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Build a 4 X AA USB Altoids Battery
3D Printing Class
Solar powered pump for water barrels
Create Your Own Solar Powered Raspberry Pi Weather Station (Updated)
Building your own CNC router/milling machine
Little trick for desoldering through hole components
Raspberry Pi Portable Games Console
Raspberry Pi Solar Weather Station
No irrigation raised bed gardening system (Hugelkultur)
Edge 3D Printer 1.0 - an affordable open source 3D printer!
Touch-Sensitive Musical Painting
Better than Reese's Peanut Butter Cups
3D Silhouette Light Box
The Word Clock - Arduino version
Arduino Button Tutorial
Charlieplexing the Arduino
How to drive a lot of LEDs from a few microcontroller pins.
My Top Ten Most Useful Breadboard Tips and Tricks
How to access 5 buttons through 1 Arduino input
Make your own smart watch
Salvage surface mount components