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.
This circuit has a start and reset switches and can generate signals at long intervals determined by the...
We found this circuit in English documentation for PCs from 1996. The ZN448 is a very uncommon...
This circuit produces a sequence of steps controlled by P1 and applied to a 12V stepper motor with...