Halloween is a good time to invest in a new toothbrush, but before you throw out that old electric toothbrush, why not use it to give your Halloween decorations a little life by turning them into super lo-fi bristlebots?
Using an ultrasonic range sensor we can sense how far away objects are.
Make Halloween props on a table move without anything touching them.
Swivels and a weight give flexibility and stability to this contemporary design. Conventional mobiles are mostly made with hook-into-loop connections, which restrict movement. This mobile uses swivels, which allow the parts to rotate full circle, independent from each other.
What do you do with a bunch of small fans? You combine them into one big fan.
Build a light theremin into a musical noisemaker with Weekend Projects. This project combines a 555 timer, light-dependent resistor, LED, speaker, and some basic components into a battery-powered synth that's easy to assemble and fun to play.
As a young toddler, my son has zero interest in “baby” rattles but isn’t impressed by an Etch-A-Sketch or coloring yet.
This hack is easy and safe — use a 9V battery, vinegar, and salt to permanently etch designs on pots, pans, or any other metal surface you'd like to mark.
I modified a wireless doorbell system to turn on a light in addition to playing a tone.
Use a Raspberry Pi, camera, and free software to make a lockbox that opens only when it sees your mug.
Ever been looking for your keys, and wanted to call them, before you realize that they are hideously analog pieces of metal?
Turn a $35 mini-computer into a feature-rich language translator that not only supports voice recognition and native speaker playback, but is also capable of translating between thousands of language pairs.