Found in a November 1977 Radio Electronics magazine, this digital circuit was described in an article that taught how to assemble it. The 6-digit circuit is a clock.
This simple Bargraph photometer with 4 LEDs was found in a 1997 documentation. The scale is...
This 7400 TTL circuit has a memory, keeping the LED on when a pulse is detected. The circuit must be...
This constant current source was found in the Linear Applications Handbook of the National...