4 layers99 × 53.3 mm
PSLab
fossasia/pslab-hardware
PSLab Hardware Design and Schematics https://pslab.io
199 parts1.7kApache-2.0
2 layers87.5 × 81 mm
PCB edit 1
hilary-collab/My-hackpadMy first hardware project in the Stardance challenge ! But overall it is just a normal pcb and stuff.
- Size
- 87.5 × 81 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 19
- Pads
- 60
- Tracks, vias
- 101, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Jul 2026
- Updated
- 27 Oct 2026
Overview
PCB edit 1 is an open-source printed circuit board by hilary-collab, from the hilary-collab/My-hackpad repository on GitHub. It is a 2-layer board of 87.5 × 81 mm with 11 parts on 19 nets, routed with 101 tracks and 0 vias.
It is built around the WS2812B. Its parts include 6 switches, 2 ICs and 2 diodes.
Main components
1README
README.mdWhy not ?
Welcome to my custom Hackpad project. "Why not" is a 5 key macropad featuring a Rotary Encoder, an OLED screen, and 2 WS2812B Leds.
Features
- Controller: Seeed Studio XIAO RP2040
- Layout: 5 Physical Mechanical Switches + 1 Integrated Rotary Encoder Press
- Display: 0.91" I2C OLED Screen
- RGB Lighting: SK6812MINI-E Reverse-Mount LEDs
- Enclosure: Custom 3D-printable Top Layer designed in Onshape
QMK Firmware
This Hackpad used QMK Firmware- but certain changes might be make afterwards !
- Character Mode (SW1): Pressing the first switch dynamically changes the OLED state to wake up an animated character.
- Timer Mode (SW2): Features an onboard tracking stopwatch that can be toggled on/off.
- Smart Menu Navigation (SW3 & SW4): Use these dedicated directional switches to navigate Left/Right or Up/Down through the main menu.
- Settings Menu (SW5): Quickly jumps back to the Main Menu overlay.
- Interactive Double-Click Detection: Double-clicking the Rotary Encoder Press (SW6/D7) inside the Time or Date screen unlocks the editing state, allowing you to turn the knob to dynamically adjust clock values and day constraints.
PCB
Here is my pcb ! It is made in Kicad.
-schmetic
-routing
Case
I have used Onshape for my case. It is a simple sanwich case with hole made for type c on the right.
BOM
-Here are things you need to make "Why not?" !!!
- 1x Unsoldered Seeed Studio XIAO RP2040
- 5x MX-Style Mechanical Switches
- 1x EC11 Rotary Encoder
- 1x 0.91-inch OLED Display
- 2x SK6812 MINI-E LEDs
- 5x White Blank DSA Keycaps
- 4x M3x16mm Screws
- 4x M3x5mmx4mm Heatset Brass Inserts
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5 |
| 2 | WS2812B | LED_SMD:LED_SK6812MINI-E_3.2x2.8mm_P1.5mm_ReverseMount | D1, D2 |
| 1 | ER_OLEDM0.91_1x-I2C | Display:ER_OLEDM0.91_1x-I2C | U2 |
| 1 | LOGO | LOGO | G*** |
| 1 | MOUDLE-SEEEDUINO-XIAO | footprints:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM | U1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm_MountingHoles | SW6 |
Questions
How big is the PCB edit 1 PCB?
It measures 87.5 × 81 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PCB edit 1 use?
11 parts, built around the WS2812B. 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 PCB edit 1 KiCad files?
From the hilary-collab/My-hackpad repository on GitHub, at the commit this page was made from: the board is pcb/PCB edit 1.kicad_pcb and its schematic pcb/PCB edit 1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PCB edit 1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask hilary-collab before reusing the design.
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