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ESP32-S3-MINI-1-N4-R2, USB-C, TDK ICS 43434 microphone, 124 WS2812 style LEDs in rings, diffuse case, works with WLED, with Stargate print
ESP32
Audio
LEDs

LED sound reactive printed coaster (stargate)

Sold by RevK® at Andrews & Arnold Ltd

$46.97

No tax for United States [change]
We can print on the coaster for you
Stock available: 10
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Original Design
This product was designed by RevK® at Andrews & Arnold Ltd. By buying this product you support original hardware creators.
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What is it?

A main PCB in a 3D printed white translucent resin case as a drinks coaster.

  • ESP32-S3-MINI-1-N4-R2 (Dual CPU, 4M flash, 2M SPI RAM)
  • USB-C for power and USB
  • TDK ICS 43434 MEMS microphone for audio reactive lighting effects
  • 124 WS2812 style RGB LEDs in rings 4+8+16+32+64

Full white on all LEDs uses under 2A from 5V USB, typical usage way lower. Bear this in mind when connecting USB as USB-A (e.g. from a computer) only has to provide 0.5A. Most phone chargers will provide 2.1A though.

Typical usage is audio sound ractive colourful LEDs (Fourier transform) activated when a drink is place on the coaster then running for a time.

Supplied with my LED code, but can also be loaded with WLED code (select ESP32S3).

See video.

Why did you make it?

Fun, and testing my code for LED placement in KiCAD, which is not easy. It is cool, and adding printing using my new UV printer means it can be extra special. I'm obviously a stargate fan!

If you want your own design printing, I'll email you to get artwork: The coaster is 110mm diameter with a 90mm recessed area in the centre which is ideal for any circular design. Vector (SVG) preferred. I usually only print on the back for Stargate designs where I have a design that avoids the feet and microphone hole.

Stargate print designs from Max Willis, with thanks.

Links to code and documentation

Documentation (led.revk.uk)

Code (led.revk.uk)

Design Files (codeberg.org)

Schematics (codeberg.org)

Bom (codeberg.org)

Product HS Code: 853120

Shipping policy

All parcels shipped with tracked shipping, usually shipped within one working day.

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The seller

RevK® at Andrews & Arnold Ltd

RevK® at Andrews & Arnold Ltd logo

BRACKNELL, Berks, UK
34 orders since Apr 3, 2025
Andrews & Arnold Ltd are a UK based communications company. We sell internet, telephone, SMS, and make some serious routers (FireBrick).
We use a lot of open source, and give back with a lot of open source code and hardware designs on Codeberg.
We have many open source PCB designs. These are not sold as consumer products, but assembled PCBs, development boards for hobbyist use.
Suggestions and git merge requests on Codeberg always welcome.