This 4-competitor TTL speed game was obtained in a 1980s documentation, but can still be easily assembled by the components you use. The circuit has the LED indication and must be powered by 5 V.
![](/images/stories/cir/2101202023_140000_0001.gif)
This 4-competitor TTL speed game was obtained in a 1980s documentation, but can still be easily assembled by the components you use. The circuit has the LED indication and must be powered by 5 V.