Warning shield (CB6855E)

This circuit uses a General Electric coupler from the time of the publication in the 1980s. Equivalent SCR can be used.

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Scale Adapter for Multimeter (CB16845E)
The purpose of this circuit is to allow common analog multimeters to measure low resistances, on...
Light-sensitive circuit (CB23962E)
We found this circuit in a Radio Electronics issue from July 1969. The lamp remains on until C1...
Slave flash trigger (CB8704E)
This circuit was found in a 90s Popular Electronics. The sensor can be any phototransistor. ...