A conceptual circuit that achieves the behavior of switchback LED's on the vehicle.
Light blue led is the daytime driving light and yellow is the turn signal led.
Power source would need to go through constant current led drivers to support high power led's.
Circuit is not tested in real life and uses 555 to introduce a delay in the circuit before DRL are on.
Portion of the circuit originated from: http://www.instructables.com/id/LED-fading-with-a-555-timer/
