Macropad

PulsePad

PulsePad is a 6 key macropad with an OLED Display. It also has 2 WS2812B Leds, and uses KMK firmware.

Features:

• Case with Snoopy on it!!
• 128x32 OLED Display (0.91in)
• 2 WS2812B RGB LEDs
• 6 Kailh low-profile switches

CAD Model:

Everything fits in together by slotting into the parts. I plan to improve the mounting mechanism in the future (and will likely have to fine tune some things once I have the PCB), but for now it just uses slot mechanisms.

There are 2 parts to the case: the top face and the bottom casing. I made it in Fusion360.

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

PCB

I made the PCB in KiCad, and used KiBuzzard to make the fun text.

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

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

I used Kailh's choc v2 key switch footprints, but used MX style spacing in this build.

Firmware Overview

This hackpad uses KMK firmware for everything.

• the 6 keys are currently used for media controls for music, screen brightness changers, and a layer switch.
• currently, I only have 1 layer implemented, but I'm going to be adding some more later on.
• the OLED currently displays layer # and I plan to add some woodstock animations in the future.

BOM:

• 6x Kailh Spring Mini Low-Profile Switches (I have these already, from another build)
• 6x Choc-v2 compatible Keycaps (I also have these already from another build)
• 2x WS2812B LEDs
• 1x 0.91" 128x32 OLED Display
• 1x EC11 Rotary Encoder
• 1x XIAO RP2040
• 1x Case (2 printed parts)