HardLabs

Left thumb

jakobkg·j0xx·pcb/left_thumb/left_thumb.kicad_pcb

Left thumb PCB layout, top view — open source board by jakobkg
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About the Left thumb PCB

Left thumb is an open source PCB design by jakobkg, published on GitHub. It is a 2-layer board measuring 45.7 × 45.7 mm, with 7 components from 4 distinct parts.

By type, the board carries 2 switches, 2 diodes, 2 capacitors and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

Smashbox/Frame1-inspired game controller with support for Cherry MX and Kailh Choc switches

The controller case is designed to be made out of cut sheets of material, such as laser cut wood/acrylic or metal. I recommend a thickness of 3mm for the top plate for use with low profile Choc switches, and 6mm for use with regular MX switches to ensure keycaps protrude nicely without the sides of the switches being exposed. The switch mounting plate needs to be 1.5mm thick to fit the Cherry MX/Kailh Choc design specs and ensure a good fit, thinner plates may cause poor mounting and thicker plates will interfere with Choc switch mounting.

Left thumb, from the project README
From the project README

Left thumb bill of materials (BOM)

7 components, 4 distinct parts.

QtyPartRefs
1
Conn_01x06
J1
2
SW_Push
SW1, SW2
2
WS2812B
D1, D2
2
C
C1, C2

Left thumb design files

The KiCad project lives in the jakobkg/j0xx repository on GitHub; these links point at the commit this page was built from.

Left thumb: common questions

How big is the Left thumb PCB?

The Left thumb measures 45.7 × 45.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Left thumb?

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

Where can I download the Left thumb design files?

From the jakobkg/j0xx repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Left thumb design in my own project?

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

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