This simple logic test circuit with 3 LEDs was found in October 1985 Radio Electronics magazine. The power supply is according to the logic, and this version is indicated for TTL.
The circuit shown is from the SGS manual of linear integrated circuits of 1982. The L78xx is...
The circuit we give is a circuit that uses a common 1N4148 diode as a sensor to control the...
This circuit using a general-purpose transistor was found in the July 1993 issue of Electronics Now...