Bistable light relay (CB21708E)

This circuit was found in an internet documentation. The relay must have voltage according to the supply.

Power monitor (CB7263E)
This circuit causes an LED to flash if the monitored voltage exceeds the value set in the pot. The...
True RMS Voltmeter (CB25353E)
This circuit is from a Radio Electronics magazine from August 1990. The indicator module is of a...
3 to10 MHz Oscillator (CB13020E)
The modified Hartley oscillator seen in the figure can generate signals ranging from 3 MHz to 10...