Is it plausible to gut a calculator, replace the mainboard with a Raspberry Pi and give it API access to some AI?

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I'm toying with the idea of gutting a regular scientific calculator (like a Casio fx-82MS or fx-991ES Plus), removing the mainboard, and replacing it with a Raspberry Pi Zero W.

The goal: to turn the calculator into a covert AI interface.
Basically:

  • Use the original button pad as a matrix keyboard (wired to GPIO)
  • Replace the LCD with a 0.96" I2C OLED or a 2.8" TFT display
  • Power it with a flat Li-Po battery and boost converter
  • Connect to the internet via Wi-Fi
  • Use Python to send typed questions to an API and display the answer on the mini screen

Has anyone here done anything similar?

  • Is this plausible in terms of space, heat, and GPIO usage?
  • Any issues I should expect with reading inputs from a calculator keypad reliably?
  • Any stealth tips for hiding charging ports or screens behind tinted acrylic?

Would love to hear if this is feasible or if I’m overestimating the compactness of the Pi + display + battery setup. Thanks in advance![](https://www.reddit.com/r/diyelectronics/?f=flair_name%3A%22Project%22)

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from hacking: security in practice https://ift.tt/Vour3U7

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