Krunchboard-90

krunchiekrunch·krunchboard-90·kicad9-pcb/krunchboard-90/krunchboard-90.kicad_pcb

About the Krunchboard-90 PCB

Krunchboard-90 is an open source RP2040/RP2350 PCB design by krunchiekrunch, published on GitHub under the Custom license license. It is a 2-layer board measuring 324 × 122.1 mm, with 187 components from 9 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 92 switches, 91 diodes, 2 resistors, 1 module and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

A custom 75% (84+4+1) sandwich-mount ANSI mechanical keyboard powered by a Raspberry Pi Pico with KMK

KLE%0A0&=%2F%0A-&=+%0A%2F=&a:6&w:2%3B&=Backspace&=Home&a:7%3B&=%3B&@a:4&w:1.5%3B&=Tab&=Q&=W&=E&=R&=T&=Y&=U&=I&=O&=P&=%7B%0A%5B&=%7D%0A%5D&w:1.5%3B&=%7C%0A%5C&a:6%3B&=Page%20Up&a:7%3B&=%3B&@a:4&w:1.75%3B&=Caps%20Lock&=A&=S&=D&=F&=G&=H&=J&=K&=L&=%2F:%0A%2F%3B&=%22%0A'&a:6&w:2.25%3B&=Enter&=Page%20Down&a:7%3B&=%3B&@a:6&w:2.25%3B&=Shift&a:4%3B&=Z&=X&=C&=V&=B&=N&=M&=%3C%0A,&=%3E%0A.&=%3F%0A%2F%2F&a:6&w:1.75%3B&=Shift&a:7%3B&=%E2%86%91&a:6%3B&=End&a:7%3B&=%3B&@a:6&w:1.25%3B&=Ctrl&w:1.25%3B&=Win&w:1.25%3B&=Alt&a:7&w:6.25%3B&=&a:6%3B&=Alt&=Fn&=Ctrl&a:7%3B&=%E2%86%90&=%E2%86%93&=%E2%86%92&=)

Krunchboard-90, from the project README — From the project README

Main components on the Krunchboard-90

RaspberryPi_Pico

Krunchboard-90 bill of materials (BOM)

187 components, 9 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RaspberryPi_Pico	RaspberryPi_Pico_SMD	A1
1	USB_C_Receptacle_USB2.0_16P	USB_C_Receptacle_HCTL_HC-TYPE-C-16P-01A	J1
89	SW_Push_45deg	Kailh_socket_MX_platemount_plated	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +81
1	RotaryEncoder_Switch	RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm	SW17
1	BOOTSEL	SW_SPST_TS-1088-xR025	SW91
1	RST	SW_SPST_TS-1088-xR025	SW92
90	1N4148W	D_SOD-123	D1, D2, D3, D4, D5, D6, D7, D8 +82
1	Diode	D_SOD-323_HandSoldering	D91
2	R512/R472	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R1, R2

Krunchboard-90 design files

The KiCad project lives in the krunchiekrunch/krunchboard-90 repository on GitHub; these links point at the commit this page was built from.

Layoutkicad9-pcb/krunchboard-90/krunchboard-90.kicad_pcb
Schematickicad9-pcb/krunchboard-90/krunchboard-90.kicad_sch
BOMBOM.csv

Krunchboard-90: common questions

What microcontroller does the Krunchboard-90 use?

The Krunchboard-90 is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the Krunchboard-90 PCB?

The Krunchboard-90 measures 324 × 122.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Krunchboard-90?

187 components, from 9 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 Krunchboard-90 design files?

From the krunchiekrunch/krunchboard-90 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 Krunchboard-90 design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Krunchboard-90 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.