This shield with full-wave triggering was found in the Radio Electronics Experimenter magazine of 1989. The Triac must be according to the load that must be controlled.
The integrated circuit is from the time. This low-power circuit was found in the April 1973 issue...
This circuit is suggested by a 1965 General Electric documentation. The triac must be in...
This circuit with silicon transistors at the time was found in the Radio Electronics magazine of...