HardLabs

Nitro-Macropad

conn653·Nitro-Macropad·PCB/Nitro-Macropadv2_pcb.kicad_pcb

Nitro-Macropad PCB layout, top view — open source RP2040/RP2350 board by conn653

About the Nitro-Macropad PCB

Nitro-Macropad is an open source RP2040/RP2350 PCB design by conn653, published on GitHub. It is a 2-layer board measuring 77.1 × 87.9 mm, with 21 components from 5 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 10 switches, 9 diodes, 1 IC and 1 connector.

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

From the project

A custom 9-key macro pad with encoder and 0.91inch OLED display, using Seeed XIAO RP2040 and KMK Firmware

9 Mechanical Keys (Cherry MX footprint) Rotary Encoder for volume/scrolling OLED Display (0.91" I2C) QMK/KMK Compatible

/PCB: KiCad schematic and PCB layout. /Case: 3D printable case files (STEP). /Firmware: KMK (CircuitPython) configuration code. /Production: Everything you need to replicate the Nitro-Macropad.

Nitro-Macropad, from the project README
From the project README

Main components on the Nitro-Macropad

XIAO-RP2040-DIP

Nitro-Macropad bill of materials (BOM)

21 components, 5 distinct parts.

QtyPartRefs
1
XIAO-RP2040-DIP
U1
1
Conn_01x04
J1
9
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +1
1
RotaryEncoder_Switch
SW10
9
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +1

Nitro-Macropad design files

The KiCad project lives in the conn653/Nitro-Macropad repository on GitHub; these links point at the commit this page was built from.

Nitro-Macropad: common questions

What microcontroller does the Nitro-Macropad use?

The Nitro-Macropad is built around the XIAO-RP2040-DIP, from the RP2040/RP2350 family.

How big is the Nitro-Macropad PCB?

The Nitro-Macropad measures 77.1 × 87.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Nitro-Macropad?

21 components, from 5 distinct parts. The full bill of materials is listed on this page.

Where can I download the Nitro-Macropad design files?

From the conn653/Nitro-Macropad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Nitro-Macropad design in my own project?

The repository has no license, so all rights stay with conn653. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Nitro-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.

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