Binary and hexadecimal are a bit baffling at a glance. The idea that a computer uses numbers and letters as representations of other numbers isn’t exactly the easiest idea to wrap your head around, but Adafruit’s Collin does his best to explain it.

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Vaping’s wild west days are nearly over. Soon, e-cigarettes will be illegal for minors to buy, and ingredients will have to pass FDA approval. The new rules take effect in August, and also apply to hookah and cigars.

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For times when a drill is too large, or just plain overkill, this $21 electric screwdriver earns its keep with an integrated wire stripper, as well as a live wire detector that can sense electrical currents from up to an inch away, before you find out by touching it. It even charges over USB, so you won’t have an extra charger to keep track of.

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iPhone: Virtual Private Networks (VPNs) are often a costly affair, but Opera, the company best known for its browser, released a free, unlimited VPN for iOS today that allows you to access the internet securely from a variety of locations.

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“What’s your greatest weakness” may be an awkward, tired job interview question, but if a potential employer asks it, you want to be ready. This formula can help you prepare.

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