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Numpad

rek·keyboards·03 - numpad/numpad/numpad.kicad_pcb

Numpad PCB layout, top view — open source RP2040/RP2350 board by rek

About the Numpad PCB

Numpad is an open source RP2040/RP2350 PCB design by rek, published on GitHub. It is a 2-layer board measuring 87.1 × 58.5 mm, with 19 components from 3 distinct parts.

Its main chip is the Raspberry_Pi_Pico, from the RP2040/RP2350 family. By type, the board carries 9 switches, 9 diodes and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

build notes and config for any keyboards i build

build notes and config for any keyboards i build

A nice intro: https://youtu.be/8WXpGTIbxlQ?si=IPm6OvvAeKLTbCmh

Then don't forget: https://docs.qmk.fm/faq_build#linux-udev-rules

- Cannot find the device? - Make sure you are using a data USB cable - Try USB-A not USB-C - For example Arduino Nano will not show up using a C-C cable

Main components on the Numpad

Raspberry_Pi_Pico

Numpad bill of materials (BOM)

19 components, 3 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Raspberry_Pi_Pico
U1
9
Keyswitch
S1, S2, S3, S4, S5, S6, S7, S8 +1
9
Diode
D1, D2, D3, D4, D5, D6, D7, D8 +1

Numpad design files

The KiCad project lives in the rek/keyboards repository on GitHub; these links point at the commit this page was built from.

Numpad: common questions

What microcontroller does the Numpad use?

The Numpad is built around the Raspberry_Pi_Pico, from the RP2040/RP2350 family.

How big is the Numpad PCB?

The Numpad measures 87.1 × 58.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Numpad?

19 components, from 3 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Numpad design files?

From the rek/keyboards repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Numpad design in my own project?

The repository has no license, so all rights stay with rek. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Numpad without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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