HardLabs

GLTKB-Back-40-ProMicro-V1

ellisgl·GLTKB-Back-40-ProMicro-V1

GLTKB-Back-40-ProMicro-V1 PCB layout, top view — open source AVR/Arduino board by ellisgl

About the GLTKB-Back-40-ProMicro-V1 PCB

GLTKB-Back-40-ProMicro-V1 is an open source AVR/Arduino PCB design by ellisgl, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 142.9 × 145.3 mm, with 81 components from 6 distinct parts.

Its main chip is the ProMicro, from the AVR/Arduino family. By type, the board carries 40 diodes, 14 relays, 1 IC and 1 resistor.

It belongs with the keyboards designs in this gallery.

From the project

The other 40% mechanical keyboard

GLTKB-Back-40-ProMicro-V1, from the project README
From the project README

Main components on the GLTKB-Back-40-ProMicro-V1

ProMicro

GLTKB-Back-40-ProMicro-V1 bill of materials (BOM)

81 components, 6 distinct parts.

QtyPartRefs
1
ProMicro
U1
14
KEYSW
K0, K1, K2, K3, K4, K5, K6, K7 +6
25
KEYSW
KDEL1, KDOT1, KDWN1, KEND1, KENT1, KFN1, KFN2, KFN3 +17
1
LED
D1
39
1N4148
D2, D3, D4, D5, D6, D7, D8, D9 +31
1
750
R1

GLTKB-Back-40-ProMicro-V1 design files

The KiCad project lives in the ellisgl/GLTKB-Back-40-ProMicro-V1 repository on GitHub; these links point at the commit this page was built from.

GLTKB-Back-40-ProMicro-V1: common questions

What microcontroller does the GLTKB-Back-40-ProMicro-V1 use?

The GLTKB-Back-40-ProMicro-V1 is built around the ProMicro, from the AVR/Arduino family.

How big is the GLTKB-Back-40-ProMicro-V1 PCB?

The GLTKB-Back-40-ProMicro-V1 measures 142.9 × 145.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the GLTKB-Back-40-ProMicro-V1?

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

Where can I download the GLTKB-Back-40-ProMicro-V1 design files?

From the ellisgl/GLTKB-Back-40-ProMicro-V1 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the GLTKB-Back-40-ProMicro-V1 design in my own project?

Yes, under the terms of its BSD-3-Clause license, which ellisgl chose for the repository.

Can I test firmware for the GLTKB-Back-40-ProMicro-V1 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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