2 layers243.2 × 106 mm
2 layers323.9 × 95.1 mm
UnSplit
swiftrax/UnSplit68Ergo 40% mechanical keyboard with all components on the top with diodes arranged in an array
- Size
- 323.9 × 95.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 110
- Nets
- 86
- Pads
- 403
- Tracks, vias
- 841, 20
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20200119)
- Created
- 3 Jun 2020
- Updated
- 17 Nov 2020
Overview
UnSplit is an open-source printed circuit board by swiftrax, from the swiftrax/UnSplit repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 323.9 × 95.1 mm with 110 parts on 86 nets, routed with 841 tracks and 20 vias.
It is built around the ATMEGA32U4-AU. Its parts include 44 diodes, 6 resistors, 5 capacitors, 1 IC and 1 connector. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdUnSplit
A Kyria layout with some of the thumb keys removed. It is non split and powered by an ATMega32u4-AU. Featuring an exposed component layout with diodes in a bank.
PCB Renders
Top Full Ground Plane
Bottom Full Ground Plane
Top Partial Ground Plane
Bottom Partial Ground Plane
Open with KiCad nightly
Bill of Materials
- ATMega32u4-AU x 1
- 16MHz Resonator x 1
- 22 Ohm Resistor x 2
- 5.1k Ohm Resistor x 2
- 10k Ohm Resistor x 2
- 100nF Capactior x 3
- 1uF Capactior x 1
- 10uF Capactior x 1
- 500mA Polyfuse x 1
- Reset Switch x 1
- Type C Port x 1
- Diodes x 44
Capactiors and Resistors are 0805 Package size
License
This repository is under the GNU GPL V2 license. If you plan to sell these pcbs, make sure to read it.
Parts
110| Qty | Value | Footprint | References |
|---|---|---|---|
| 44 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +28 |
| 3 | 0.1uF | Capacitor_SMD:C_0805_2012Metric | C2, C3, C4 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R6 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric | R4, R5 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric | R2, R3 |
| 2 | ESC | MX_Only:MXOnly-1U-NoLED | K_1, K_40 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C5 |
| 1 | 16MHz | Local_Project:Resonator_SMD_muRata_CSTxExxV-3Pin_3.0x1.1mm_HandSoldering_Compact | Y1 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | A | MX_Only:MXOnly-1U-NoLED | K_14 |
| 1 | ATmega32U4-AU | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | Alt | MX_Only:MXOnly-1U-NoLED | K_44 |
| 1 | B | MX_Only:MXOnly-1U-NoLED | K_30 |
| 1 | Backspace | MX_Only:MXOnly-1U-NoLED | K_43 |
| 1 | C | MX_Only:MXOnly-1U-NoLED | K_28 |
| 1 | Colon | MX_Only:MXOnly-1U-NoLED | K_23 |
| 1 | Comma | MX_Only:MXOnly-1U-NoLED | K_34 |
| 1 | D | MX_Only:MXOnly-1U-NoLED | K_16 |
| 1 | Del | MX_Only:MXOnly-1U-NoLED | K_38 |
| 1 | Dot | MX_Only:MXOnly-1U-NoLED | K_33 |
| 1 | E | MX_Only:MXOnly-1U-NoLED | K_4 |
| 1 | Enter | MX_Only:MXOnly-1U-NoLED | K_41 |
| 1 | F | MX_Only:MXOnly-1U-NoLED | K_17 |
| 1 | FN | MX_Only:MXOnly-1U-NoLED | K_39 |
| 1 | G | MX_Only:MXOnly-1U-NoLED | K_18 |
| 1 | H | MX_Only:MXOnly-1U-NoLED | K_19 |
| 1 | I | MX_Only:MXOnly-1U-NoLED | K_9 |
| 1 | J | MX_Only:MXOnly-1U-NoLED | K_20 |
| 1 | K | MX_Only:MXOnly-1U-NoLED | K_21 |
| 1 | L | MX_Only:MXOnly-1U-NoLED | K_22 |
| 1 | LOGO | Local_Project:Lemur70mm | G*** |
| 1 | M | MX_Only:MXOnly-1U-NoLED | K_32 |
| 1 | Minus | MX_Only:MXOnly-1U-NoLED | K_36 |
| 1 | N | MX_Only:MXOnly-1U-NoLED | K_31 |
| 1 | O | MX_Only:MXOnly-1U-NoLED | K_10 |
| 1 | P | MX_Only:MXOnly-1U-NoLED | K_11 |
| 1 | Pipe | MX_Only:MXOnly-1U-NoLED | K_12 |
| 1 | Q | MX_Only:MXOnly-1U-NoLED | K_2 |
| 1 | Question | MX_Only:MXOnly-1U-NoLED | K_35 |
| 1 | Quote | MX_Only:MXOnly-1U-NoLED | K_24 |
| 1 | R | MX_Only:MXOnly-1U-NoLED | K_5 |
| 1 | Reset | Local_Project:SKQG-1155865 | SW1 |
| 1 | S | MX_Only:MXOnly-1U-NoLED | K_15 |
| 1 | Shift | MX_Only:MXOnly-1U-NoLED | K_25 |
| 1 | Space | MX_Only:MXOnly-1U-NoLED | K_42 |
| 1 | T | MX_Only:MXOnly-1U-NoLED | K_6 |
| 1 | Tab | MX_Only:MXOnly-1U-NoLED | K_13 |
| 1 | U | MX_Only:MXOnly-1U-NoLED | K_8 |
| 1 | USB2_C_Receptacle | Local_Project:Mid_Mount-USB_C_HandSoldering | J1 |
| 1 | V | MX_Only:MXOnly-1U-NoLED | K_29 |
| 1 | W | MX_Only:MXOnly-1U-NoLED | K_3 |
| 1 | Win | MX_Only:MXOnly-1U-NoLED | K_37 |
| 1 | X | MX_Only:MXOnly-1U-NoLED | K_27 |
| 1 | Y | MX_Only:MXOnly-1U-NoLED | K_7 |
| 1 | Z | MX_Only:MXOnly-1U-NoLED | K_26 |
The 105 most common of 110 parts.
Questions
How big is the UnSplit PCB?
It measures 323.9 × 95.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the UnSplit use?
110 parts, built around the ATMEGA32U4-AU. 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 UnSplit KiCad files?
From the swiftrax/UnSplit repository on GitHub, at the commit this page was made from: the board is Hardware/MCUGNDPlane/UnSplit.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the UnSplit design in my own project?
Its repository publishes it under the GPL-2.0 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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