Auto Faucet - Robotic Eye Comparator

This circuit shows you how a sensor in an automatic faucet uses shadows to control the flow of water in the tap. Tap on the Voltage of V2 and adjust the slider. High voltage represents more light, lower voltage represents less. You can control the threshold voltage by changing the position of the potentiometer. Tap on the % value of R1 to change how much light/dark will turn on the tap.