Unique Projects with Digital Potentiometers

Build a Remote Volume Control & Variable Power Supply using Digital Potentiometers!

Article with code: https://dronebotworkshop.com/digital-potentiometers
More articles and tutorials: https://dronebotworkshop.com
Join the conversation on the forum: https://forum.dronebotworkshop.com
Subscribe to the newsletter and stay in touch: https://dronebotworkshop.com/subscribe/

Today, we are working with an interesting component: the Digital Potentiometer or Digipot. As the name implies, these devices are potentiometers whose wiper position is set digitally. While they are primarily used for interfacing analog and digital electronics, they also have a few other uses.

Today, we will work with three digital potentiometers: an integrated circuit with two digipots and a couple of full-featured modules from Adafruit. You’ll see how easy it is to code for an Arduino and ESP32 board.

After that, we will build a couple of projects that use digital potentiometers. The first is a remote analog volume control that uses an infrared remote (any remote will work; I used one from a television) to control an analog audio signal.

We will also use a digital potentiometer to construct a linear power supply with a variable output voltage. Since our design uses an ESP32, it just made sense to give it a web-based interface!

Here is the Table of Contents for today’s video:

00:00 – Introduction
02:04 – Digital Potentiometers
08:32 – MCP4231 SPI Digipot
16:51 – DigiPot as Waveform Generator
21:42 – Adafruit DS1841 & DS3502
30:26 – Audio Remote Volume Control
39:31 – Remote Controlled Power Supply
51:15 – Conclusion

Please also check out the article accompanying this video for all the code and wiring diagrams. It can be found at https://dronebotworkshop.com/digital-potentiometers.

Hope you enjoy the video!

Bill

source