hackpad/hackpads/ScrollPad

ScrollPad

ScrollPad lets you control your laptop from anywhere. I keep having to move to my desk when I'm at my workbench, just to scroll down on my laptop, so this is supposed to change that.

Features

• Mouse scroll keys (Scroll: Left, Right, Up, Down) + enter, for navigation
• Volume and media controls (Previous, Next, Volume Up/Down) when holding down the enter/middle key
• KMK firmware with MouseKeys
• RGB layer indication
• Ikea Skadis Hackpad Holder

Firmware Overview

The firmware is written in Python using KMK. It uses a dual-layer keymap which can be switched by holding the KC.LT key (the enter/middle key). It also has RGB layer indication.

PCB

Here's a picture of the schematic and the PCB

Schematic	PCB

Case

The case and the Ikea Skadis holder I made in Onshape:

Case	Case + Ikea Skadis holder

TODO

I found this YSWS like 2 days before it's end, so I still want to add/change a few things:

• LED Layer Indication: LED color should show active layer Done

• Mouse Scrolling Functionality: Potentially port to QMK in order to use mouse scrolls as control instead of arrow keys Done with KMK Mouse Keys

• Change LED position on PCB: Move the LEDs so their light isn't blocked by the case Done

• Add PCB mounting holes: Add M3 mounting holes on the PCB and the case Done

• Improve PCB routing: Change the PCB routing so it's slightly prettier to look at and work with Done

• Fix the case cover: Change the x/y of the cover so it actually fits on the base Done

• Add PCB spacer: Add a spacer that lifts the PCB of the bottom so the port of the chip is reachable Done

• Ikea Skadis Holder: Create an Ikea Skadis compatible(using the T-nuts mounting system) holder for this HackPad Done

BOM

Approved parts:

• XIAO RP2040
• 5x Cherry MX switches
• 5x DSA keycaps(white)
• 4x SK6812 MINI-E LEDs
• 5x M3x5x4mm heatset inserts