/* (c) 2022 Christian Grieger GNU GENERAL PUBLIC LICENSE Test the trim pot (Pin: A0) */ void setup() { for (byte i = 0; i < 4; i++) { pinMode(10 + i, OUTPUT); } } void loop() { for (byte i = 0; i < 4; i++) { pinMode(10 + i, OUTPUT); digitalWrite(10 + i, HIGH); } digitalWrite(10 + (analogRead(A0)/10)%4, LOW); delay(50); }