Computers

#135 How does Bluetooth work?

I learned this today. Bluetooth is a short range, low power technology that can transmit data over radio waves. Bluetooth works on frequencies in the 2.400 to 2.483.5 GHz short-range radio band. Radio frequencies around the world are generally regulated so that different frequencies don’t get mixed up. That is why different radio stations broadcast […]

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#75 How does a QR code work?

I learned this today. All of the black squares in a QR code represent certain pieces of information. QR stands for Quick Response. They were invented in 1994 by Masahiro Hara. He was working for the Japanese company Denso Wave and he got the idea by looking at the black and white pieces on a

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