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 indicator or VU meter for stereo amplifiers was found in a 90s Radio Electronics. The...
This interesting circuit from 1967 documentation uses three series lamps to regulate the voltage...
This circuit causes an instrument needle to oscillate to signal an event. The circuit is powered by...