Bistable light relay (CB21708E)

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

Power supply circuit with separate sources (CB25186E)
This circuit uses separate sources for the power supply and the operational stage. The output...
Gate Dipper (CB13563E)
This is a MOSFET version of a grid dip meter for frequencies between 1.8 MHz and 150 MHz,...
Decibel Meter (CB24299E)
Found in the March 1974 Radio Electronics magazine, this circuit is designed to measure the level...