Some Arduino boards feature the I2C pins in different places, and you can check out the full hardware requirements for all Arduino boards on the Wire Library Reference page.

[Johngineer] found himself in need of an I2C sniffer, but didn’t have one available. Necessity is the mother of invention, so he put together this I2C sniffer sketch for Arduino. The arduino … ...

PJON, pronounced like the iridescent sky rats found in every city, is a cool one wire protocol designed by [gioblu]. [gioblu] wasn’t impressed with the complications of I2C. He thought one-wi… ...

Step-by-step guide on designing and programming a custom I2C slave sensor device using Arduino. Who Won and Lost in Trump’s Tax Bill Scientists tracking ‘interstellar’ object that has come ...

YouTube channel How To Mechatronics has created a great tutorial with full instructions on how to create your very own Arduino powered 3D wire bending machine.

Well tech tinkerer Joe Desbonnet has whipped up what he dubs "poor man's NFC" using an Arduino, some magnet wire, and any compass-equipped Android smartphone (which is almost all of them).