This complete video game circuit was found in the May 1978 issue of Radio Electronics magazine. The circuit includes the power supply and timing based on the MM5710N.
This circuit, shown in the figure, consists of a variable gain amplifier with differential input...
This circuit releases a lock only if the correct 4-digit sequence is entered. The circuit uses...
Found in documentation from the 1980s, this circuit generates signals that can reach a few...