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Twister Mat MIDI Controller

Discreetly modifying an old Twister mat to transmit MIDI note events when the circles are touched.

guy-dupontGuy Dupont
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  • guy-dupontGuy Dupont

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hardware
ongoing project
midi ESP-32 TWISTER

This project was created on 04/24/2021 and last updated 4 years ago.

Description

Using 24 force-sensitive resistors, some ADCs, and an ESP-32, I've built a Bluetooth MIDI controller from an old Twister mat. The hardware is all battery powered and protected by a wooden case, so the mat can safely be placed close to falling bodies but far away from any expensive noise-making equipment.

See full build video in project details, and check the Github page for source code (coming soon).

Details

Components

  • 24 × Force Sensitive Resistor One for each colored circle. I used ones with a 1.5" square target area.
  • 24 × 1k ohm Resistor To create voltage dividers with each FSR
  • 3 × MCP3008 (8 channel, SPI ADC) 3 X 8 channels == 1 channel per FSR
  • 1 × ESP-32 Dev Board Any should work, but you'll need access to default SPI pins + 3 Chip select pins (I think you can use any GPIO for these)

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Jonny wrote 03/07/2024 at 12:53 • point

Struggling to source components, and manage the influx of ludicrous¿? Ideas , like (newest) multi (controller) surface modes, ala osc/midi interfaces, to add tempo +/- , MTP, an X,Y floor sensor surface 📌, and a matrix, like a scale stepper https://sequencer.henryfellerhoff.com/ trying to order something like this https://www.alibaba.com/showroom/mcp3008.html whilst (always:) learning everything I need to know, and source . which is pretty much everything! 

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Dan Maloney wrote 04/27/2021 at 17:16 • point

Brings back memories of Twister tournaments when I was in college. Don't think they're doing that these days!

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Guy Dupont wrote 04/27/2021 at 17:17 • point

Definitely not this year!! Tournaments though?! that sounds awesome.

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