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IR (Infrared) Security Alarm System
Introduction to the 555 timer
Temperature controlled water heater
A beginner's guide to Arduino
Troubleshoot your car battery with ATtiny.
12 Volt Battery Generator
High voltage power supply for Nixies, CFL, Neon-Glow-Bulbs etc. for my steampunk objects
Let's learn about Super Capacitors! (A Practical Guide To Super Capacitors)
All You Need To Know About a Relays
Complete Guide for Tech Beginners
Take apart a Compact Fluorescent Bulb
Reuse Electronic Parts - 7 Segment Display Based on PT6964
My Car Assistant (Embebbed Car Automation Computer)!
How to build 100 watt 12v DC to 220v AC inverter circuit using EasyEDA
220V HOMEMADE PORTABLE POWER INVERTER
Simple Inverter. 12v DC to 220v AC.
Cheap OBD2 communications on K-line (ISO 9141-2 and ISO 14230-4)
How to Make a Simple, Portable Audio Amplifier (LM 386)
DIY 2.1 Portable Speaker with USB , AUX , TF , Bluetooth and remote control
DIY Dynamic Microphone w/ pre-amp
Simple DIY Audio Amplifier Lm386
30 minute USB microscope
Build a USB Digital Microscope in 60min and 15$
USB Heater (or How to Upgrade Your Coffee Cup)
Computer control of AC devices
$10 Cube-A-Scope, DIY Cheap Boroscope
Hack that holy USB cable!
Human Powered Phone charger
Making spiral wire wrap tube for cable organizing
Flight-case Toolbox and Workstation
Text your coffee maker!