HardLabs

Goldfish

staticintlucas·goldfish·cad/goldfish.kicad_pcb

Goldfish PCB layout, top view — open source AVR/Arduino board by staticintlucas
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About the Goldfish PCB

Goldfish is an open source AVR/Arduino PCB design by staticintlucas, published on GitHub. It is a 2-layer board measuring 17.8 × 33 mm, with 26 components from 16 distinct parts.

Its main chip is the ATMEGA32U4-MU, from the AVR/Arduino family. Other key parts include the USBLC6-2P6. By type, the board carries 10 capacitors, 6 resistors, 5 connectors, 2 ICs, 1 crystal and 1 fuse.

It belongs with the keyboards designs in this gallery.

From the project

A small, thin, USB-C, Pro Micro compatible microcontroller

Goldfish is a Pro Micro compatible microcontroller board designed for use in mechanical keyboards. It is based on the same Atmel ATMega32U4 chip and is programmable using the Arduino IDE or a keyboard specific firmware such as TMK or QMK. Of course it is perfectly usable for any other electronics projects too, not just keyboards.

- Lower board profile with the mid-mounted USB-C connector - Two internal pins make the USB data lines easily accessible - USB-C is more durable, reversible and just plain cool - 5 additional pins on the bottom edge of the board - Pin-compatible with the original…

Goldfish, from the project README
From the project README

Main components on the Goldfish

ATMEGA32U4-MUUSBLC6-2P6

Goldfish bill of materials (BOM)

26 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA32U4-MU
ATmega32U4-M
Microchip
U1
1
USBLC6-2P6
ST
U2
1
16MHz
X1
1
2169900001
USB_C_Receptacle_USB2.0
Molex
J1
1
Conn_01x02
J2
2
Conn_01x12
J3, J4
1
Conn_01x05
J5
1
500mA
F1
1
D_Schottky
D1
6
0u1
C1, C2, C3, C4, C5, C10
1
4u7
C6
2
22p
C7, C8
1
1u
C9
2
5k1
R1, R2
2
10k
R3, R6
2
22
R4, R5

Goldfish design files

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

Goldfish: common questions

What microcontroller does the Goldfish use?

The Goldfish is built around the ATMEGA32U4-MU, from the AVR/Arduino family.

How big is the Goldfish PCB?

The Goldfish measures 17.8 × 33 mm, has 2 copper layers and is 1.2 mm thick.

How many components are on the Goldfish?

26 components, from 16 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 Goldfish design files?

From the staticintlucas/goldfish 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 Goldfish design in my own project?

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

Can I test firmware for the Goldfish 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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