This two competitor version of the game is shown below and uses lamps as indicators. You can replace then by LEDs with 470 ohm series resistors. R3 and R4 must be tested. Try values between 470 ohm and 2k2 ohm. Also R1 and R2 can be changed to achieve the Best performance. The circuit can be powered from cells or battery .

 

Who is the fast
Who is the fast?

 

 

 

 

Datasheets


N° of component