HardLabs

TG4xhotswap

IndianBoy42·keyboard-pcbs·boardsource_tg4x/KiCad/TG4xhotswap.kicad_pcb

TG4xhotswap PCB layout, top view — open source AVR/Arduino board by IndianBoy42

About the TG4xhotswap PCB

TG4xhotswap is an open source AVR/Arduino PCB design by IndianBoy42, published on GitHub. It is a 2-layer board measuring 244.8 × 72.8 mm, with 93 components from 7 distinct parts.

Its main chip is the ATMEGA32U2-AU, from the AVR/Arduino family. By type, the board carries 46 diodes, 31 switches, 7 LEDs, 1 IC and 1 connector.

It belongs with the keyboards designs in this gallery.

From the project

Files for my keyboard PCBs, derived or original

*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.

TG4xhotswap, from the project README
From the project README

Main components on the TG4xhotswap

ATMEGA32U2-AU

TG4xhotswap bill of materials (BOM)

93 components, 7 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U2-AU
ProMicro
U1
1
Conn_01x04_Female
J1
7
SW_Push
100u, 125u, 150u, 175u, 200u, 225u, 275u
1
SW_Push
SW0
30
SW_Push
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +22
7
WS2812B
LED1, LED2, LED3, LED4, LED5, LED6, LED7
46
SOD-123
1N4148
D1, D2, D3, D4, D5, D6, D7, D8 +38

TG4xhotswap design files

The KiCad project lives in the IndianBoy42/keyboard-pcbs repository on GitHub; these links point at the commit this page was built from.

TG4xhotswap: common questions

What microcontroller does the TG4xhotswap use?

The TG4xhotswap is built around the ATMEGA32U2-AU, from the AVR/Arduino family.

How big is the TG4xhotswap PCB?

The TG4xhotswap measures 244.8 × 72.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TG4xhotswap?

93 components, from 7 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 TG4xhotswap design files?

From the IndianBoy42/keyboard-pcbs repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the TG4xhotswap design in my own project?

The repository has no license, so all rights stay with IndianBoy42. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the TG4xhotswap 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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