Arduino simplifies things by only using just one coding language. Here's what you need to get started with developing software for the tiny device.

Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I document my learning in order to be able to inspire other people to make ...

Most smartphones use capacitive or ultrasonic fingerprint sensors for authentication. The technologies are a little different, but both work well.