Oskar Zither

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Oskar Zither

Basic Data

Category: Arduino

URL (first publication): https://gitlab.com/teamoskar/oskar_zither

Keywords: mobile braille keyboard smartphone blind

License: CERN Open Hardware License

Project status: Active

Technical documentation

Maturity of the project: production / DIY

Certification Status:

Contains PDF-drawings: Yes

CAD files are editable: Yes

Assembly instructions are published: Yes

Bill of materials is published: Yes


yes yes

Project management

Issue Management System: https://gitlab.com/teamoskar/oskar_zither/-/issues

Versioning System:https://gitlab.com/teamoskar/oskar_zither



Oskar Zither is a mobile braille-keyboard.

The arrangement of 8 keys in a braille cell block and two additional keys allows Oskar Zither to be controlled without a supporting surface.

Used license for Hardware documentation CERN-OHL-S v2 or later versions.

Used license for Firmware GPL-3.0 or later versions.

Technical documentation

Oskar Zither PCB Back PDF

Oskar zither pcb-brd-back png.png Oskar Zither PCB Back as PDF

Oskar Zither PCB Front PDF

Oskar zither pcb-brd-front png.png Oskar Zither PCB Front as PDF

Oskar Zither PCB Edge Cuts PDF

Oskar Zither PCB Edge Cuts as PDF

Oskar Zither PCB Schematic

Oskar zither pcb png.png


Zither nobg.png Oskar Zither case parts front, back and thumb plates in STL file format

DIN SPEC 3105 Attestation

Attestation of Compliance with DIN SPEC 3105-1

+ General Reviews General Reviews

Parts list

Pos. Qty. Part Name Part code Part Type Specifications Review Status Show All Comments
0 Oskar Zither entire Project

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Item Reviews
1 1 Case Production

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Item Reviews
1.1 60 g PLA Buy https://www.adafruit.com/product/2080

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Item Reviews
1.2 4 Screws Buy Clipboard Screws, 3 x 16 mm, DIN 7505-A


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2 1 PCB Complete System Production

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Item Reviews
2.1 1 PCB Buy Dimension: 67.4mm x 70.5mm

Layer count: 2

Base material: FR4 TG 140°

Nominal Thickness include Copper Cladding: 1.6 mm


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Item Reviews
2.2 10 Switches Buy Kailh Choc low profile Switch tactile, brown CPG135001D02


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Item Reviews
2.3 10 Keycaps Buy Kailh Choc low profile Keycaps


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2.4 1 Arduino Micro Buy https://store.arduino.cc/arduino-micro

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2.5 1 Resistor Buy Axial, through-hole Resistor 1 kOhm, 1/4 Watt


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2.6 1 USB-OTG Cable USB-Micro-B-Connector Buy for USB-Micro-B-Connector: https://www.adafruit.com/product/3610

for iPhone: "Apple Camera Adapter Lightning to USB 3" https://smile.amazon.de/Lightning-to-USB3-Camera-Adapter/dp/B01DGDNL2G/

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