SingleBoard

OneBoard

OneBoard is a 20(ish) percent keyboard with a rotary encoder. It uses QMK firmware running on a RP2040.

Features:

• 3D printed outer case
• EC11 Rotary encoder for volume and general media control.
• 19 Keys

CAD Model:

We use 4 M3 Bolts and heatset inserts to put everything together. In total it has 2 separate peices.

<img src=Assets/Full.png alt="Schematic" width="500"/>

Made using Onshape: https://cad.onshape.com/documents/e6a77505b9b66916f410a9e2/w/3fad1cba9b12220fb1d6acfb/e/3a9642192f18001e0b7e9c0b?renderMode=0&uiState=69bc452a0bbfb517c13afba3

PCB

My PCB made in Kicad. I used KLE to design the keyboard layout and used a plugin to get everything laid out.

Schematic <img src=Assets/schematic.png alt="Schematic" width="300"/>

PCB <img src=Assets/PCB.png alt="Schematic" width="300"/>

Firmware Overview

This keyboard uses QMK firmware for everything.

• The rotary encoder changes volume, press the encoder to pause media.
• Basically acts like the left side of a full sized keyboard.

BOM:

All the materials needed for this hackpad:

• 19x Cherry MX Switches (16 supplied by Hackclub)
• 19x DSA Keycaps (16 supplied by Hackclub)
• 4x M3x5x4 Heatset inserts
• 4x M3x16mm SHCS Bolts
• 20x 1N4148 DO-35 Diodes. (16 supplied by Hackclub)
• 1x EC11 Rotary Encoder (supplied by Hackclub)
• 1x XIAO RP2040 (supplied by Hackclub)
• 1x Case (2 printed parts)