Goal of project/interaction

Create a circuit that the LED will light up only when the ultrasonic sensor detect something close and photocell sensor is covered.

Core components

1 * ultrasonic sensor
1 * photocell sensor
1 * LED
1 * 10k ohms resistors
1 * 220 ohms resistors
Wires & jumpwires
Arduino board

How it works

Get close to the ultrasonic sensor
Cover the photocell
LED light up

Github

pcom/ultrasonic&photocell