Light pulse then on

Technically, it's supposed to be a "modulated light" and alternate up to 4-times before staying until the brake is released. Modulated meant 25 to 50% of power in the low brightness state and 100% brightness in the high brightness state. A judge had ruled that a modulated light was not a flashing light (which is specifically listed as an illegal modification in most states. In any case, most aftermarket taillight flashers actually flash and most cops don't care unless it flashes continuously.

This would give 5 steps of brightness, 1 step / pulse, 20% brightness increase each successive pulse :

Result of design, PWM duty cycle increased 20% each pulse train (eg. LED brightness), and then
as OP stated stays on full brightness -




You cant see the PWM duty cycle in this screen shot since its buried in the pulse(s) burst
timewise during each burst/flash.

If you want a video of sequence brightness ramping up let me know.

Whole event started/triggered when power is applied to circuit.


Regards, Dana.