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Homemade Emergency LED Light Bulb
Cheap Voltage Regulated Joule Thief power supply/charger
Joule Thief Battery Charger
DIY Wireless Charger + NFC Dock For Your Car
Wireless electricity transmission circuit
Cracking the Combination to a Combo Lock Using a Shim and Numbers
HACK YOUR OWN BLUETOOTH HEADSET FOR CHEAP
Power Logic Probe
Center of gravity 'Fork Dragon'
Electricity out of Penny
Book Shelve Stereo Amplifiers - DIY
RFID Controlled Door
Wiring an adjustable voltage regulator
Altoids USB Battery/Solar charger for iPhone and iPod