Analog reading to Digital

[evanmars]

Programming help

So the current program is for lights on a roundhouse garage for a Model Railroad, when there is a train in the stall the sensor is tripped low so a red light turns on. If the stall is empty the sensor is not tripped it reads high and a green light turns on. I want to add led lights on the inside and want them to turn on for a specific time when a sensor change in state for any of the sensors. int LDR1 = 0; int LDR2 = 0; int LDR3 = 0; int LDR4 = 0; void setup() { // put your setup code here, t…