Components

	TCA9555PWR Texas Instruments	x 8
	FRC0603J103 TS FOJAN	x 2
	CGA0603X5R105K160JT HRE	x 8
	2541FV-2x8P HanElectricity(瀚源)	x 8

Description

8x TCA9555 SHIELD (+128 pins for Arduino)

This pcb it's made for people who need tons of pins. In fact this shield adds 128 pins to your Arduino. It works using I2C and you can then communicate with the 8 TCA9555. The pullup resistors for the I2C lines are already included in the PCB so you don't have to use external ones

Code

TCA9555 Arduino library by RobTillaar

https://github.com/RobTillaart/TCA9555

Download Gerbers Download BOM(Bill of materials)

Jun 25,2025

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8x TCA9555 SHIELD (+128 pins for Arduino)

This shield adds 128 pins to your Arduino via I2C using 8x TCA9555

464

Published: Jun 25,2025

Standard PCB

Download Gerber file 12

BOM(Bill of materials)

Centroid file

PCBWay Donate 10% cost To Author

Only PCB

PCB+Assembly

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Project images are for reference only. Actual production is based on the manufacturing files on the project page. Please review the designer's notes (e.g., PCB thickness) and select the appropriate options. PCBWay is not responsible for issues caused by unsuitable parameter selections.
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