CoolPad

dzhashmi·CoolPad·PCB/mycoolpad.kicad_pcb

About the CoolPad PCB

CoolPad is an open source RP2040/RP2350 PCB design by dzhashmi, published on GitHub under the MIT license. It is a 2-layer board measuring 67.3 × 91.1 mm, with 30 components from 6 distinct parts.

Its main chip is the XIAO-RP2040-DIP, from the RP2040/RP2350 family. By type, the board carries 18 diodes, 10 switches, 1 IC and 1 connector.

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

From the project

This is my first public project involving Electronics.

Please provide feedback or even ideas on how this can be improved!

This project was built from scratch. With guidance from online sources, the guide found on the project page of Hackclub Blueprint, and AI.

Rotary Control: EC11 Rotary Encoder for volume.

RGB Underglow: 9x SK6812 MINI LEDs (one with every key).

The case that I spent way too long trying to make look decent.

CoolPad, from the project README — From the project README

Main components on the CoolPad

XIAO-RP2040-DIP

CoolPad bill of materials (BOM)

30 components, 6 distinct parts.

Qty	Part	Footprint	Refs
1	XIAO-RP2040-DIP	XIAO-RP2040-DIP	U1
1	Conn_01x04	PinHeader_1x04_P2.54mm_Vertical	J1
9	SW_Push	SW_Cherry_MX_1.00u_PCB	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +1
1	RotaryEncoder_Switch	RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm	SW10
9	D_Small	D_DO-35_SOD27_P7.62mm_Horizontal	D1, D2, D3, D4, D5, D6, D7, D8 +1
9	SK6812MINI-E	MX_SK6812MINI-E_REV	D10, D11, D12, D13, D14, D15, D16, D17 +1

CoolPad design files

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

LayoutPCB/mycoolpad.kicad_pcb
SchematicPCB/mycoolpad.kicad_sch

CoolPad: common questions

What microcontroller does the CoolPad use?

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

How big is the CoolPad PCB?

The CoolPad measures 67.3 × 91.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CoolPad?

30 components, from 6 distinct parts. The full bill of materials is listed on this page.

Where can I download the CoolPad design files?

From the dzhashmi/CoolPad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the CoolPad design in my own project?

Yes, under the terms of its MIT license, which dzhashmi chose for the repository.

Can I test firmware for the CoolPad 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.