Speed electronics test

Took all the gauges out and took them apart to get to the electronics and front panel apart.
Tried to get the speed gauge to work based on 5V / 12V + A variable pulse signal (not PWM) - did not work : (
I don't have a board that generates a PWM - will have to wait few more days
Or will connect a servo instead...

RPM panel light

RPM panel flat
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