HardLabs

TG4x4

MythosMann·tg4x·KiCad/TG4x4/TG4x4.kicad_pcb

TG4x4 PCB layout, top view — open source AVR/Arduino board by MythosMann

About the TG4x4 PCB

TG4x4 is an open source AVR/Arduino PCB design by MythosMann, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 71.5 × 71.5 mm, with 35 components from 5 distinct parts.

Its main chip is the ProMicro, from the AVR/Arduino family. By type, the board carries 18 switches, 16 diodes and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

A cheap, open source 45% keyboard

*Multiple supported layouts, including split spacebar.

*Driven by pro micro, easily programmable and cheap.

*Uses standard sized keycaps that you could find in any set.

*RGB underglow, used for layer indication and caps lock.

TG4x4, from the project README
From the project README

Main components on the TG4x4

ProMicro

TG4x4 bill of materials (BOM)

35 components, 5 distinct parts.

QtyPartRefs
1
ProMicro
U1
16
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +8
1
SW_Push
SW13
1
SW_Push
SW14
16
D
D1, D2, D3, D4, D5, D6, D7, D8 +8

TG4x4 design files

The KiCad project lives in the MythosMann/tg4x repository on GitHub; these links point at the commit this page was built from.

TG4x4: common questions

What microcontroller does the TG4x4 use?

The TG4x4 is built around the ProMicro, from the AVR/Arduino family.

How big is the TG4x4 PCB?

The TG4x4 measures 71.5 × 71.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TG4x4?

35 components, from 5 distinct parts. The full bill of materials is listed on this page.

Where can I download the TG4x4 design files?

From the MythosMann/tg4x repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the TG4x4 design in my own project?

Yes, under the terms of its GPL-3.0 license, which MythosMann chose for the repository.

Can I test firmware for the TG4x4 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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