SCR Alarm oscillator (CB6114E)

This circuit was suggested by General Electric in a 1965 documentation. The circuit can be implemented with equivalent SCR.

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Proximity alarm (CB8195E)
Found in a 90s Popular Electronics, this circuit is based on a common CMOS component. The circuit...
Triangular generator (CB21336E)
Taken from an Electronics Now from the 90s, this circuit generates signals whose frequency depends on...
12 V x 1 A Power Supply 7812 IC (CB24822E)
This power supply uses a single-winding transformer. We found it in July 1984 Radio Electronics magazine....