Capacitive Relay (T1527E)

Found in Popular Electronics from August 1956 this sensitive two-tube relay is powered directly from the mains power supply.

Clock Signal Generator (CB25254E)
This circuit with a 4046 PLL was found in the December 1989 issue of Radio Electronics magazine. The...
Irrigation Pump (CB18084E)
This circuit is from 2005 documentation. It automatically starts an irrigation pump when the...
Shunt Mode Motor Control (CB13800E)
This circuit was found in the National Semiconductor's Linear Applications of 1978. The circuit uses...