Found in American documentation from the 90s, this circuit can be used as a shield with the replacement of the output optical coupler. The operational also admits equivalent.
This is a circuit that allows remote activation of a power supply. The circuit was used with a...
Found in a 90s Elektor, the purpose of this circuit is to protect a speaker in case of amplifier...
This circuit detects smoke by changing the light falling on the sensor. The circuit was found in...