2 layers126.1 × 40.7 mm PIQuest controller, the printed circuit board in 3D

PIQuest controller

Size: 126.1 × 40.7 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 20
Nets: 28
Pads: 82
Tracks, vias: 85, 10
Routed: Yes
KiCad: KiCad 9.0 (file 20241229)
Created: 16 May 2025
Updated: 28 May 2025

Overview

PIQuest controller is an open-source printed circuit board by qwel-exe, from the qwel-exe/PiQuest repository on GitHub. It is a 2-layer board of 126.1 × 40.7 mm with 20 parts on 28 nets, routed with 85 tracks and 10 vias.

It is built around the PCF8574AP. Its parts include 10 switches and 2 ICs.

Main components

PCF8574AP
DIP-16-40℃~+85℃ 100kHz 10uA 2.5V~6V 25mA 300uA 8 8 Cascade and address expansion、Built-in LED driver I2C Interrupt Output Quasi-bidirectional output DIP-16 I/O Expanders ROHSHGSEMII/O Expanders

Project files

Show this board on your page

https://pcbkit.io/boards/qwel-exe/PiQuest/Controllers/PIQuest-controller/PIQuest-controller.kicad_pcb

The board's own page, for a message or a post.

Source

Repository: qwel-exe/PiQuest
Board file: Controllers/PIQuest-controller/PIQuest-controller.kicad_pcb
Commit: 0d38ec2
Licence: Not stated

Parts

Qty	Value	Footprint	References
10	SW_Omron_B3FS	Button_Switch_SMD:SW_SPST_PTS645	SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10
4			, , ,
4		clipboard:eac1f8df-d827-4223-9be8-27f4f49039b8	, , ,
1	PCF8574AP	Package_DIP:DIP-16_W7.62mm	U2
1	WEMOS_C3_mini	RF_Module:WEMOS_C3_mini	U1

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Questions

How big is the PIQuest controller PCB?

It measures 126.1 × 40.7 mm and has 2 copper layers, 1.6 mm thick.

What parts does the PIQuest controller use?

20 parts, built around the PCF8574AP. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the PIQuest controller KiCad files?

From the qwel-exe/PiQuest repository on GitHub, at the commit this page was made from: the board is Controllers/PIQuest-controller/PIQuest-controller.kicad_pcb and its schematic Controllers/PIQuest-controller/PIQuest-controller.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the PIQuest controller design in my own project?

Its repository states no licence, so its author keeps all rights: ask qwel-exe before reusing the design.