch
A New Life for Old Remotes
Microcontroller-Powered Moo Box
Making Playful Sounds With a Microcontroller
USB Battery Interface
Powering Low-Draw Devices With Power Banks
A “Stay Alive” Solution
Small Class-A Audio Amplifier With Current Output
Drive Speakers with Current Instead of Voltage
Pseudo-Balanced Module
High CMRR with Unbalanced Audio Links
Ni-MH Cells Automatic Charger
Refill All Your Battery Packs in One Go!
Thyristor-Based Power Supply Protection
Fingerprint Sensor Switch
A Useful Proof-of-Identity Device
DC-DC 3-A Power Converter
Upgrade Your Fixed-Voltage Sources
Remote Water Heater Monitor
Voltage and Current Detection for AC Lines
Attenuators for Audio Signals (1)
Adjustable Via Jumpers
Pimp My Car Battery Charger (Part 1)
Don’t Throw It Away, Mod It!
A Board for the Blue One
PCB for Alps Motorized Potentiometer with Feedback
50-Hz Reference from 60-Hz Mains Voltage
How to Use 50-Hz Electronics in 60-Hz Environments
Digital Isolators
Realizing Galvanic Isolation Easily
Compact 12-W Hi-Fi Mono Amplifier
Small But Powerful
LM386 Ramp Generator
Three-Phase Generator
With Raspberry Pi Pico
Door Opener for the Musically Talented
Elektor Classic: Surf Synthesizer
Ocean Watersports Background Sound Generator (OWBSG)
Pimp my Car Battery Charger (Part 2)
Don’t Throw It Away, Mod It!
Lamp Current Monitor
With a Raspberry Pi Pico
Infrared Telegraphy
Fnirsi SWM-10
Repair Battery Packs With This Portable Intelligent Spot Welding Machine
Stereo Audio Codec for the ESP32 and Co.
No Need to Be Afraid of Audio Measurement Technology
Tin Soldering Techniques
Make Them Well Right Away!
Attenuators for Audio Signals (2)
Switching Via Relays
USB-C Power
Drawing Power from USB-C Power Adapters
Three Circuits with Two and Three Counter ICs
4017 ICs Working Together
Active Components – The Diode
A Timer For Ultra-Long Delays
Set It, and Forget It!
Jack In and Jack Out
A Useful Insert Option for Audio Circuits
Power an ESP32 from a Single Li-ion Cell
Hexadoku

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