This circuit was obtained from a 1967 GE SCR manual. The SCRs must be rated for the wattage of the controlled heating element.
Suggested by Philips documentation from 1968, this circuit uses components from the era that can...
This circuit uses NO sensors and was found in an American publication in the 90s. The supply must...
Found in American documentation from the 1990s, this circuit generates signals in the 350 to 500...