4 layers93.7 × 43.7 mm
Flight Computer
SunDevilRocketry/Flight-Computer
General purpose flight computer for high powered rocketry projects.
113 parts5
2 layers89.4 × 54.8 mm
Mintboard
flurples/mintboard31a 40% bluetooth keyboard built into an altoids tin
- Size
- 89.4 × 54.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 91
- Nets
- 68
- Pads
- 284
- Tracks, vias
- 319, 17
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 6 Sep 2026
- Updated
- 6 Sep 2026
Overview
Mintboard is an open-source printed circuit board by flurples, from the flurples/mintboard repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 89.4 × 54.8 mm with 91 parts on 68 nets, routed with 319 tracks and 17 vias.
It is built around the PTS647SM38SMTR2LFS. Its parts include 41 diodes, 41 switches and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdmintboard
a 40% bluetooth keyboard built into an altoids tin
you will need
- an altoids tin
- a mintboard pcb (with diodes and switches)
- 1x top and 1x bottom housings
- keycaps ( 32x 1u, 2x 1.25u, 4x 1.5u, 2x 1.75u, 1x 4u)
- a nice!nano
- a small battery (I used a 301230 110 mah lithium battery from typeractive)
- a OS202011MA0QN1 or equivalent power switch
- 4x m2 screws
- double sided tape
- a dremel or something to cut the altoids tin with
notes
- pcb production files can be found in mintboard/pcb/production
- bom files were created for jlcpcb's parts library in 2023; double check correct components before ordering
- use the provided .uf2 file to flash the nice!nano, or build your own firmware if you want. the zmk build files were made for an older version of zmk so they will likely not work without some modification.
disclaimer
I do not sell any products, and I am not affiliated with any vendors who claim to sell my designs. if you choose to support these vendors, I am not responsible for any issues you may encounter with them.
gallery
Parts
91| Qty | Value | Footprint | References |
|---|---|---|---|
| 41 | D_Small | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +25 |
| 41 | PTS_647_SM38_SMTR2_LFS | button1:SW_PTS_647_SM38_SMTR2_LFS_1133 | S1, S2, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23 +25 |
| 4 | MountingHole | MountingHole:MountingHole_2.5mm | H1, H2, H3, H4 |
| 2 | TestPoint | TestPoint:TestPoint_THTPad_D2.0mm_Drill1.0mm | TP1, TP2 |
| 1 | LOGO | promicro:mintboard-logo | G*** |
| 1 | ProMicro | promicro:ProMicro-SMD | U1 |
| 1 | SWITCH_011MA0QN1 | onoff1:OS202011MA0QN1 | U2 |
Questions
How big is the Mintboard PCB?
It measures 89.4 × 54.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mintboard use?
91 parts, built around the PTS647SM38SMTR2LFS. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Mintboard KiCad files?
From the flurples/mintboard repository on GitHub, at the commit this page was made from: the board is pcb/mintboard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mintboard design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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