How to Use a Potentiometer

Uses and operation

The potentiometer is a type of three-terminal variable resistance.

He's composed of a resistant disk where a cursor is moving.

As there are 3 terminals, one of them is connected to the cursor and others to the extremity of the resistant disk.

This system is used to collect a voltage that depends on the position of the cursor and the voltage at which the resistance is subjected.

Potentiometers are EVERYWHERE ( like electronic nowadays ) but particular in particular in the joystick.

And I don't know what else to say about potentiometers.

In this project we will be able to control the blinking of a LED and a servo motor.

Connections ( to control a LED ) :

Arduino --> potentiometer ( based on the picture above ) :

5V --> 5V

AO --> Signal

GND --> GND

Pin 13 --> 1st extremity of the resistance

2nd extremity of resistance --> positive pin of LED

Negative pin of LED --> GND

Connections ( to control a servo motor ) :

Arduino --> potentiometer

5V --> 5V

A0 --> Signal

GND --> GND

Arduino --> Servo

Red wire --> 5V

Brown wire --> GND

Yellow wire --> Pin 9

But you can use a potentiometer with a LED without code.

You just have to make connections.

Arduino --> Potentiometer

3,3V --> 5V

GND --> GND

GND --> LED cathode

Potentiometer --> LED

Signal --> LED anode