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.
This circuit is from a Radio Electronics from April 1972. The circuit uses power transistors of...
This circuit was found in the February 1980 issue of Radio Electronics magazine. The digital...
This circuit simulates the actual departure of a train as the speed increases slowly. The power...