Deep Darc has successfully reverse engineered the operation of a 50-light set of GE multicolor Christmas lights. His work involved snooping the protocol used on the LEDs data bus line and exploration of the remote control unit, resulting in source code allowing control of the display of colors and patterns by an Attiny13A.
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Beautifully done !
If they were only available in The Netherlands
I agree with Hessel, beautifully done indeed.
If only they were available in the UK.
Spike