HardLabs

Otis34

indianpojken·otis34·kicad/otis34.kicad_pcb

Otis34 PCB layout, top view — open source AVR/Arduino board by indianpojken

About the Otis34 PCB

Otis34 is an open source AVR/Arduino PCB design by indianpojken, published on GitHub. It is a 2-layer board measuring 211.5 × 72.4 mm, with 70 components from 4 distinct parts.

Its main chip is the Arduino_Pro_Micro, from the AVR/Arduino family. By type, the board carries 34 switches, 34 diodes, 1 IC and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

34-key unibody keyboard w/ hotswappable choc v1 switches

A minimalist, not so ergonomic 34-key keyboard designed for portability. Features a unibody layout and support for Kailh Choc V1 low-profile switches via hotswap sockets and OLED.

Otis34, from the project README
From the project README

Main components on the Otis34

Arduino_Pro_Micro

Otis34 bill of materials (BOM)

70 components, 4 distinct parts.

QtyPartRefs
1
Arduino_Pro_Micro
U1
1
OLED_128x32
J2
34
Keyswitch
S1, S2, S3, S4, S5, S6, S7, S8 +26
34
Diode
D1, D2, D3, D4, D5, D6, D7, D8 +26

Otis34 design files

The KiCad project lives in the indianpojken/otis34 repository on GitHub; these links point at the commit this page was built from.

Otis34: common questions

What microcontroller does the Otis34 use?

The Otis34 is built around the Arduino_Pro_Micro, from the AVR/Arduino family.

How big is the Otis34 PCB?

The Otis34 measures 211.5 × 72.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Otis34?

70 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the Otis34 design files?

From the indianpojken/otis34 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Otis34 design in my own project?

The repository has no license, so all rights stay with indianpojken. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Otis34 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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