This circuit for old flashes with xenon lamps was found in a Radio Electronics magazine from June 1966. The sensor is a photoelectric cell from the time. Power is supplied by a 9 V battery.
This circuit was found in a Radio Electronics magazine from August 1963. The transistors are...
In the figure we have a circuit in which the second tone recognizer remains disabled until the...
This circuit was found in a 1980 publication. This circuit converts a triangular input signal into...