hackpad/hackpads/RGBar

RGBar

RGBoard is an 8 key macropad with a rotary encoder. Each key is backlit with a SK6812 reverse mounted neopixel.

Inspiration

I wanted to make something sleek and minimalist - kinda like a streamdeck, but with keys. I couldn't resist the RGB temptation though... oh well. More is better than less, right?

Challenges

Since this was my first ever PCB, routing and learning the process took a looong time... Also, writing firmware without testing was a bit unorthodox, it it's probably fine...

Features

• 3D printed case
• EC11 rotary encoder
• 8 keys w/ rgb backlighting

CAD

The top and bottom are assembled using 4 M3 bolts and heated inserts.

Here's a top view:

PCB

The PCB was made in KiCad - the board is powered by a Seeed Studio XIAO RP2040.

Here's the schematic:

...and the PCB:

Firmware

This hackpad uses KMK firmware. Currently, RGBar just acts like a numpad (with backlighting on press) and the rotary encoder adjusts screen brightness, but it can be reprogrammed to do much more...

BOM

Custom Components

• 1x Custom PCB
• 1x 3D printed case (top, bottom, and knob)
• 8x 3D printed keycaps (...or any other keycap for Cherry MX switches)

COTS Components

• 8x Cherry MX switches (4 clicky and 4 linear as a personal preference~)
• 8x 1N4148 Diodes (through hole)
• 8x SK6812 MINI-E LEDs
• 1x EC11 Rotary encoder
• 1x Seeed XIAO RP2040 (through hole)
• 14x Male headers
• 4x M3 x 6mm Screws
• 4x M3x5mx4mm heatset inserts

Extra stuff

I built this as a part of Hack Club's Hackpad program. I haven't tested any of it yet, since I don't currently have the parts~