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Pin check expansion

htpkbs·pin-check·pcb-expansion/pin-check-expansion.kicad_pcb

Pin check expansion PCB layout, top view — open source board by htpkbs

About the Pin check expansion PCB

Pin check expansion is an open source PCB design by htpkbs, published on GitHub under the BSD-2-Clause license. It is a 2-layer board measuring 38.1 × 53.3 mm, with 6 components from 4 distinct parts.

Other key parts include the MCP23017_SP. By type, the board carries 2 switches, 2 diodes, 1 IC and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

A small PCB for hand-wired keyboards that uses all through-hole components.

Overview DIY PCB Components Bootloader Acrylic Window Building the Kit Designing a Keyboard QMK Acknowledgments and Sublicenses

The pin-check is a printed circuit board (PCB) for hand-wired keyboards that uses all through-hole components, and supports QMK firmware, MX or Alps keyswitches, and split layouts. The keyswitch spacing is 19.05 mm and the USB connector is USB-C.

Pin check expansion, from the project README
From the project README

Main components on the Pin check expansion

MCP23017_SP

Pin check expansion bill of materials (BOM)

6 components, 4 distinct parts.

QtyPartRefs
1
MCP23017_SP
U1
1
Conn_01x04
J1
2
MX-NoLED
SW1, SW2
2
1N4148
D1, D2

Pin check expansion design files

The KiCad project lives in the htpkbs/pin-check repository on GitHub; these links point at the commit this page was built from.

Pin check expansion: common questions

How big is the Pin check expansion PCB?

The Pin check expansion measures 38.1 × 53.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pin check expansion?

6 components, from 4 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pin check expansion design files?

From the htpkbs/pin-check repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Pin check expansion design in my own project?

Yes, under the terms of its BSD-2-Clause license, which htpkbs chose for the repository.

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