The purpose of this circuit found in a 1967 GE SCR manual is to control a heating element. The SCR must have current according to the controlled load.
This circuit, which uses a planar silicon sensor, is from a 1964 Electronic Design. The component...
This circuit is from 80's documentation. Operational equivalents can be used. The power source is 5 V...
Delayed Pulse Generator This can be considered an "advanced" application where two 555 integrated...