Week 6 - Journal

Represent distance by colors

1. If the object is 20 cm away or less the RGB LED goes RED

2. If the object is more than 20 cm away, the RGB goes Green

A) Wiring

1- Attach RGB LED on Breadboard

2- Wire the RGB with the Arduino using 220 ohm resistors

• RED >> pin 11

• BLUE >> pin 10

• Green >> pin 9

• Cathode >> GND

3- Wire the ultrasonic sesnor

• Trigger >> pin 13

• Echo >> pin 12

• VCC >> 5V

• GND >> GND

4- Attach the Arduino GND to the -ve of the breadboard

5- Attach the Arduino 5V to the +ve of the breadboard

B) Coding

1- Read ultrasonic sensor on Trigger pin 13 & Echo pin 12

2- If the distance is less than or equal 20 cm, set the RGB LED red

3- Else: the RGB LED will be green (the distance is more than 20)

Schematic Diagram