HardLabs

Macropad

cheyao·macropad·PCB/macropad.kicad_pcb

Macropad PCB layout, top view — open source RP2040/RP2350 board by cheyao

About the Macropad PCB

Macropad is an open source RP2040/RP2350 PCB design by cheyao, published on GitHub under the Zlib license. It is a 2-layer board measuring 80.5 × 100 mm, with 45 components from 8 distinct parts.

Its main chip is the SEEEDUINO XIAO RP2040, from the RP2040/RP2350 family. By type, the board carries 20 diodes, 16 switches, 5 capacitors, 2 resistors, 1 IC and 1 LED.

It belongs with the keyboards and displays & leds designs in this gallery.

From the project

A simple Macropad

- KiCad - Made a ton of revisions - OpenSCAD then FreeCAD (Fusion 360 doesn't work on my mac lol) Got like 400 constraints in my freecad project - Python firmware

Interactive bom at PCB/production/ibom.html

NOTE: I will need a 0.96” SSD1306 OLED screen that accepts 5V with 3.3V logic

The resistors are allso probably optional - but suggested by reddit

Macropad, from the project README
From the project README

Main components on the Macropad

SEEEDUINO XIAO RP2040

Macropad bill of materials (BOM)

45 components, 8 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
SEEEDUINO XIAO RP2040
U2
16
Kailh Choc V2
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +8
1
SSD1306
Brd1
16
Didode 1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +8
4
SK6812MINI
D17, D18, D21, D22
4
0.1UF
0.1uF
C1, C3, C4, C5
1
1UF
1uF
C2
2
4.7K
4.7k
R1, R2

Macropad design files

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

Macropad: common questions

What microcontroller does the Macropad use?

The Macropad is built around the SEEEDUINO XIAO RP2040, from the RP2040/RP2350 family.

How big is the Macropad PCB?

The Macropad measures 80.5 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Macropad?

45 components, from 8 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 Macropad design files?

From the cheyao/macropad 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 Macropad design in my own project?

Yes, under the terms of its Zlib license, which cheyao chose for the repository.

Can I test firmware for the Macropad 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.

Similar boards