This circuit with SCR is from a Radio Electronics magazine from September 1965. It is a commercial control from Heathkit for controlling universal motors.
We found this circuit in a November 1970 Radio Electronics. It uses a PUT or programmable...
In the figure we have the way to implement a NO OR or NOR gate with an operational amplifier. The...
This TTL circuit uses 5 NAND gates of 7400 integrated circuits. It must be powered with 5...