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.
Found in American documentation from the 1970s, this circuit can be designed based on a modern SCR,...
June 2017 - A wide variety of Rohm Semiconductor audio and codecs for audio is available from...
Found in a 1964 Electronic Design, this circuit must use transistors according to the supplied...