HardLabs

2key

ahtn·keyboard_pcb·two_key_efm8/2key.kicad_pcb

2key PCB layout, top view — open source Silicon Labs board by ahtn

About the 2key PCB

2key is an open source Silicon Labs PCB design by ahtn, published on GitHub. It is a 2-layer board measuring 36.5 × 17.5 mm, with 7 components from 5 distinct parts.

Its main chip is the MCP73832T-2ACI/OT, from the Silicon Labs family. By type, the board carries 4 capacitors, 1 IC, 1 connector and 1 relay.

It belongs with the keyboards designs in this gallery.

Main components on the 2key

MCP73832T-2ACI/OT

2key bill of materials (BOM)

7 components, 5 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP73832T-2ACI/OT
EFM8UB2_32
U1
1
670-2849-1
USB_OTG
J1
1
SW_PUSH
K1_1
2
4.7UF
C
C1, C2
2
1UF
C
C3, C4

2key design files

The KiCad project lives in the ahtn/keyboard_pcb repository on GitHub; these links point at the commit this page was built from.

2key: common questions

What microcontroller does the 2key use?

The 2key is built around the MCP73832T-2ACI/OT, from the Silicon Labs family.

How big is the 2key PCB?

The 2key measures 36.5 × 17.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 2key?

7 components, from 5 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the 2key design files?

From the ahtn/keyboard_pcb repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the 2key design in my own project?

The repository has no license, so all rights stay with ahtn. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the 2key without the hardware?

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

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