K90r

shubhamp2007·k90r·pcb/Keyboard.kicad_pcb

About the K90r PCB

K90r is an open source RP2040/RP2350 PCB design by shubhamp2007, published on GitHub under the MIT license. It is a 2-layer board measuring 345 × 155 mm, with 275 components from 14 distinct parts.

Its main chip is the Raspberry_Pi_Pico, from the RP2040/RP2350 family. By type, the board carries 90 switches, 90 diodes, 90 inductors, 2 resistors, 1 IC and 1 connector.

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

From the project

A Custom Keyboard featuring 90 Keys ( Including Rotary Encoder ), a 0.91 128x32 OLED display, powered by Rasberry Pi Pico and KMK firmware

A Custom 90 Keys Keyboard including Rotary Encoder Switch, OLED powered by Rasberry Pi Pico MCU and KMK Firmware.

- Per-Key RGB LED - Hotswap Sockets - OLED Display - Rotary Encoder

- Firmware: KMK - Symbols and FootPrints: ScottoKicad - PCB Software: Kicad - 3D Design Software: Autodesk Fusion 360

K90r, from the project README — From the project README

Main components on the K90r

Raspberry_Pi_Pico

K90r bill of materials (BOM)

275 components, 14 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	Raspberry_Pi_Pico	Raspberry_Pi_Pico	U1
1	OLED_128X32 OLED_128x32	OLED_128x32	J1
78	SW_Push	Hotswap_MX_1.00u	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +70
1	RotaryEncoder_Switch	Encoder_EC11_MX_Combo_1	SW17
1	SW_Push	Hotswap_MX_2.00u	SW31
2	SW_Push	Hotswap_MX_1.50u	SW34, SW47
2	SW_Push	Hotswap_MX_1.75u	SW50, SW76
2	SW_Push	Hotswap_MX_2.25u	SW62, SW65
3	SW_Push	Hotswap_MX_1.25u	SW80, SW81, SW82
1	SW_Push	Hotswap_MX_6.25u	SW83
90	D	Diode_DO-35	D1, D2, D3, D4, D5, D6, D7, D8 +82
90	SK6812MINI	LED_SK6812MINI	L1, L2, L3, L4, L5, L6, L7, L8 +82
1	C	C_Axial_L5.1mm_D3.1mm_P15.00mm_Horizontal	C1
2	R	R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal	R1, R2

K90r design files

The KiCad project lives in the shubhamp2007/k90r repository on GitHub; these links point at the commit this page was built from.

K90r: common questions

What microcontroller does the K90r use?

The K90r is built around the Raspberry_Pi_Pico, from the RP2040/RP2350 family.

How big is the K90r PCB?

The K90r measures 345 × 155 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the K90r?

275 components, from 14 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 K90r design files?

From the shubhamp2007/k90r 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 K90r design in my own project?

Yes, under the terms of its MIT license, which shubhamp2007 chose for the repository.

Can I test firmware for the K90r 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.