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Tip: Quickly Switch Between Front & Rear Cameras on Your Galaxy S8

It's never fun to fidget around with your phone's camera while you're out and about, especially when it comes to transitioning between its front- and rear-facing cameras. Thankfully, Galaxy S8 users can scratch this one off their list of inconveniences, as Samsung has built in some nifty features that let you switch from the main shooter to the selfie cam without having to look at the screen or tap on the camera switch icon.

How To: Ditch Your Doorbell for This Front Door RFID Lock That Lets Whoever You Want In (Whenever You Want)

Hate answering the door, but don't trust your friends with a set of keys? This RFID front door lock made by Steve Pomeroy will solve all your party-hosting problems. It reads the RFID tags in his friends' public transit cards and decides who's allowed in based on "groups" that Steve defines. And I have to say, it's also rather stylish. It's controlled by an Arduino serial console and a custom Android app to add and remove cards. The reader can store 50 or 100 tags at a time and allows 7 diffe...

How To: Unlock Your Front Door Without Keys Using This DIY Keyfob Entry System

Keys are on the way out. They're clunky, take up precious space, and slow you down when you have tons of identical-looking gold ones on your keyring. Everything we can open with keys can now also be opened with wireless technology in just a click—so why use keys anymore? Sure, you can pay hundreds of dollars for an automated lock system on your house—but why do that when you can build it yourself!

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