SCR mechanical drive (CB6572E)

This contact or reed switch actuation was found in a 1964 Electronic Design. The circuit can be used with sensors and the triac is load dependent.

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Tone Modulated Remote Control Decoder (CB11903E)
This is the circuit that decodes the signals from the CIR3059. The adjustment of each frequency is made in...
Audio voltmeter (CB22308E)
This circuit measures the strength of audio signals. We found it in an American publication from...
AC millivoltmeter (CB21862E)
This circuit is from a 1974 Ferranti transistor manual. The circuit is analog, and the components used...