Flip Flop 4027 (CB25120E)

This circuit was suggested by an article in the April 1988 Radio Electronics magazine. The flip-flop is of the JK type.

Visual Fatigue Test (CB15713E)
This simple circuit makes it possible to test visual fatigue by the ability to detect higher...
Thermocouple amplifier (CB19713E)
The operational amplifier used in this configuration is of an uncommon type today. The circuit can be...
Signal Plotter with the 741 (CB11612E)
The sophisticated signal tracker/follower with a JFET and integrated circuit 741 was found in a...