This sophisticated circuit was found in the November 1978 issue of Radio Electronics magazine. Based on CMOS logic, it has several types of timing, controlling the wiper relay.
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...