4 layers55.5 × 65 mm
Jitx design
gusmanb/logicanalyzer
24 channel, 100Msps logic analyzer hardware and software
30 parts5.1kGPL-3.0
4 layers
A kvm that can switch one output USB C between two input USB C connections.
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 30
- Nets
- 59
- Pads
- 278
- Tracks, vias
- 331, 26
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 31 May 2021
- Updated
- 11 Oct 2021
Overview
Kvm is an open-source printed circuit board by OleStrohm, from the OleStrohm/USB-C-kvm repository on GitHub, published under the MIT licence. It is a 4-layer board with 30 parts on 59 nets, routed with 331 tracks and 26 vias.
It is built around the HD3SS3212RKS. Its parts include 10 resistors, 7 ICs, 6 capacitors, 4 connectors and 1 switch. It belongs with the STM32 boards of this library.
Main components
1README
README.mdUSB C kvm
A USB C kvm used to switch one output connection between two input connections.
This allows one to connect a peripheral to the output and a computer to each input, and then switch which computer it should be connected to with the press of a button.
Goals
These are the design goals I'm aiming for:
- Full speed USB C including PD.
- Cheap and robust implementation
- SMD, but solderable by hand.
Parts
30| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k | Resistor_SMD:R_0805_2012Metric | R3, R4, R5, R7, R9, R10 |
| 3 | HD3SS3212 | VQFN20:VQFN20RKS | U2, U3, U4 |
| 3 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_Amphenol_12401548E4-2A | J1, J3, J4 |
| 2 | 1u | Capacitor_SMD:C_0805_2012Metric | C1, C3 |
| 2 | 30p | Capacitor_SMD:C_0805_2012Metric | C5, C6 |
| 2 | 640 | Resistor_SMD:R_0805_2012Metric | R6, R8 |
| 2 | UCS3205 | VQFN20:VQFN19_3x3x0.9mm | U6, U7 |
| 1 | 10u | Capacitor_SMD:C_1206_3216Metric | C4 |
| 1 | 3.32M | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 3300p | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 33u | Inductor_SMD:L_0805_2012Metric | L1 |
| 1 | 866k | Resistor_SMD:R_0805_2012Metric | R2 |
| 1 | Conn_ARM_JTAG_SWD_10 | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD | J2 |
| 1 | Crystal | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | MAX17501AxTB | Package_DFN_QFN:TDFN-10-1EP_2x3mm_P0.5mm_EP0.9x2mm | U1 |
| 1 | STM32F030F4Px | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U5 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_B3S-1000 | SW1 |
Questions
What parts does the Kvm use?
30 parts, built around the HD3SS3212RKS. 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 Kvm KiCad files?
From the OleStrohm/USB-C-kvm repository on GitHub, at the commit this page was made from: the board is kvm.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kvm 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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