Mist65

naaeell·Mist65·mist65/pcb/mist65.kicad_pcb

About the Mist65 PCB

Mist65 is an open source RP2040/RP2350 PCB design by naaeell, published on GitHub under the MIT license. It is a 2-layer board measuring 303.9 × 94.2 mm, with 137 components from 13 distinct parts.

Its main chip is the RP2040-ZERO, from the RP2040/RP2350 family. By type, the board carries 70 switches and 66 diodes.

It belongs with the keyboards designs in this gallery.

From the project

mist65 is a minimalist designed keyboard with 65 layouts, also using a micro controller that is easy to obtain

Part list | Name | Quantity | Description | | :-------------| :----------- | :------------------------- | | 1N4148 | 66 | DO-35 (1N4148 or similar). | | RP2040 Zero | 1 | RP2040 Zero (You can use all models, but first pay attention to the pinout). | | Kailh hotswap socket (optional) | 66 | if you want hotswap features and south facing switches. | | Mist65 PCB | 1 | Mist65 PCB is available for purchase here.|

Mist65 bill of materials (BOM)

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

Qty	Part	Footprint	Refs
1	RP2040-ZERO RP2040-Zero	RP2040-Zero	RZ1
1	MX_stab	STAB_MX_6.25u	S1
1	MX_stab	STAB_MX_2u	S2
2	MX_stab	STAB_MX_2.25u	S3, S4
52	1u	Kailh_socket_MX_optional	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +44
1	2u	Kailh_socket_MX_optional	SW14
2	1.5U 1.5u	Kailh_socket_MX_optional	SW15, SW28
1	1u	Kailh_socket_MX	SW29
2	1.75U 1.75u	Kailh_socket_MX_optional	SW30, SW55
2	2.25U 2.25u	Kailh_socket_MX_optional	SW42, SW44
5	1.25U 1.25u	Kailh_socket_MX_optional	SW58, SW59, SW60, SW62, SW63
1	6.25U 6.25u	Kailh_socket_MX_optional	SW61
66	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3, D4, D5, D6, D7, D8 +58

Mist65 design files

The KiCad project lives in the naaeell/Mist65 repository on GitHub; these links point at the commit this page was built from.

Layoutmist65/pcb/mist65.kicad_pcb
Schematicmist65/pcb/mist65.kicad_sch
BOMmist65/production files/BOM-mist65.csv

Mist65: common questions

What microcontroller does the Mist65 use?

The Mist65 is built around the RP2040-ZERO, from the RP2040/RP2350 family.

How big is the Mist65 PCB?

The Mist65 measures 303.9 × 94.2 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mist65?

137 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 Mist65 design files?

From the naaeell/Mist65 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 Mist65 design in my own project?

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

Can I test firmware for the Mist65 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.