Low Voltage Test (CB22158E)

This is a simple voltage tester for voltages from about 2V to about 15V with the indicated resistor and red LEDs.

5 W Amplifier with Tone Control (CB24853E)
This circuit with the ULN3784B appeared in the October 1984 issue of Radio Electronics magazine. It can...
Light Activated AC Switch (CB25875E)
Using a CA3059 this circuit was found in the July 1995 Electronics Now magazine. The triac must be...
Latch for SCR (CB7245E)
This circuit is from a 1966 General Electric documentation. The circuit applies to sensitive SCRs for...