Half wave control (CB21375E)

This circuit for heating elements was taken from a 1966 General Electric manual. The SCRs are load-according, and the sensor is 1 ohm.

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Sound switch (CB21740E)
This circuit was found in Popular Electronics from 1969. The circuit uses a small speaker as a...
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This is the transmitter for a remote-control system published in the August 1986 issue of Radio...
Car Amplifier (CB16296E)
This amplifier can work with voltages between 12 and 22 V. This means that we can use it in the...