HardLabs

Sotka

pohjolaworks·Sotka

Sotka PCB layout, top view — open source AVR/Arduino board by pohjolaworks

About the Sotka PCB

Sotka is an open source AVR/Arduino PCB design by pohjolaworks, published on GitHub under the MIT license. It is a 2-layer board measuring 133.1 × 117.4 mm, with 68 components from 7 distinct parts.

Its main chip is the ProMicro, from the AVR/Arduino family. By type, the board carries 31 diodes, 30 relays, 4 connectors, 1 IC, 1 switch and 1 LED.

It belongs with the keyboards designs in this gallery.

From the project

Split mechanical keyboard with orthogonal layout and detachable extra row

Split mechanical keyboard with orthogonal layout and detachable extra row

Uses an RJ12 cable for serial communication between the halves.

Sotka, from the project README
From the project README

Main components on the Sotka

ProMicro

Sotka bill of materials (BOM)

68 components, 7 distinct parts.

QtyPartRefs
1
ProMicro
U1
2
Conn_01x10
J1, J2
2
6P6C
J3, J4
30
KEYSW
K1, K2, K3, K4, K5, K6, K7, K8 +22
1
Rotary_Encoder_Switch
SW1
1
WS2812B
RGB1
31
D
D2, D3, D4, D5, D6, D7, D8, D9 +23

Sotka design files

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

Sotka: common questions

What microcontroller does the Sotka use?

The Sotka is built around the ProMicro, from the AVR/Arduino family.

How big is the Sotka PCB?

The Sotka measures 133.1 × 117.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Sotka?

68 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Sotka design files?

From the pohjolaworks/Sotka repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Sotka design in my own project?

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

Can I test firmware for the Sotka without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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