Bistable light relay (CB21708E)

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

Sensor Darlington Touch (MSB060)
Two transistors connected in direct engagement, so that the first emitter is connected to the base of...
Instrumentation Amplifier (CB18979E)
This amplifier with very high input impedance was suggested by Texas Instruments in a manual of...
27 MHz to VHF Multi-band receiver (CB18217E)
The coil of this receiver determines the range. It can have 2 to 10 turns of wire 20 to 24 in the...