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Calculated Desperation


Calculated Desperation

Submitted by: Gary Gehiere via Submit a Kludge!

Most kids get a TI-89 without even considering its illustrious past. Much like the precursor to the T-800, this calculator is functional but not pretty.

Favorite Comment: Fixer Thadius says, “I wouldn’t be so quick to judge that the switch turns on/off the calculator. For all we know, that’s a kludged doomsday device activation protocol.”

Incorrect source or offensive?

» 51 comments

  1. first says:

    this looks like my time traveling machine

  2. Elk says:

    Wow. I haven’t seen a calculator like that in years.

    • kc/cc says:

      My parents used to have a 1970-something TI that they kept up on a high shelf in a kitchen cabinet so the kids couldn’t mess with it. It was a pretty expensive gadget to own at the time, I suppose, and it had its own fancy-schmancy carrying case, even.

      Whenever we did get ahold of it, though, we only used it for important stuff, like spelling words upside down: HELLO, BOOBLESS… oh, you guys know the drill. :D

      • JB says:

        You can also write LOL!

      • Alleycat says:

        I can’t bear to think that because of the advances of technology, my kids will never have the pleasure of typing 55378008 into a calculator and then giggling incessantly as they hold it upside-down. For example, I think the calculator font on my iPod Touch is Times New Roman. The memories. *sigh*

  3. Ryan Newman says:

    Sad thing is that toggle switch likely cost more than a new calculator, since you can by calculators at every dollar store across America!

  4. kc/cc says:

    I guess this is just out of determination to keep an old calculator out of the landfill. Mine has all the functions of this one, and it cost me a dollar at Walmart five or six years ago.

    (Quiz: How many calculators could I have bought for the cost of one switch? What’s that? You don’t know, because your calculator isn’t working?)

    Of course, I have to concede that mine doesn’t have the awesome red or green numbers I expect to see here, so carry on.

  5. coffeecup says:

    Something here just doesn’t add up…

  6. Katie says:

    Toggle switches are much more fun to use than pushing a simple on/off button!

  7. glyptodon says:

    Just in time for tax season, a calculator with an “undo all” function!

  8. classic says:

    The switch turns on the “show your work” option.

  9. Thadius says:

    I wouldn’t be so quick to judge that the switch turns on/off the calculator. For all we know, that’s a kludged doomsday device activation protocol.

    • Tim says:

      The “Armegeddon Key” was standard on HP calculators in the eighties, but no one could figure out how to make it work with reverse Polish notation.

  10. Challenger says:

    Just after getting out of the Army in ‘72 I worked at the TI calculator assembly plant in Dallas. The transistors at the time were as big around as the end of your little finger. They had three long wire leads on them that had to be formed and cut to fit into the calculator printed circuit boards. The circuit boards started at one end of the line and they got stuffed with parts, by HUMANS, including those giant transistors as they walked down the line. The most expensive calculators had three transistors, while others has two. They cost in the hundreds of dollars for five or six primary math functions. Mine still works today except for a couple of the LED ‘wires’ are burnt out. One of the best products TI ever made.

    • Kay says:

      I remember the excitement of friend being able to afford one of these.
      And one of my boy friends gave me a transistor or thyristor, big enough to be bent into what was technically a finger-ring. (Wish I knew where that is, probably long gone.)

  11. Joe Btfsplk says:

    Looks like the remote control for my flux-capacitor.

  12. dono1 says:

    I’m most impressed with the blue plastic Pendaflex tab held on with Scotch tape that serves as the screen protector. That calculator must really have some sentimental value to go through all that effort to keep it working.

  13. vatel says:

    looks like fallout 3…

    • Veran says:

      i guess it is an early prototype of the pip-boy wristmounted computers.
      ofc, it would be highly impractical to have to fish it out of your pocket every time you need to change weapon…
      or it is a recreation of the fusion-pulse charge, continuing on the thought of it being a doomsday activator.

  14. Dogmeat says:

    I’m still not clear how installing that mini joystick is going to give you and your fellow mathletes the advantage over your competitors at the next meet.

  15. herpyderp says:

    My father once said: “Son, you can play your fancy little Tetris games on your calculator, but when I was your age, all we had was Pong”.

  16. JB says:

    Where’s the touchscreen?

  17. kmelew says:

    It’s a divide-by-zero override switch!

    • Schreukat says:

      student: “Ok, lets see….two trains leave the station….mnnhmm…40…carry the….” tap,tap,tap. “and then i hit the equal button aaaaaand” tap….
      (calculator hums ominously to life)
      Student: “Oh…Oh God! OH GOD NO! HELP!!!”
      Professor: “What is it!?”
      Student: “I..I think I divided by Zero! What do I do!?
      Professor: “Damn fool of a child! Quick, throw the override!”
      Student: “The what!?!?!?!?!”
      Professor: “The switch! for the love of all that is Holy, TOGGLE THE SWITCH!”

  18. TexasDan says:

    I miss my HP 32sII. RPN FTW.

    • Zabinatrix says:

      My sister had a RPN HP. I thought it made so much sense and would have loved to have one, but I had already bought a nice, spanking TI-86 with normal, human notation and by this point I’ve already forgotten why I ever loved RPN :) I guess a bit of my nerdness has died with time, I’m sad to say.

  19. says:

    The switch toggles between calculator and time machine.

  20. Time Kitten says:

    This looks like the perfect solution to the On/CE button.

    So many years… so much inability to turn calculator off before five minute mark to save battery life …

  21. FordsTowel says:

    I guess you had to be there. This ‘kludge’ was common among those of us who didn’t want to pay extra for the same calculator with a memory function. If you had a modicum of soldering skill, and a cabbaged toggle switch, you could add the ‘amazing’ memory function to any four function calculator of the time.

  22. FordsTowel says:

    Should have added that: Yes, this calculator already had a memory function, but not the memory-swap capability.

  23. Strife says:

    I own a pair of TI89’s (it’s a long story), but I keep my dad’s college calculator as a spare. It’s an ancient 81 (height of cold war technology!). The joke in my calc class currently goes, “fear Strife’s 89, it’s the anti-christ. Fear the radiation from the 81.”

    My attempts to reduce the radiation leak with duct tape went somewhat well, but then I had to change the batteries.

  24. Emerson says:

    Look Macgyver, walk over to the dollar store and buy yourself a new one.

  25. boringTroll says:

    I had a calculator of that vintage with wires coming out of it.
    If you typed +1= it would add 1 every time you hit the “=”. So it worked as an electronic counter. I added a photo sensor. This was around 1974. The calculator was really cheap, because it came off of the broken stuff table at RadioShack. Easy to fix. Yes kids, in my day, it was possible to repair electronics.

  26. Inkhorn says:

    If you cut the black wire, the calculator can reduce irrational numbers to fractions. If you cut the red wire, it explodes.


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