HardLabs

Catfinder

hariskadayan·catfinder·pcb/catfinder.kicad_pcb

Catfinder PCB layout, top view — open source RP2040/RP2350 board by hariskadayan

About the Catfinder PCB

Catfinder is an open source RP2040/RP2350 PCB design by hariskadayan, published on GitHub. It is a 2-layer board measuring 99.7 × 34.9 mm, with 13 components from 4 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 4 switches, 4 diodes, 4 resistors and 1 IC.

It belongs with the keyboards designs in this gallery.

From the project

A cat-themed PCB fidget toy with four Cherry MX switches and four LED lights powered by a Seeed Studio XIAO RP2040. It has a Simon Says and a button lights up LED mode. Created for the Hack Club Stasis program.

catfinder - A cat-themed PCB fidget toy with four Cherry MX switches and four LED lights powered by a Seeed Studio XIAO RP2040. It has a Simon Says and a button lights up LED mode. Created for the Hack Club Stasis program.

3D Render - This is the 3D render in KiCad with all of the components:

Schematic - This is the schematic, which shows all of the connections. This took the least amount of time to make, and to improve organization I used labels:

Catfinder, from the project README
From the project README

Main components on the Catfinder

XIAO-RP2040-DIP

Catfinder bill of materials (BOM)

13 components, 4 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
XIAO-RP2040-DIP
U1
4
SW_Push
SW1, SW2, SW3, SW4
4
LED
D1, D2, D3, D4
4
R
R1, R2, R3, R4

Catfinder design files

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

Catfinder: common questions

What microcontroller does the Catfinder use?

The Catfinder is built around the XIAO-RP2040-DIP, from the RP2040/RP2350 family.

How big is the Catfinder PCB?

The Catfinder measures 99.7 × 34.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Catfinder?

13 components, from 4 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 Catfinder design files?

From the hariskadayan/catfinder 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 Catfinder design in my own project?

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

Can I test firmware for the Catfinder 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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