ChaosHackpad

chaowoses·ChaosHackpad·PCB/ChaosHackpad.kicad_pcb

About the ChaosHackpad PCB

ChaosHackpad is an open source RP2040/RP2350 PCB design by chaowoses, published on GitHub. It is a 2-layer board measuring 81 × 61.7 mm, with 22 components from 6 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 12 diodes, 8 switches, 1 IC and 1 LED.

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

From the project

Runs CircuitPython with KMK firmware on the Seeed Studio XIAO RP2040 The included firmware file is a temporary firmware used for testing the hardware, and will be changed when I build the board. It provides basic key input, rotary encoder volume control, RGB lighting, and OLED display output.

ChaosHackpad, from the project README — From the project README

Main components on the ChaosHackpad

XIAO-RP2040-DIP

ChaosHackpad bill of materials (BOM)

22 components, 6 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	XIAO-RP2040-DIP	XIAO-RP2040-DIP	U1
1	RotaryEncoder_Switch	RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm	SW1
7	SW_PUSH_45DEG SW_Push_45deg	SW_Cherry_MX_1.00u_PCB	SW2, SW3, SW4, SW5, SW6, SW7, SW8
1	SSD1306	SSD1306-0.91-OLED-4pin-128x32	Brd1
4	SK6812MINI	SK6812MINI-E_fixed	D1, D2, D3, D4
8	1N4148	D_DO-35_SOD27_P7.62mm_Horizontal	D5, D6, D7, D8, D9, D10, D11, D12

ChaosHackpad design files

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

ChaosHackpad: common questions

What microcontroller does the ChaosHackpad use?

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

How big is the ChaosHackpad PCB?

The ChaosHackpad measures 81 × 61.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ChaosHackpad?

22 components, from 6 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 ChaosHackpad design files?

From the chaowoses/ChaosHackpad 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 ChaosHackpad design in my own project?

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

Can I test firmware for the ChaosHackpad 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.