

Splitboard B
ECE477 Team 4 Website
- Size
- 185 × 160.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 133
- Nets
- 102
- Pads
- 688
- Tracks, vias
- 832, 83
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 30 Aug 2022
- Updated
- 6 Dec 2022
Overview
Splitboard B is an open-source printed circuit board by zobelj, from the zobelj/ECE477 repository on GitHub. It is a 2-layer board of 185 × 160.2 mm with 133 parts on 102 nets, routed with 832 tracks and 83 vias.
It is built around the AMS1117-3.3. Its parts include 39 diodes, 39 switches, 36 resistors, 9 capacitors and 3 ICs.
Main components
1README
README.mdSplit USB Keyboard
ECE477 Team 4 github
Reset source code to work as keyboard
- Make changes to .ioc file and save it
- Build the code
- Delete the Middlewares folder
- Unzip Middlewares KEYBOARD SETUP.zip and rename the folder to Middlewares (Keep the ziped file here for future use)
- Build the code (there will likely be errors, if so proceed to step 6)
- Navigate to Drivers>STM32F4xx_HAL_DRIVER>Src in this directory there will be duplicate files that look like this
...cortex.cand...cortext 2.cor...cortex 3.cto fix this delete all of the files that have a number at the end of the file name. This can easily be done in the console/terminal withrm *2.corrm *3.c
Parts
133| Qty | Value | Footprint | References |
|---|---|---|---|
| 38 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +22 |
| 38 | KEYSW | 6:SW_Hotswap_Kailh_MX_plated | K1, K2, K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K20, K21, K22, K23 +22 |
| 23 | 20 | Resistor_SMD:R_0805_2012Metric | R10, R11, R12, R13, R14, R15, R16, R17, R24, R25, R26, R27, R28, R29, R30, R31 +7 |
| 11 | 10k | Resistor_SMD:R_0805_2012Metric | R3, R4, R5, R6, R7, R18, R19, R20, R21, R22, R23 |
| 4 | 100nF | Capacitor_SMD:C_0805_2012Metric | C1, C4, C5, C9 |
| 4 | MountingHole | MountingHole:MountingHole_2.7mm | H1, H2, H3, H4 |
| 2 | .01uF | Capacitor_SMD:C_0805_2012Metric | C2, C3 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C6, C7 |
| 2 | 4K7 | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 1 | 100 @ 100 MHz | Resistor_SMD:R_0805_2012Metric | FB1 |
| 1 | 10uf | Capacitor_SMD:C_0805_2012Metric | C8 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | CR2013-MI2120 | Display:CR2013-MI2120 | U1 |
| 1 | Conn_01x09 | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Horizontal | J2 |
| 1 | D_Schottky | Diode_SMD:D_SOD-323 | D39 |
| 1 | MCP23017_SP | Package_DIP:DIP-28_W7.62mm | U2 |
| 1 | RotaryEncoder | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_Amphenol_12401548E4-2A | J1 |
Questions
How big is the Splitboard B PCB?
It measures 185 × 160.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Splitboard B use?
133 parts, built around the AMS1117-3.3. 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 Splitboard B KiCad files?
From the zobelj/ECE477 repository on GitHub, at the commit this page was made from: the board is Splitboard-B/Splitboard-B.kicad_pcb and its schematic ESD Protection Circuit/ESD Protection Circuit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Splitboard B design in my own project?
Its repository states no licence, so its author keeps all rights: ask zobelj before reusing the design.
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