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POProblems controlling a Rainbowduino
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  1. POProblems controlling a Rainbowduino
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    copied!<p>I've just bought a <a href="http://www.seeedstudio.com/depot/rainbowduino-led-driver-platform-plug-and-shine-p-371.html" rel="nofollow noreferrer">Rainbowduino</a> to control a load of individual LEDs (NOT an RGB matrix). All the documentation so far is aimed towards controlling RGB arrays which is <strong>not</strong> what I'm after.</p> <p>If you're unfamiliar with the Rainbowduino it's an <a href="http://en.wikipedia.org/wiki/Arduino" rel="nofollow noreferrer">Arduino</a> clone with 24 constant current channels of 120 mA, 8 super source driver channel of 500 mA each and a wide output voltage adaption from 5 V - 12 V DC. Perfect for driving LEDs. The product webpage is here: <a href="http://www.seeedstudio.com/blog/?page_id=187" rel="nofollow noreferrer">http://www.seeedstudio.com/blog/?page_id=187</a></p> <p>I've connected up 16 LEDs and want to be able to turn each one on and off individually with <code>digitalWrite()</code>. I've uploaded some demo code to the board which isn't really working. I've worked out that the 8 driver source channels are easily controllable with <code>digitalWrite()</code> on pins 3-11. However controlling the other 24 sink channels is more difficult. Apparently they are controlled by 3 shift registers (one each) which I can only access with shiftOut. I've got no idea how this works. Can somebody help point me in the right direction?</p> <p>Half the LEDs are wired into Blue 1-8 and the other half are wired into Green 1-8. The positive legs are wired into VCC1-2 which have been set to HIGH. I'm confident the circuit is wired up correctly, it's the programming I'm having issues with.</p> <p>I've looked over the sample code which is shipped with the Rainbowduino, but I can't make sense of it. How can I fix this problem?</p>
 

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