SparkFun will be closed May 25, 2015 for Memorial Day. Orders placed after 2pm on Friday the 22nd will ship out on Tuesday. Thanks!
We’ve been meaning to write this interfacing tutorial for many years now. It’s a simple breakdown of the various ways to interface 3.3V logic devices to 5V logic devices. It’s not too tricky! We hope it helps you avoid burning out your lower voltage sensors and devices.