Secret-Knock Gumball Machine
Make a cute candy vending machine that only dispenses treats when you knock the secret rhythm on its front panel.
Wire cutter/stripper
Audio-Enhanced Touch Sensors to Help the Visually Impaired
Add touch sensors which trigger audio tags. This helps visually impaired people find their way around a new device. Or you could make an educational toy to help Junior learn what things are called. Or you could add a warning to ‘keep off’ your stuff! Or…. Please note: I copied and modified the Android code […]
Upgraded Indestructible LED Lanterns
The original LED lanterns were featured in MAKE: Magazine, issue 30. When I first saw the article, I thought that they could only be used once, as they would have to be glued shut. When I read it, I realized that they were sealed with tape, and could therefore be opened, but not before I […]
Simple Electric Motor
Everybody thinks that you could just buy a motor at a hobby shop, but here’s how to make your own, preferably for science fairs.
Small Amp
This was one of the first circuits that got me into making. It’s very simple and can be used to amplify audio output (mp3 player, computer, etc.) as well as electric guitars.
