Bistable light relay (CB21708E)

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

Signal Injector (CB13531E)
This traditional signal injector configuration was obtained in a 1977 amateur radio manual. The...
Multivibrator LED Indicator (CB12490E)
This circuit was obtained in a publication in 1980. It is the traditional configuration of astable...
Variable Active Cycle Rectangular Generator (CB14915E)
We found this circuit in a Radio Electronics from 1989. It is a common configuration in which you...