This TTL circuit uses LED indicators and must be powered by a voltage of 5 V. The capacitor determines the speed of the draw. We found it in documentation from the 90s.
With a single LED on the scale, this voltmeter has low consumption. The circuit was found in the...
This circuit was found in the February 1994 issue of Electronics Now magazine. The circuit uses 6...
Found in American documentation from 1969, this circuit uses logic inverters to obtain sequences of 4...