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Calc plate

georgsnarbuts·kalkulators·hardware/switch-plate/calc_plate.kicad_pcb

Calc plate PCB layout, top view — open source board by georgsnarbuts
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About the Calc plate PCB

Calc plate is an open source PCB design by georgsnarbuts, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 76.2 × 95.3 mm, with 3 components from 1 distinct parts.

It belongs with the keyboards designs in this gallery.

From the project

A mechanical-key calculator that also works as a numpad, designed and sold as a kit.

A mechanical-key calculator that also works as a numpad, designed and sold as a kit.

It runs standalone off a single AA cell as an eight-digit calculator. Plug it into USB-C and it enumerates as a keyboard instead, working as a numpad or macropad with every key remappable through VIA. The firmware watches VBUS to decide which of the two it should be.

firmware/ is a QMK keyboard definition, not a standalone project. Drop it into a QMK checkout before building:

Calc plate, from the project README
From the project README

Calc plate bill of materials (BOM)

3 components, 1 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
MountingHole_Pad
H1, H2, H3

Calc plate design files

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

Calc plate: common questions

How big is the Calc plate PCB?

The Calc plate measures 76.2 × 95.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Calc plate?

3 components, from 1 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 Calc plate design files?

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

Can I use the Calc plate design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

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