Found in American documentation from the 90s, this circuit has a timing system for activating the headlamp and lanterns.
This circuit triggers a relay when the light that falls on the phototransistor is cut off. The...
Another of the many tachometer circuits we have on our site. This one is from the September 1976...
Square, triangular and sawtooth signals are produce by this circuit. Frequency is adjusted by P1...