Software built into the cameras on iPhones and Android phones makes quick work of decoding QR codes. How do you do that on a laptop or desktop computer? I have a friend who calls me occasionally to ...

QR (Quick Response) codes are everywhere these days. You'll spot them on restaurant menus, business cards, product packages, and even concert tickets. A big reason they've caught on is convenience.

Adding a camera to a project used to be a chore, but modern camera modules make it simple. But what if you want to read QR codes? [James Bowman] noticed a $7 module that claims to read QR codes so he ...