A gift from my Calculus teacher upon graduation.

Yes manual included. Sadly the 0 (zero) button no longer works, due to battery corrosion… ☹️

  • Meeech
    4•2 months ago

    Open that bad boy up and grab some vinegar and a qtip. It’ll remove the corrosion!

    • @over_cloxOP
      5•2 months ago

      Already been there and basically done that actually, but with rubbing alcohol and a pencil eraser.

      If vinegar is used (yes I’ve done that before as well), then it needs to be followed by a baking soda/water solution to neutralize the acid.

      I believe the remaining problem is a corroded via, which connects the layers of the board together.

      It’s only a 2 layer board, so I might get it fully fixed one of these days. Totally within my skill set, just not high on my priority list…

      • @NewNewAccount
        7•2 months ago

        Humanity went centuries without 0s, you’ll probably be fine!