Two LED flashing patterns via buckpuck using microprocessor ouput

npomeroy

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Jan 2, 2013
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Sorry if this information is in a previous post - I did look.

I want to switch two flash patterns with 700 mA Luxeon rebel LEDS, using the 6-wire Buckpuck driver http://www.luxdrive.com/content/3021-BuckPuck.pdf. I've got the timing sorted in a Picaxe program so the signals are in the output pins that can source 5v. I understand the proper way to switch them is via the CTRL and REF wires. I am assuming (and have ordered) two buckpuck units so each one only has one switching pattern. The question is: The Picaxe outputs need a common ground, so if I am switch TWO buckpucks there needs to be a common ground for them too in the swiching circuit: which will be common ground? (Edited sentence for clarity)

Alternatively, looking at fig 14 I wonder if I could have two sets of LEDs on one buckpuck independently switched with 5v pulses through their respective ground lines.
 
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