Hobby Projects - Insulation tester, LED Circuits, Meters.

Monday, May 21, 2012

Grathio Labs of Steve Hoefer

Steve Hoefer, the main brain behind Grathio Labs. A freelance problem solver and writer. Active in the Open Source software and hardware.

Grathio Labs of Steve Hoefer

The Secret Knock Detecting Lock unlocks your door when it detects the correct knocking sequence.

Secret Knock Detecting Lock

Secret Knock Detecting Lock