Goal:

The goal of this project is to build a LED light that will light up when the environment is dark and senses people approach.

Components:

red led x1

green led x1

 

resistor(200Ω) x1

resistor(10kΩ) x1

photocell x1

arduino board & breadboard

 

How it works

The photocell will first sense the light in the room. If the data is less that 700 and the distance that UltraSensor sense is less that 10, the light will turn on.

Code: https://github.com/joycemolly/pcomp–lock-combination/blob/master/homeworkLock.ino