This circuit was suggested by documentation from a 1980’s General Electric. The triacs determine the maximum load controls. The components in parallel with the load are varistor type protectors.
This circuit is from an American publication from the 60's. The power is on the order of 600 mW....
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 d...
Found in a European magazine from the 90s, this circuit emits beeps that are several seconds apart to...