To add in a difficulty adjustment [Schuyler] included a poteniometer which alters the ... (which often come as strings of lights). An Arduino board controls the game, with a shield made from ...

so [Brett] decided to use an Arduino instead. The welders control circuit runs at 24V, so an optoisolator receives the trigger signal, and relays are used for outputs. Potentiometers were added to ...

Among all the Arduino boards, the Uno is most folks ... One is using an analog input like a potentiometer. In this case, the ...