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.
The circuit, shown in the figure, activates a relay when the logic level applied to its input, from...
The traditional circuit was taken from a French magazine Radio Plans that no longer exists but can...
This circuit makes use of the LM11, 112 or 113 operatives and was found in a 1980s documentation. The...