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 has already been explored in other articles on this site. The high power is due to...
This circuit was obtained in a 1978 magazine, but it can be easily assembled. What the circuit does...
This circuit is from a 1988 documentation, but uses components quite common today. The circuit...