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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1.2 GHz Oscillator (CB19070E)
This circuit was found in a 1966 publication using a microwave transistor of the time. The circuit...
Tachometric Pickup (CB13430E)
The integrated circuit used in this application is the National Semiconductor's LM2907, the...
Unijunction timer (CB10846E)
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...