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How do tricolour LED lights work? (the ones that cycle from colour to colour)? Answered

I was looking for a pack of blue LED's online and came across a red/green/blue cycling LED which only had two leads coming out from it. How do these work?

2 Replies

frollardBest Answer (author)2011-07-07

They have an entire microcontroller built into the plastic housing. You supply the voltage, and it uses PWM to dim the 3 colours to make all the colours.

Convenient package/wiring

Not customizable. Once programmed, its stuck that way forever. (may not be a con)

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