This is the traditional circuit from the 1980 racing video game with the AY3-6603-1 that we also published at the time in our magazines. This circuit is from the Radio Electronics magazine of August 1980.
This code switch only activates a relay when the right sequence of buttons is pressed. The circuit...
This current-limited variable power supply was found in 1977 book. The diodes are according to...
This circuit for measuring bridges was found in American documentation from the 60's. Transistors are...