Found in the March 1989 issue of Radio Electronics magazine, this circuit is used to test printer and other cables. The indication is made by LEDs.
The circuit shown in the figure is intended to drive solenoids up to 2 A from a signal at the high...
This shield circuit was suggested by a 90s Popular Electronics. The circuit can use either a triac for a...
This Hartley telegraphy oscillator operates with the transmitter signal generating a tone in a...