Arduino - Traffic lights for your restroom

Configuration

Waiting delay before change state (seconds)

changeStateDelay = 3;

Delay after is long presence (seconds)

longPresenceDelay = 120;

Yellow light - Short duration (seconds)

shortOutDuration = 20;

Yellow light - Long duration (seconds)

longOutDuration = 180;

Bill of materials

1 x Arduino Nano

1 x Sensor HC-SR04

3 x LED G4, 12/24v DC

3 x Relay KY-019 5V DC / 220V AC-DC

1 x Potentiometer 10k Ohms

1 X Power 12v DC

Wiring