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 controls a fan in the car, according to the temperature, activating it automatically when the...
This symmetrical power supply uses regulators from the 78xx and 79xx series and can be adapted to supply...
This highly sensitive circuit was found in a 1967 General Electric SCR manual. Equivalent...