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How to Build a FPV Racing Quadcopter!

After learning about the world of FPV quadcopter racing, we couldn't wait to build our own. With the help of Lumenier and FPV quadcopter flyer Charpu, we learn about all the components needed to build a solid mini racing quadcopter for under $850, camera and FPV goggle kit included. Charpu helps us assemble the quadcopter and gives useful tips for first-time builders. It's really not that difficult!

Google Play App Roundup: Cram, Hearthstone, and GTA: Chinatown Wars

You phone or tablet might be cool, but it could be a lot cooler with the right apps. So what? Spend like mad until you find the apps that suit your needs? Nah, just read the weekly Google Play App Roundup here on Tested where we work to bring you the best new apps on Android. Just click links to head to the Play Store

This week your pictures shrink, car collecting gets serious, and it's time for theft of the grand auto variety.

Cram

Device makers are constantly increasing the megapixel counts of cameras, but the size of internal storage is still hovering around 16GB. Bigger images take up a lot more space, and not all devices even have removable storage as an option. Enter Cram, which promises to reduce the size of your snapshots by 60% or more without making them look like junk.

A jpeg is already a compressed image file, the quality of which depends on how the compression algorithm used. Cram is simply a way to compress the image further, and it claims that can be done without affecting the overall quality or reducing the resolution.

There are a few ways to use Cram, the safest being manually, one image at a time to start. Simply choose the folder and file you want to shrink, and let the app do its thing. The images themselves are added to a new folder on your device, but the app gives you the option of deleting the old version at the end of the process. There's also a toggle in the settings to have this happen automatically.

As for the quality of the reduced images, you've got three tiers to choose from--quality, balanced, and size. The default mode favors quality, but even then I'm seeing upward of 60% file size reductions. If you crank it up to favor size, the resulting file is even smaller. Try as I might, I can't detect any difference between old and new with the app set to favor quality. Since the resolution is unaffected, you can still crop the photo as needed.

If you're mainly sharing photos from your phone to online services, I think you could get away with decreasing the file size even more. I can tell the difference between the original and compressed image when the settings favor size reduction, but only when cropping and zooming. That's not going to matter so much on Instagram or Facebook.

Cram offers 300 image reductions for free, at which time you can get unlimited use for a single $1.99 in-app purchase. At that point, it's safe to allow the app to process an entire folder of images. Cram is definitely something you should check out if you find yourself struggling to make it work with a 16GB phone.

Print the Mystery Object: Tip of the Hat

Let's finish this week with a mystery object printed from our PrintrBot! You know the drill: place your best guess as to what's being printed in the comments below. This week's build is holiday appropriate!