2 layers295.6 × 183 mm
Modulus
advaitconty/Modulus
A keyboard, designed to be completely modular via USB Type-C ports
231 parts
2 layers123.9 × 111.9 mm
Modulus Macropad
advaitconty/ModulusA keyboard, designed to be completely modular via USB Type-C ports
- Size
- 123.9 × 111.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 52
- Nets
- 60
- Pads
- 270
- Tracks, vias
- 274, 40
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Oct 2025
- Updated
- 28 Mar 2026
Overview
Modulus Macropad is an open-source printed circuit board by advaitconty, from the advaitconty/Modulus repository on GitHub. It is a 2-layer board of 123.9 × 111.9 mm with 52 parts on 60 nets, routed with 274 tracks and 40 vias.
It is built around the NC3MAH. Its parts include 25 diodes, 24 switches and 2 connectors. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
1README
readme.mdModulus
A keyboard, built with the idea of expansion in the future, through SPI.
Things I will do later in the future (with other Hack Club events, or with my own money):
- Numpad over SPI
- Macropad over SPI
Just use it like a keyboard! However, any SPI accessories should be connected while the keyboard is powered down. This is mainly a limitation of SPI, as it is not hot-plug compatible. The USB ports are USB 2.0 only, so it's better to be used for stuff like USB sound cards and mice. I don't actually know how much lag will the ports create, because they're bottom mounted, in direct contact with foam, and is air cooled. So it may overheat (tried to add thermal dissiptation vias but effectiveness not tested)
Quirks:
- Case has holes at the bottom for cooling (yes I'm serious)
Images
-
model + board
-
board only
Parts
52| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | Diode | Diode_SMD:D_SMA | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +8 |
| 22 | ~ | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.00u | S1, S2, S3, S10, S11, S12, S13, S14, S15, S16, S17, S20, S21, S22, S23, S24 +6 |
| 2 | NC3MAH | NC3MAH:NEUTRIK_NC3MAH | J9, J10 |
| 2 | ~ | PCM_Switch_Keyboard_Hotswap_Kailh:SW_Hotswap_Kailh_MX_1.50u_90deg | S18, S19 |
| 1 | D_Generic | Diode_SMD:D_SMA | D25 |
| 1 | Raspberry_Pi_Pico_THT | PCM_SL_Development_Boards:raspberry_pi_pico_THT | A1 |
Questions
How big is the Modulus Macropad PCB?
It measures 123.9 × 111.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Modulus Macropad use?
52 parts, built around the NC3MAH. 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 Modulus Macropad KiCad files?
From the advaitconty/Modulus repository on GitHub, at the commit this page was made from: the board is PCB/Modulus Macropad/Modulus Macropad.kicad_pcb and its schematic PCB/Modulus Keyboard/Modulus.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Modulus Macropad design in my own project?
Its repository states no licence, so its author keeps all rights: ask advaitconty before reusing the design.
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