2 layers217.3 × 393.8 mm
2 layers17.8 × 31.9 mm
Stemcell nopads
filterpaper/split_pcbs9Open source split PCB mods
- Size
- 17.8 × 31.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 56
- Pads
- 167
- Tracks, vias
- 364, 56
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 20 Sep 2021
- Updated
- 25 Aug 2022
Overview
Stemcell nopads is an open-source printed circuit board by filterpaper, from the filterpaper/split_pcbs repository on GitHub. It is a 2-layer board of 17.8 × 31.9 mm with 32 parts on 56 nets, routed with 364 tracks and 56 vias.
It is built around the XC6220B331MR. Its parts include 12 capacitors, 8 resistors, 4 connectors, 2 ICs and 2 diodes. It belongs with the keyboards and input boards and the STM32 boards of this library.
Main components
1README
Architeuthis dux/README.mdSimplified Architeuthis dux
Simplified versions of tapioki's Architeuthis dux with hotswap socket and puck support removed, fixed phantom drill holes
Instructions
To build an Architeuthis dux, you need the following:
- 2 pro-micro controllers (Elite-C or Pro-micro C)
- 2 PJ320A audio jack
- 1 male-to-male TRRS cable
- 34 Kailh choc v1 switches and keycaps
- Rubber feet or bumbers for the bottom
- Optional: low profile socket with Mill-max pins, or budget socket pins with round pin headers
Note: Architeuthis dux is a double sided PCB so controllers face down on the left and face up on the right.
QMK Firmware
To build the QMK firmware, run:
qmk compile -kb a_dux -km defaultParts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 100n | Capacitor_SMD:C_0402_1005Metric | C4, C5, C6, C7, C8, C12 |
| 3 | 10k | Resistor_SMD:R_0402_1005Metric | R6, R7, R8 |
| 3 | 4.7u | Capacitor_SMD:C_0402_1005Metric | C2, C3, C9 |
| 2 | 20p | Capacitor_SMD:C_0402_1005Metric | C10, C11 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 1 | 10u | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 1N5819 | Diode_SMD:D_SOD-323 | D2 |
| 1 | 220 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 2k2 | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 4.7k | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 500mA Fuse | Fuse:Fuse_0805_2012Metric | F1 |
| 1 | Boot0 | Button_Switch_SMD:SW_SPST_CK_KXT3 | SW1 |
| 1 | Down | stemcell:Pins5 | J4 |
| 1 | HSE1 8Mhz 12pF | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | LOGO | stemcell:arrow_4mm | G*** |
| 1 | Left | stemcell:Pins12 | J2 |
| 1 | Right | stemcell:Pins12 | J3 |
| 1 | STM32F4x1CxUx | Package_DFN_QFN:QFN-48-1EP_7x7mm_P0.5mm_EP5.6x5.6mm | U1 |
| 1 | USB C Connector | stemcell:USB-C-C168688 | J1 |
| 1 | XC6220B331MR | Package_TO_SOT_SMD:SOT-23-5 | U2 |
Questions
How big is the Stemcell nopads PCB?
It measures 17.8 × 31.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Stemcell nopads use?
32 parts, built around the XC6220B331MR. 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 Stemcell nopads KiCad files?
From the filterpaper/split_pcbs repository on GitHub, at the commit this page was made from: the board is STeMCell.v1.0.1/stemcell-nopads.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Stemcell nopads design in my own project?
Its repository states no licence, so its author keeps all rights: ask filterpaper before reusing the design.
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