Seed75

ikrishagarwal·Seed75·PCB/seed75.kicad_pcb

About the Seed75 PCB

Seed75 is an open source RP2040/RP2350 PCB design by ikrishagarwal, published on GitHub under the AGPL-3.0 license. It is a 2-layer board measuring 317.8 × 133.5 mm, with 168 components from 11 distinct parts.

Its main chip is the RaspberryPi_Pico, from the RP2040/RP2350 family. By type, the board carries 83 switches, 83 diodes, 1 module and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

A hand crafted 75% mechanical keyboard

A completely hand made 75% mechanical keyboard from PCB to case, even the firmware.

- 75% Layout - Hot Swappable Sockets - Sleep Design - Customizable Push Knob - USB C Port - Detachable Angle Elevation - Sandwich Mount - Wrist Rest

This project is licensed under the AGPL-3.0 License.

Seed75, from the project README — From the project README

Main components on the Seed75

RaspberryPi_Pico

Seed75 bill of materials (BOM)

168 components, 11 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	RaspberryPi_Pico	Raspberry_Pi_Pico	A1
1	CONN_01X06_PIN Conn_01x06_Pin	Wago_734-136_1x06_P3.50mm_Vertical	J1
71	SW_Push	SW_Hotswap_Kailh_MX_Plated_1.00u_With_Switch	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +63
1	RotaryEncoder_Switch	Encoder_EC11_MX_Combo	SW15
1	SW_Push	SW_Hotswap_Kailh_MX_Plated_2.00u_With_Switch	SW29
2	SW_Push	SW_Hotswap_Kailh_MX_Plated_1.50u_With_Switch	SW31, SW44
2	SW_Push	SW_Hotswap_Kailh_MX_Plated_1.75u_With_Switch	SW46, SW71
2	SW_Push	SW_Hotswap_Kailh_MX_Plated_2.25u_With_Switch	SW58, SW60
3	SW_Push	SW_Hotswap_Kailh_MX_Plated_1.25u_With_Switch	SW74, SW75, SW76
1	SW_Push	SW_Hotswap_Kailh_MX_Plated_6.25u_With_Switch	SW77
83	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3, D4, D5, D6, D7, D8 +75

Seed75 design files

The KiCad project lives in the ikrishagarwal/Seed75 repository on GitHub; these links point at the commit this page was built from.

Seed75: common questions

What microcontroller does the Seed75 use?

The Seed75 is built around the RaspberryPi_Pico, from the RP2040/RP2350 family.

How big is the Seed75 PCB?

The Seed75 measures 317.8 × 133.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Seed75?

168 components, from 11 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 Seed75 design files?

From the ikrishagarwal/Seed75 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 Seed75 design in my own project?

Yes, under the terms of its AGPL-3.0 license, which ikrishagarwal chose for the repository.

Can I test firmware for the Seed75 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.