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4keys hackpad

shreyashsah007-sss·4keys-hackpad·pcb/trying.kicad_pcb

4keys hackpad PCB layout, top view — open source RP2040/RP2350 board by shreyashsah007-sss

About the 4keys hackpad PCB

4keys hackpad is an open source RP2040/RP2350 PCB design by shreyashsah007-sss, published on GitHub. It is a 2-layer board measuring 42 × 80 mm, with 8 components from 4 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 5 switches, 2 diodes and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

I designed and engineered a custom 4-key macropad from scratch to streamline my workflow in coding and CAD. The device uses a Seeed XIAO RP2040 microcontroller running CircuitPython with the KMK firmware library, allowing for instant key-remapping without recompiling code.

4keys hackpad, from the project README
From the project README

Main components on the 4keys hackpad

XIAO-RP2040-DIP

4keys hackpad bill of materials (BOM)

8 components, 4 distinct parts.

QtyPartRefs
1
XIAO-RP2040-DIP
U2
4
SW_Push
SW1, SW2, SW3, SW4
1
RotaryEncoder_Switch
SW5
2
SK6812MINI
D1, D2

4keys hackpad design files

The KiCad project lives in the shreyashsah007-sss/4keys-hackpad repository on GitHub; these links point at the commit this page was built from.

4keys hackpad: common questions

What microcontroller does the 4keys hackpad use?

The 4keys hackpad is built around the XIAO-RP2040-DIP, from the RP2040/RP2350 family.

How big is the 4keys hackpad PCB?

The 4keys hackpad measures 42 × 80 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 4keys hackpad?

8 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the 4keys hackpad design files?

From the shreyashsah007-sss/4keys-hackpad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the 4keys hackpad design in my own project?

The repository has no license, so all rights stay with shreyashsah007-sss. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the 4keys hackpad 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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