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MicroView Learning Kit

11 Soft Potentiometer

Introduction

In this circuit you’ll work with a potentiometer. A potentiometer is also known as a variable resistor. When it’s connected with 5 volts across its two outer pins, the middle pin outputs a voltage between 0 and 5, depending on the position of the knob on the potentiometer. A potentiometer is a perfect demonstration of a variable voltage divider circuit. The voltage is divided proportionate to the resistance between the middle pin and the ground pin. In this circuit, you’ll learn how to use a potentiometer and display it's value on the MicroView.

Parts

Component Reference Image
Soft Potentiometer Soft Potentiometer Diagram
330Ω Resistor 330Ω Resistor Diagram
330Ω Resistor 330Ω Resistor Diagram
Red Jumper Red Jumper Diagram
Black Jumper Black Jumper Diagram

Checkout our breadboard guide and MicroView Pinout for more information.

Breadboard Setup

MicroView Arduino Code

What you should see

As you move a blunt long object (like the one shown below) up and down the soft potentiometer, the MicroView Slider Widget should change it's value accordingly.

If it isn't working, make sure you have assembled the circuit correctly and verified and uploaded the code to your MicroView, or see the troubleshooting tips below. Warning: Do not use your thumb or fingers to slide the softpot as you could short the circuit and potentially burn!

Troubleshooting

Bizarre Results

The most likely cause of this is if you’re pressing the potentiometer in more than one position. This is normal and can actually be used to create some neat results.

Still No Success?

A broken circuit is no fun, send us an e-mail and we will get back to you as soon as we can: help@geekammo.com