Latching relay (CB25722E)

The figure shows how to connect a relay to obtain the latch effect. The circuit is from an Electronics Now from June 1994.

Metal Detector (CB5334E)
The search coil of this detector consists of 140 turns of wire 18 in an 8 inch diameter form. The...
Scheduled Triggered Timer (CB4338E)
This circuit was found in a 1989 documentation and was intended to be part of a presence...
Overtone Oscillator II (CB4585E)
In the figure we show a configuration for a crystal controlled overtone oscillator using a...