HardLabs

SoundRat

MrDiamondDog·SoundRat·pcb/SoundRat.kicad_pcb

SoundRat PCB layout, top view — open source RP2040/RP2350 board by MrDiamondDog

About the SoundRat PCB

SoundRat is an open source RP2040/RP2350 PCB design by MrDiamondDog, published on GitHub. It is a 2-layer board measuring 100 × 37.5 mm, with 25 components from 3 distinct parts.

Its main chip is the RP2040-ZERO, from the RP2040/RP2350 family. By type, the board carries 19 diodes, 5 switches and 1 IC.

It belongs with the displays & leds designs in this gallery.

From the project

A desktop sound mixer for controlling the volumes of applications on your computer. This repo contains CAD, PCB, firmware, and software.

A desktop sound mixer for controlling the volumes of applications on your computer. This repo contains CAD, PCB, firmware, and software.

Includes 5 rotary encoders (with buttons!), 16 RGB LEDs, and an RP2040-zero microcontroller, all on a custom PCB in a custom case!

The software runs on your computer and reads from SoundRat to update application volumes, the firmware simply sends that data over and receives volume/peak data.

SoundRat, from the project README
From the project README

Main components on the SoundRat

RP2040-ZERO

SoundRat bill of materials (BOM)

25 components, 3 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2040-ZERO
U1
5
RotaryEncoder_Switch
SW1, SW2, SW3, SW4, SW5
19
SK6812
D1, D2, D3, D4, D5, D6, D7, D8 +11

SoundRat design files

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

SoundRat: common questions

What microcontroller does the SoundRat use?

The SoundRat is built around the RP2040-ZERO, from the RP2040/RP2350 family.

How big is the SoundRat PCB?

The SoundRat measures 100 × 37.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SoundRat?

25 components, from 3 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 SoundRat design files?

From the MrDiamondDog/SoundRat 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 SoundRat design in my own project?

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

Can I test firmware for the SoundRat without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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