Linux-powered Drumset Business Card

This project is a tiny Linux-powered business card you can play. Touch the printed pads to trigger drums; input and audio run in userspace on a minimal Linux image. This version highlights the novelty of "Linux on a card" and the ability to script/extend with standard Linux tools.

For makers who prefer Python/CircuitPython, there's a sibling RP2040 edition that's instant-on and very beginner-friendly.

Demo

30-sec video (also attached)

Highlights

SoC: F1C100s running mainline Linux
Input: TTP229 capacitive touch controller, sensor pads are covered by Multi-color silkscreen
Audio: FluidSynth software synthesizer, output to 3.5 mm standard TRS jack
Power: USB-C (5 V). Activity LED.

Software and instructions

See my github repository https://github.com/serganto/linux-drumcard for software and detailed instructions. Project page on my website: https://www.midiaccordion.com/drumcard

Why Linux

Ready-made tooling (package management, services, scripting)
Educational bring-up: kernel + rootfs + userspace services
Because it's challeging :)

Essential BOM

F1C100s + TTP229
USB-C (power), 3.5 mm audio out
DC/DC ICs, LED, passives
Multi-color silkscreen PCB with hidden pads

Licenses

Hardware: CERN-OHL-S v2.0 (publish editable sources if you modify and convey)
Software: GPL-3.0 only
Docs/Images: CC BY-NC-SA 4.0, except the following: my personal branding elements: name, logo, QR code, background, visual layout are excluded from all open licenses and remain proprietary; for branding elements, all rights reserved; but you can still freely use them editorially (news, reviews, academic commentary). So the side with my branding is covered by a watermark - use your own.

See details on licensing in my github repository. For commercial use, please contact me first.

Other

Reproduction cost shown assuming that you order a batch of 10 pieces and manually assemble them - an SMT assembly will cost extra.