HardLabs

Rp2350-macropad

arkandas·rp2350-macropad·Kicad/RP2350A_Macropad.kicad_pcb

Rp2350-macropad PCB layout, top view — open source RP2040/RP2350 board by arkandas

About the Rp2350-macropad PCB

Rp2350-macropad is an open source RP2040/RP2350 PCB design by arkandas, published on GitHub under the MIT license. It is a 2-layer board measuring 71.4 × 99.7 mm, with 80 components from 43 distinct parts.

Its main chip is the RP2350_60QFN, from the RP2040/RP2350 family. Other key parts include the W25Q32JVZPIQ, RT6150AGQW, JST DEBUG, ABM8-272-T3 and AHT20-F. By type, the board carries 22 capacitors, 19 resistors, 11 switches, 11 diodes, 7 ICs and 3 LEDs.

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

From the project

RP2350A 3x3 mechanical macropad with a browser-programmable keymap and an on-board status LCD

A 3x3 mechanical macropad built around the Raspberry Pi RP2350A. It enumerates as a standard USB HID keyboard plus a USB CDC serial port, so each of the nine keys sends a configurable HID keycode and modifier combination. The key map is programmed over the serial port from a small web app, with no need to recompile or reflash the firmware to change it.

The board also drives a 1.14 inch ST7789 LCD that shows live temperature and humidity from an AHT20 sensor, basic system info (CPU clock, static RAM, uptime) and the current 3x3 key map. Three SK6805 RGB LEDs report status: power, caps lock…

Rp2350-macropad, from the project README
From the project README

Main components on the Rp2350-macropad

W25Q32JVZPIQRT6150AGQWJST DEBUGRP2350_60QFNABM8-272-T3AHT20-F74AHCT1G125GV

Rp2350-macropad bill of materials (BOM)

80 components, 43 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
W25Q32JVZPIQ
U1
1
RT6150AGQW
U2
1
JST DEBUG
U3
1
RP2350_60QFN
U4
1
ABM8-272-T3
U5
1
AHT20-F
U6
1
74AHCT1G125GV
U7
1
MMBT2222ALT1G
Q1
1
UART Pinout
J1
1
1.1A fuse
F1
1
N114-2413THBIG01-H13
LCD1
1
BOOT
SW1
9
MX2A-11NW
SW_Push
CHERRY
SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 +1
1
RUN
SW11
1
TYPE-C 16PIN
USB1
3
SK6805-EC20
LED1, LED2, LED3
9
1N4148W
D1, D2, D3, D4, D5, D6, D8, D9 +1
1
MBR120VLSFT1G
D7
1
USBLC6-2SC6
D11
1
2U2
2u2
L1
Show 23 more
QtyPartRefs
1
3.3U
3.3u
L2
2
47UF
47uF
C1, C6
1
100N
100n
C2
2
4.7UF
4.7uF
C3, C4
5
100N
100n
C5, C9, C10, C20, C22
2
4.7UF
4.7uF
C7, C8
2
15P
15p
C11, C12
6
100n
C13, C14, C15, C16, C17, C18
2
100NF
100nF
C19, C21
2
1K
R1, R15
2
5.1K
R2, R3
1
10K
10k
R4
2
100K
100k
R5, R6
1
487K
487k
R7
1
86.6K
86.6k
R8
1
33OHM
33ohm
R9
1
10K
10k
R10
2
27OHM
27ohm
R11, R12
1
10K
R13
1
1K
R14
1
22OHM
22ohm
R16
2
4.7K
4.7k
R17, R18
1
100OHM
100ohm
R19

Rp2350-macropad design files

The KiCad project lives in the arkandas/rp2350-macropad repository on GitHub; these links point at the commit this page was built from.

Rp2350-macropad: common questions

What microcontroller does the Rp2350-macropad use?

The Rp2350-macropad is built around the RP2350_60QFN, from the RP2040/RP2350 family.

How big is the Rp2350-macropad PCB?

The Rp2350-macropad measures 71.4 × 99.7 mm, has 2 copper layers and is 1 mm thick.

How many components are on the Rp2350-macropad?

80 components, from 43 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 Rp2350-macropad design files?

From the arkandas/rp2350-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 Rp2350-macropad design in my own project?

Yes, under the terms of its MIT license, which arkandas chose for the repository.

Can I test firmware for the Rp2350-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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