Universal power control (CB8709E)

This circuit was found in a 90s Popular Electronics. The circuit uses several relays in order to obtain different controls for power loads.

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Water Level Alarm (CB5313E)
This circuit produces a loud sound in the speaker when water level reaches the sensor. The power...
1092 LED panel indicators (COM001E)
May 2016 - It can be obtained from Mouser Electronics new display 1092 from VDC. The new LED...
Two transistor assisted ignition (CB6391E)
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