This circuit is from a 1965 Radio Electronics. The triggering transformer generates high voltage pulses. The generated light pulse depends on C1 and C2.
This circuit turns on and off when a short pulse is applied by SW to the input of the first...
This circuit was found in a 1970 US publication. Transistors are still common and the circuit can be...
This circuit locks after a short touch on the sensor. The circuit can be powered by voltages from 5...