We found this cable tester in a Popular Electronics from the 90s. The circuit uses a connector according to the cable to be tested. Adaptations can be made for different types of cables.
When the illumination decreases, this multivibrator starts up, causing the lamp to blink at a...
Found in Radio Electronics, this simple indicator circuit uses general-purpose transistors common today....
November 2016 - Mouser Electronics is makingToshiba's new TLP78x and TLP79x isolation amplifiers...