Make: Volume 75

1. CONNECT THE LED STRIP

The green wire from the LED strip is the Data

wire, red is Power, and white is Ground. Connect

the white wire to the ground of your power

source, and the red wire to 5V of the power

source. Connect the green wire to Digital 3 on

the Arduino (Figure

A

). I used a 1 meter, 60

count LED strip and cut that in half to make two

separate garage sensors. You can use whatever

number of LEDs works for your garage, just

make sure you change the NUM_LEDS value in the

Arduino code to whatever number you have.

2. CONNECT THE ULTRASONIC

SENSOR

Place the ultrasonic distance sensor on the

breadboard. Then connect it to the Arduino:

sensor ...