Technology

Linux based Qtopia Greenphone

Linux based Qtopia Greenphone

Well, I’m really hoping this takes off – it’s 2006 and the “advanced” phones are still pretty crummy in one way or another – Trolltech has just announced a new GSM/GPRS Linux based phone platform / SDK – “Qtopia Greenphone is a Linux mobile development device open for unlimited software innovation. Offered as part of […]

HOW TO – Make a Theremin

HOW TO – Make a Theremin

In 1919 Leon Theremin made an interesting instrument called the Theremin, it works a bit like a metal detector, and was the first musical instrument designed to be played without using your hands – here’s how to make one from “Popular Electronics November 1967” – Link. Related: Optical theremin + soapdish – Link. DIY RCA […]

Solar cells

Solar cells

Spark Fun Electronics has some new 7 x 4.5″ 9V solar panels for $30 – “Packaged solar cell with barrel plug termination. This is a custom cell produced for SFE – not a small toy surplus item! This unit is rated for 8V open voltage and 310mA short circuit. We actually took a random unit […]