In this circuit the triac conducts when switch S1 is opened. We found it in the October 1987 Radio Electronics magazine. The triac is controlled according to the load.
This circuit was found in an Electronic Design from 1964. The components are from that time and...
The bridge diodes of this circuit, found in a 1967 publication, are according to the motor...
Found in a 1970 EEE, this circuit uses general-purpose transistors of the time. Transistors support...