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2 layers97.6 × 66.7 mmTWPad, the printed circuit board in 3D

TWPad is a macropad with 7 btns and 2 Rotary Encoders 11 Leds 4 status leds 7 underkey lighting

Size
97.6 × 66.7 mm
Copper layers
2
Thickness
1.6 mm
Parts
30
Nets
34
Pads
169
Tracks, vias
274, 16
Routed
Yes
KiCad
KiCad 9.0 (file 20241229)
Created
27 Nov 2025
Updated
25 Dec 2025

Overview

TWPad is an open-source printed circuit board by ThorWolf21, from the ThorWolf21/TWPad repository on GitHub, published under the MIT licence. It is a 2-layer board of 97.6 × 66.7 mm with 30 parts on 34 nets, routed with 274 tracks and 16 vias.

It is built around the SK6812MINI-E. Its parts include 20 diodes, 9 switches and 1 IC. It belongs with the keyboards and input boards and the RP2040 boards of this library.

Main components

1

README

README.md

TWPad

TWPad is a 7 key 2 Rotary encoder macropad. It has per key leds(Not under the rotary encoders) + 4 status/ambient leds, using SK6812MINI-E leds

It is an entry to the hackpad program


📂 Part of my Project Portfolio

Check out my other keyboards and projects!


Features

  • 3D printed case
  • 2 EC11 Rotary encoders for volume and others
  • 11 SK6812MINI-E leds. 7 for per key lighting and 4 for status/ambient lighting
  • 7 keys

CAD Model

Here is some pictures of the parts and the testfit

Top-plate:

<img src=Assets/TWPad_CAD-Top.png alt="top plate cad" width="500">

Bottom/case:

<img src=Assets/TWPad_CAD-Bottom.png alt="bottom/case cad" width="500">

Testfit:

<img src=Assets/TWPad_CAD-Testfit.png alt="testfit cad" width="500">


PCB

Here is the pcb i designed for my macropad

Schematic:

<img src=Assets/Schematic_TW_v1.0.png alt="Schematic" width="500">

PCB:

<img src=Assets/Pcb_TW_v1.0.png alt="PCB" width="500">


Firmware

KMK

3 layers 7 Btns 1 RotEnc per layer one rotary encoder is used for layerswitching

I have not finalized the macros because i dont know what i want


BOM

I am pretty sure this is everything:

  • 7x Cherry MX Switches
  • 7x DSA keycaps
  • 9x Through-hole 1N4148 Diodes
  • 11x SK6812 MINI-E LEDs
  • 2x EC11 Rotary Encoders
  • 1x Seeed XIAO RP2040
  • 1x Case (2x 3d printed parts)
  • 4x M3x16mm screws
  • 4x M3x5mx4mm heatset inserts

Parts

30
QtyValueFootprintReferences
91N4148Diode_THT:D_DO-35_SOD27_P7.62mm_HorizontalD1, D2, D3, D4, D5, D6, D7, D8, D9
7~Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCBS2, S4, S5, S6, S7, S8, S9
4SK6812MINIkicad-keyboard-parts.pretty-master:MX_SK6812MINI-ED17, D18, D19, D20
4SK6812MINIkicad-keyboard-parts.pretty-master:MX_SK6812MINI-E_REVD10, D14, D15, D16
3SK6812MINIkicad-keyboard-parts.pretty-master:MX_SK6812MINI-E_REV_RotD11, D12, D13
2RotaryEncoder_SwitchRotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mmSW1, SW3
1MCU_Seeed_XIAO_RP2040Seeed Studio XIAO Series Library:XIAO-MG24-DIPU1

Questions

How big is the TWPad PCB?

It measures 97.6 × 66.7 mm and has 2 copper layers, 1.6 mm thick.

What parts does the TWPad use?

30 parts, built around the SK6812MINI-E. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the TWPad KiCad files?

From the ThorWolf21/TWPad repository on GitHub, at the commit this page was made from: the board is PCB/TWPad.kicad_pcb and its schematic PCB/TWPad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the TWPad design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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