The ESP32 WROOM Educational Modular Synth Thing

The Simple DIY Electronic Music Projects blog, for a while, wondered if it was possible to find something that could be used to learn about the basics of analog synthesis. The Educational DIY Synth Thing is the result.

There are several educational synths on the market – just searching for “educational synthesizer” brings up many such hits, such as the Tangible Waves Synth Explorers or Erica Synth’s Bullfrog. And whilst these aren’t ridiculously priced when you consider the build quality and functionality, they are not really the kind of thing I had in mind.

So this has got me wondering what it would take to produce something that could support the absolute basics of an analog synth in a cheap (so 100x100mm) PCB with through-hole components that would be suitable to linking up to a solderless breadboard for further experiments.

It also has to be cheap and relatively easy to get hold of and DIY build. This is more important than quality of output I feel. It also means it won’t be an issue if something gets fried whilst experimenting – just build a new one.

The original ESP32 microcontroller was chosen for the heart of the board.

There are six parts to the tutorial:

  • Part 1 – This introduction and high-level design principles.
  • Part 2 – Detailed design of an ESP32 based PCB.
  • Part 3 – Software design.
  • Part 4 – Mechanical assembly and final use.
  • Part 5 – Six simple experiments to try.

Check it out starting here.


Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards

Join Adafruit on Mastodon

Adafruit is on Mastodon, join in! adafruit.com/mastodon

Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Join over 36,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – The easiest way to program microcontrollers – CircuitPython.org


Maker Business — “Packaging” chips in the US

Wearables — Enclosures help fight body humidity in costumes

Electronics — Transformers: More than meets the eye!

Python for Microcontrollers — Python on Microcontrollers Newsletter: Silicon Labs introduces CircuitPython support, and more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

Adafruit IoT Monthly — Guardian Robot, Weather-wise Umbrella Stand, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProds 7/19/23 Feat. Adafruit Matrix Portal S3 CircuitPython Powered Internet Display!

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.