HardLabs

Kvm pad

carbncl·kvm-pad·hardware/0.1/kvm-pad.kicad_pcb

Kvm pad PCB layout, top view — open source AVR/Arduino board by carbncl

About the Kvm pad PCB

Kvm pad is an open source AVR/Arduino PCB design by carbncl, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 3.7 × 3.7 mm, with 91 components from 29 distinct parts.

Its main chip is the ATMEGA32U4, from the AVR/Arduino family. Other key parts include the USBLC6-2SC6, TPS211x, TS3USB30 and CY7C65632-28LTXCT. By type, the board carries 22 diodes, 22 capacitors, 18 resistors, 8 relays, 6 ICs and 6 connectors.

It belongs with the keyboards and usb & debug tools designs in this gallery.

From the project

Macropad with Inbuilt USB Hub and KVM Switch

* generates zipped gerbers, BOM, and iBOM PnP file

NAME is the file name of project and is required, no spaces allowed VERSION is optional and defaults to 0.1, must be unique DESIGNER is optional and defaults to Josh Johnson`

* requires python3 and a small number of dependencies

utilises custom BOM format found in scripts/joshbom.py requires dependancy to be installed to global scope pip3 install kicadnetlistreader`

Main components on the Kvm pad

USBLC6-2SC6ATMEGA32U4TPS211xTS3USB30CY7C65632-28LTXCT

Kvm pad bill of materials (BOM)

91 components, 29 distinct parts.

QtyPartRefs
2
USBLC6-2SC6
U1, U3
1
ATMEGA32U4
U2
1
TPS211x
U4
1
TS3USB30
U5
1
CY7C65632-28LTXCT
U6
1
12MHz
Y2
2
USB_C_Receptacle_USB2.0
J1, J2
1
AVR-ISP-6
J3
3
USB_A
J4, J5, J6
2
500mA
F1, F2
8
KEYSW
K1, K2, K3, K4, K5, K6, K7, K8
8
D
D1, D2, D3, D4, D5, D6, D7, D8
1
STAT
D9
1
PWR
D10
12
WS2812B
D11, D12, D13, D14, D15, D16, D17, D18 +4
6
600R
FB1, FB2, FB3, FB4, FB5, FB6
6
1u
C1, C6, C10, C17, C18, C20
10
100n
C2, C3, C7, C8, C11, C14, C15, C16 +2
4
22p
C4, C5, C12, C13
2
10u
C9, C22
Show 9 more
QtyPartRefs
2
22R
R1, R2
6
10K
R3, R8, R10, R11, R12, R13
2
2K2
R4, R5
1
DNP
R6
1
0R
R7
1
R_LIM
R9
2
100K
R14, R16
1
649R
R15
2
5K1
RN1, RN2

Kvm pad design files

The KiCad project lives in the carbncl/kvm-pad repository on GitHub; these links point at the commit this page was built from.

Kvm pad: common questions

What microcontroller does the Kvm pad use?

The Kvm pad is built around the ATMEGA32U4, from the AVR/Arduino family.

How big is the Kvm pad PCB?

The Kvm pad measures 3.7 × 3.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Kvm pad?

91 components, from 29 distinct parts. The full bill of materials is listed on this page.

Where can I download the Kvm pad design files?

From the carbncl/kvm-pad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Kvm pad design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which carbncl chose for the repository.

Can I test firmware for the Kvm pad without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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