We found this circuit in the October 1987 Radio Electronics magazine. The triac must be controlled according to the heater. The transformer has a low current, of the order of a few hundred mA.
This circuit was obtained in an Electronics Now of the 90s. The circuit monitors the DIN connector of...
Found in a 1965 Motorola documentation, this circuit uses a neon lamp as a trigger element. The SCR...
The outputs of each switch position are determined by the zener voltage plus the drive voltage of each...