Transistors are common and when pressing the switch, only one of the LEDs remains lit. What it will be is not possible to predict, which makes the game possible.
This precision circuit, which also functions as a bridge, was found in a February 1967 Popular...
This circuit was found in a publication from the 90s. The circuit can be assembled with modern...
A first circuit that uses a phototransistor as a detector and is suitable for covering short...