Re: 4-6 LED Color Changing Platform

It doesn't use any 555s. It's the circuit below that
called "automatic 12 volt lamp dimmer"
It uses one LM324 (quad op-amp), a few resistors and
2 small transistors. Probably costs less than $2 and
produces 3 colors from 2 LEDs. If you can work out
a 90 degree phase shift from one of the outputs,
you can drive another 2 LEDs and they will all be
separated 90 degrees.

-Bill

.

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