No information is given on the transformer in this circuit that we found in an American 1967 documentation. The power transistors are of the time and mounted on a plug-in module.
The operational amplifier used on this 1968 circuit is not common today. However, the setting can be...
This circuit was found in an old American magazine and could make use of more modern components...
This two competitor version of the game is shown below and uses lamps as indicators. You can...