Category Archive: LEDs

Aug 25 2013

AVR USB RGB LED Controller

While working on an update for my CPU Usage LEDs project I thought why not just make it into a universal RGB LED controller? The CPU Usage LEDs controller took a value between 0 and 255, worked out what colour it should be and then fade to that colour. This was very limiting; changing what …

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Sep 11 2012

CPU Usage LEDs

This project has now become the AVR USB RGB LED Controller project. The CPU Usage LEDs host program can be found in the examples directory. Having seen a few circuits around the web that light up LEDs depending on CPU load I decided to make my own since they do look pretty cool 😀 I …

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Nov 19 2011

LEDs looking pretty

I haven’t really used LEDs all that much other than as power indicators or in a joule thief, perhaps it time to make some pretty flashy things. 😀 I went searching for some LED flashing circuits that would be able to have at least 4 LEDs with minimal components and came across 2 that I …

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Jan 20 2011

Joule thief

In case you’ve not heard of a joule thief before, they’re simple voltage boost circuits, usually used to drive light loads like LEDs with a single battery cell, even batteries that other electronic devices consider ‘dead’ can be used, [Wikipedia article]. I made 2 versions of the joule thief, the common one with a single …

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