Solar lamp to LED projector


Despite the resemblance to an alien robot that might rebuild your house from scratch, this is actually the first mod for a solar yard lamp that I’ve seen. By adding a brighter LED, a couple of tubes, a laser printed transparency and a lens, you end with with a relatively inexpensive image projector that can project custom graphics from odd locations. [via]

How-To: Make a digital synthesizer

This week’s How-To comes from our newest contributor: Logan Williams.

This simple guide will show you how to build a digital synthesizer that generates and manipulates square waves. Your synthesizer will have one oscillator, which produces a variable pitch controlled by a potentiometer, as well as an LFO which modulates that pitch at a variable frequency. The part count for this project is quite low, and it can be built for under $20.

[Read more...]

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