Incandescent light strings controlled automatically by an Arduino microcontroller.
Incandescent Christmas light string reconfigured for 12VDC & connected to enhance the stock vehicle lighting system. When a turn indicator is active, the respective string of Christmas lights blink. When the brake is engaged, both strands are bright. When braking & a turn indicator is active, one strand remains bright while the other blinks in sequence with the turn indicator. When no longer braking, both strands fade to minimal brightness. When headlights are off, both strands fade out completely.