Tweet-a-watt was designed for the Core77 Green Gadgets competition, but Torrone intends to release the source, schematics and the idea as an open-source hardware project.

Power meters like the Kill-A-Watt are great for keeping track of ... I now have a working setup where the energy meter is completely wireless with an Arduino mini pro 3,3V and a nRF24L01 ...

After a request from one of his friends, [Mastro Gippo] managed to put together a talking multimeter to be used by blind persons working in electronics. He wanted a feature-rich meter that had seri… ...

Try that with a watt meter from the hardware store. Project: Electromagnetic Interference Detector. Rough Cost: $42. Time Commitment: About 1 hour. ... To use Arduino, first install the free, ...