Hackpad

Macropad

<img src=assets/pcb3d.png alt="Schematic" width="500"/>

Macropad is a 6 key pad with a rotary encoder, an OLED display and 12 LED's. It uses KMK firmware.

It is inspired by the Hackpad YSWS (which has now ended so it is a now a hackpad blueprint)

Features

• 3D printed custom case that is angled towards the user for easier use.
• 6 MX switches.
• 12 RGB LED's.
• A rotary encoder.
• A 128x32 OLED display.

CAD Model for Case

It is screwed in using 3 M3 bolts and heatset inserts. It has a 10 degree tilt.

It is all one complete part with an open top to showcase the pcb and components.

<img src=assets/cad.png alt="Schematic" width="500"/>

Made in Solidworks.

PCB

My PCB was designed in KiCad.

It was a challenge trying to route it all as I've never created a PCB before so ignore the messy wiring.

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

<img src=assets/pcb.png alt="Schematic" width="300"/>

Firmware Overview

It uses KMK firmware and may in the future be upgraded to QMK if I learn how to use it.

• The rotary encoder changes volume and is pressed to change layer.
• The 6 keys currently are assigned differently for each layer - Base (Gaming), Function, Media
• The OLED just tells you what layer your on and will in future have pictures or custom icons on there - maybe even temps if I can get that to work

BOM

• 6x Cherry MX Switches
• 6x DSA Keycaps
• 3x M3x5x4 Heatset inserts
• 3x M3x16mm SHCS Bolts
• 6x 1N4148 DO-35 Diodes
• 12x WS2812B LEDs
• 1x 0.91" 128x32 OLED Display
• 1x EC11 Rotary Encoder
• 1x XIAO RP2040
• 1x Case (3D PrinteD)