Techrecipe

Turn your obsolete calculator into a wireless keyboard?

There is a person who has turned an obsolete calculator into a Bluetooth wireless keyboard. A user who lost use of an HP48 calculator found a different recycling method.

By adding a wireless Bluetooth connection (Adafruit Feather nRF52 Bluefruit), the inside of the wire is tangled, but the function has been changed so that you can use the smartphone app by connecting wirelessly.

I used the open-source calculator emulator (Sébastien Carlier Emu480), and I programmed each button in the software to react when the keyboard was pressed. Details can be found here.

lswcap

lswcap

Through the monthly AHC PC and HowPC magazine era, he has watched 'technology age' in online IT media such as ZDNet, electronic newspaper Internet manager, editor of Consumer Journal Ivers, TechHolic publisher, and editor of Venture Square. I am curious about this market that is still full of vitality.

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