Arduino Project Handbook

PROJECT 3: BAR GRAPH

IN THIS PROJECT, YOU’LL COMBINE WHAT YOU’VE LEARNED IN THE PREVIOUS LED PROJECTS TO CREATE AN LED BAR GRAPH THAT YOU CAN CONTROL WITH A POTENTIOMETER.

PARTS REQUIRED

• Arduino board

• Breadboard

• Jumper wires

• 9 LEDs

• 50k-ohm potentiometer

• 9 220-ohm resistors

HOW IT WORKS

A bar graph is a series of LEDs in a line, similar to what you might see on an audio display. It’s made up of a row of LEDs with an analog input, like a potentiometer or microphone. In this project, you use the analog signal from the potentiometer to ...