HardLabs

TG4x

MythosMann·tg4x·KiCad/TG4x.kicad_pcb

TG4x PCB layout, top view — open source AVR/Arduino board by MythosMann

About the TG4x PCB

TG4x 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 243 × 72.7 mm, with 105 components from 13 distinct parts.

Its main chip is the ProMicro, from the AVR/Arduino family. By type, the board carries 46 diodes, 41 switches, 7 LEDs, 1 IC and 1 connector.

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.

TG4x, from the project README
From the project README

Main components on the TG4x

ProMicro

TG4x bill of materials (BOM)

105 components, 13 distinct parts.

QtyPartRefs
1
ProMicro
U1
1
Conn_01x04_Female
J1
3
SW_Push
100u, 125u, 600u
1
SW_Push
150u
1
SW_Push
175u
1
SW_Push
200u
1
SW_Push
225u
1
SW_Push
275u
1
SW_Push
625u
1
SW_Push
SW0
40
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +32
7
WS2812B
LED1, LED2, LED3, LED4, LED5, LED6, LED7
46
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +38

TG4x design files

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

TG4x: common questions

What microcontroller does the TG4x use?

The TG4x is built around the ProMicro, from the AVR/Arduino family.

How big is the TG4x PCB?

The TG4x measures 243 × 72.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TG4x?

105 components, from 13 distinct parts. The full bill of materials is listed on this page.

Where can I download the TG4x 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 TG4x 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 TG4x 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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