Kiwi board

mannireis·kiwi-board·pcb/steno.kicad_pcb

About the Kiwi board

Kiwi board is an open source RP2040/RP2350 PCB design by mannireis, published on GitHub under the MIT license. It is a 2-layer board measuring 268.7 × 76.2 mm, with 113 components from 16 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the NCP1117-3.3_SOT223 and W25Q128JVS. By type, the board carries 43 switches, 42 diodes, 16 capacitors, 6 resistors, 3 ICs and 2 connectors.

It belongs with the keyboards designs in this gallery.

From the project

a steno40% keyboard

The Kiwi Board is a 42-key split keyboard designed for stenographic input. It features a 3×6 column-staggered layout with 3 thumb keys per side. The design is based on the Polyglot keyboard and includes an integrated RP2040 microcontroller.

This project started after I discovered steno and wanted to build a keyboard tailored for learning and experimenting with chorded input.

Kiwi board, from the project README — From the project README

Main components on the Kiwi board

RP2040 NCP1117-3.3_SOT223 W25Q128JVS

Kiwi board bill of materials (BOM)

113 components, 16 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RP2040	QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm	U1
1	NCP1117-3.3_SOT223	SOT-223-3_TabPin2	U2
1	W25Q128JVS	SOIC-8_5.3x5.3mm_P1.27mm	U3
1	ABM8-272-T3	Crystal_SMD_Abracon_ABM8AIG-4Pin_3.2x2.5mm	Y1
1	USB_C_Receptacle_USB2.0_16P	USB_C_Receptacle_HCTL_HC-TYPE-C-16P-01A	J1
1	Conn_01x04	PinHeader_1x04_P2.54mm_Vertical	J2
42	SW_Push_45deg	MX-Hotswap-1U	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +34
1	SW_Push	SW_Push_1P1T_NO_CK_KMR2	SW44
42	D_Small	D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3, D4, D5, D6, D7, D8 +34
2	10u	C_0402_1005Metric	C1, C2
2	1u	C_0402_1005Metric	C3, C6
10	100n	C_0402_1005Metric	C4, C5, C7, C8, C9, C10, C11, C12 +2
2	15p	C_0402_1005Metric	C15, C16
2	27.4	R_0402_1005Metric	R1, R2
2	1k	R_0402_1005Metric	R3, R4
2	5.1k	R_0402_1005Metric	R5, R6

Kiwi board design files

The KiCad project lives in the mannireis/kiwi-board repository on GitHub; these links point at the commit this page was built from.

Kiwi board: common questions

What microcontroller does the Kiwi board use?

The Kiwi board is built around the RP2040, from the RP2040/RP2350 family.

How big is the Kiwi board?

The Kiwi board measures 268.7 × 76.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Kiwi board?

113 components, from 16 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 Kiwi board design files?

From the mannireis/kiwi-board 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 Kiwi board design in my own project?

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

Can I test firmware for the Kiwi board 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.