A Modular Macro Keypad
A new modular macro keypad called suutari20 utilizes 3.5 mm audio jacks to connect individual keys, allowing for a flexible and low-cost custom keyboard setup. The device is powered by an RP2040 microcontroller and runs QMK firmware, making it accessible to users familiar with custom keyboard programming. Each key module contains its own microcontroller, supporting up to 18 keys including analog devices like volume knobs.
- ▪The suutari20 macro keypad uses 3.5 mm jacks to connect modular keys, with each jack supporting up to three keys.
- ▪The central hub is powered by an RP2040 microcontroller from a Raspberry Pi Pico and utilizes QMK firmware.
- ▪The design allows for the integration of analog devices such as volume knobs and jog controllers alongside standard keys.
- ▪Each individual key module includes its own microcontroller, distinguishing it from traditional custom keyboard architectures.
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| Original publisher | Hackaday |
| Canonical URL | https://hackaday.com/2026/09/26/a-modular-macro-keypad/ |
| Publication time | Sun, 27 Sep 2026 02:00:00 +0000 |
| Retrieval time | 2026-09-27T02:00:40.664Z |
| Last seen | 2026-09-27T02:00:40.664Z |
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A Modular Macro Keypad No comments by: Bryan Cockfield September 26, 2026 Title: Copy Short Link: Copy The introduction of the ATmega32U4 microcontroller, with its integrated USB controller, made a lot of hardware tasks much simpler than they were before. One of the arenas it revolutionized was custom keyboards, making it much easier to build not only standard mechanical keyboards, but keyboards of all kinds of shapes and layouts and custom macro keyboards as well. This trend has continued on for the better part of the past decade with other microcontrollers beyond the 32U4 now available as well, but this modular macro keypad takes it to a new level by keeping that simplicity but also keeping costs down.
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