HardLabs

Keyboard

vamshikrishnaramasamy·oso-keyboard·references/existing-75-cad/annovax75/PCB/keyboard.kicad_pcb

Keyboard PCB layout, top view — open source RP2040/RP2350 board by vamshikrishnaramasamy

About the Keyboard PCB

Keyboard is an open source RP2040/RP2350 PCB design by vamshikrishnaramasamy, published on GitHub under the MIT license. It is a 2-layer board measuring 323.9 × 131 mm, with 169 components from 13 distinct parts.

Its main chip is the ESP32-S3-WROOM-1U-N16, from the RP2040/RP2350 family. By type, the board carries 83 switches, 83 diodes, 2 connectors and 1 IC.

It belongs with the keyboards and iot & wireless designs in this gallery.

From the project

Demo: https://vamshikrishnaramasamy.github.io/oso-keyboard/

Demo: https://vamshikrishnaramasamy.github.io/oso-keyboard/

Repository/README: https://github.com/vamshikrishnaramasamy/oso-keyboard

OSO Keyboard is an open-source 75% mechanical keyboard project with a custom ESP32-S3 programmable PCB target, USB/BLE/Wi-Fi firmware plans, and parametric CAD.

- 82-key 75% ANSI layout with a flush hot-swappable OSO module bay - Onboard ESP32-S3-WROOM-1U module as the main brain - USB-C - 10-contact programmable module dock replacing the Esc/F1 corner - ESP-IDF/TinyUSB wired firmware target, with BLE/Wi-Fi config planned - MX hotswap switch footprints -…

Main components on the Keyboard

ESP32-S3-WROOM-1U-N16

Keyboard bill of materials (BOM)

169 components, 13 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-WROOM-1U-N16
RaspberryPi_Pico
U1
1
Conn_01x06_Pin
J1
1
Conn_01x02_Pin
J2
71
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +63
1
RotaryEncoder_Switch
SW15
1
SW_Push
SW29
2
SW_Push
SW31, SW44
2
SW_Push
SW46, SW71
2
SW_Push
SW58, SW60
3
SW_Push
SW74, SW75, SW76
1
SW_Push
SW77
82
1N4148W
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +74
1
1N4148
D83

Keyboard design files

The KiCad project lives in the vamshikrishnaramasamy/oso-keyboard repository on GitHub; these links point at the commit this page was built from.

Keyboard: common questions

What microcontroller does the Keyboard use?

The Keyboard is built around the ESP32-S3-WROOM-1U-N16, from the RP2040/RP2350 family.

How big is the Keyboard PCB?

The Keyboard measures 323.9 × 131 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Keyboard?

169 components, from 13 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 Keyboard design files?

From the vamshikrishnaramasamy/oso-keyboard repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Keyboard design in my own project?

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

Can I test firmware for the Keyboard 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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