All around the US yesterday the Google Nexus 7 started hitting doorsteps. As is customary with any gadget, it doesn’t take long for those of us with the exploration bug to know their device from top to bottom within hours. In the past we’ve seen amazing things, from hacked on inductive chargers to 128GB SD cards wired into the device for added storage. The Nexus 7 is a sealed device, so it’s going to take a little while longer for any truly clever hardware mods to exist. That hasn’t stopped an eager few from figuring out what it would take to create a smart cover for their device. In fact, it’s been done for less than $10.A smart cover allows the device to wake when you lift the lid on the case, as seen on the last two iPads. As soon as you open the cover, the screen turns on as though you hit the power button, waiting for your instructions. If you’ve removed the lockscreen from the Nexus 7, you could be taken right to whatever it is you were doing last on the tablet. Since the Nexus 7 is brand new, and there’s yet to be an incredibly successful Android tablet, there are no real accessories to speak of — official or third party. If you want a case, for the time being you’ll have to look at cases that have technically been made for other devices.There’s a generic enough case for the Kindle Fire called the YooMee. The only thing special about this tablet case is that it’s available on Amazon Prime for $6. If you’re the impatient sort, you could have it shipped overnight and still be right around $10 for the case. The tablet case fits the Nexus 7, leaving all ports and buttons exposed except for the speaker in the back. As an added bonus the case has a hand strap, allowing the tablet to just hang on your hand while you read. The case has one more feature, accidental though it may be. The hand strap is in the perfect place for you to insert a magnet.All it takes to make this happen is to glue a magnet of your choosing into the hand strap, and when you close the case the screen on the Nexus 7 will turn off. Choosing your magnet is important in this step, if you choose a magnet that is too weak the tablet won’t respond. Additionally, if the magnet is too strong, the screen will turn itself back off when you fold the cover on itself. I found that most fridge magnets do the trick pretty well. Glue your magnet into place, and you’ve got yourself a smart cover!Thanks to Aaron Kasten for the tip and video.