ti-84 LED mod

Add lights to your graphing calculator. Do it now. [Sil3ntP8nd8] added some, and seems to have done a decent job. They are spread around the back, supplying a nice even light on, well, on whatever is under your calculator. It may be difficult to see too much detail though on account of the water marks. You have to protect your intellectual property though. This almost compares to the DS LED monstrosity we covered recently.


  1. walt says:

    ummm. ok

  2. dax says:

    “intillectual” <- meant to be a pun?

    kinda neat hack, but wouldn’t a backlight be more useful than a flashlight?

  3. Caleb Kraft says:

    ha, no firefox doesn’t see that as misspelled for some reason. Thanks for the heads up.

  4. iben says:

    yes i agree with dax.

    Wouldn’t a backlight be more useful anyways good mod and nice job

  5. ngth says:

    What’s with the techno music?

  6. Slawek says:

    “Did you just pull out my batteries?” Yes “Dude! I didn’t have my games archived. NOOOOOOO!”

  7. aztraph says:

    hi brightness LEDs: <$20
    Time involved 10 mod the case: couple hours
    getting everyone viewing the video to tilt their head slightly and say “What?!?”: Priceless

  8. Sil3ntP8nd8 says:
  9. aztraph says:

    ugh, i just got punked in binary.

  10. lessthanchris1 says:

    why bother?

  11. UltraApple says:

    Seriously the calculator equivalent of street glow? Whats next a foam body kit and a sticker on the battery door? Some people’s kids!

  12. Sp`ange says:

    Is there no on/off switch?

  13. roshamboe says:

    if you want the respect of your classmates, youll never do this hack

  14. adamastor says:

    useless hack!!

  15. zigzagjoe says:

    uselesssss and the vid is phail.

  16. nick says:

    lame ass hack for two reasons. 1 not even a switch for on off, or even a relay function tied to “on” to control the leds. 2 the leds are on the back and would be more of a help to have a back light then saying “look at me teacher im probably going to cheat in class with this calculator that is glowing”. also uber nerd bling, but nerd bling is cool.

  17. andrew says:

    you’re going to regret it when your batteries die during a test.

  18. Sil3ntP8nd8 says:

    If you looked at the flickr there is a switch :)

  19. ben says:

    It’s a sad day when this makes hackaday. It’s also the day when I stop checking this site regularly. :(

  20. Toast says:

    aside from it not being a “hack”… this mod isn’t even slightly amusing. I can take my TV remote and put LEDs on the back of it…my steering wheel…or even on the bottom of my toaster. The music fails to even bring a slight change of mood…im still stuck at wtf. If he wants to make this a real mod or “hack” he would get at least 555 timer and start strobing(?) stuff. …or make backlit buttons! AH HAH now theres an idea

  21. youthinkidpostmyrealname? says:

    Hooray! Now I can have a pimped out ti! w00t…

    If I had this calc… I would totally put something that broadcasts to the world I have a small peni… I mean a spoiler on this. Because everything is cooler with spoilers and undercarriage lights, right?

  22. srilyk says:

    I concur that nerd bling is cool… but this just doesn’t quite seem like nerd bling so much as a little bit of fail (although leds are cool.)

  23. Pouncer says:

    I’m not usually one to complain, but I submitted an article about someone who hacked a child safety switch into their fridge ice/water door over a month ago, which has yet to be posted on HAD.

    But this LED hack was apparently more note-worthy enough to make it. Color me confused.

  24. Caleb Kraft says:


    There are a number of reasons why a hack won’t get posted. It is quite possible that some big news event happened and yours slipped through the cracks. I’d be happy to look at it. We’re always looking for better stuff to write about.

  25. crobicha says:

    And the purpose of this is…..?

  26. kenny says:

    I added a backlight to me TI-89T a while ago, took out the metal spacer and removed the film beneath the LCD. I cut a piece of plexiglass up and put it under the LCD. Then I noticed that I removed the polarizer film, too -.-. I dug up an old LCD and tore some pol film off of that, finally got the LCD working properly again, added some EL film for the lighting and voila!

  27. will says:

    hack? this is no hack. its stupid. another way to drain your batteries. useless…

    admin, please moderate your site mare carefully. think of all your usual “hacker” readers. who would do this and call it a hack?

    to be clear: post like this sucks! give us something we could use. im very disappointed by the author of this post and by site moderators.

  28. Qualsiasi says:

    I wont do that to my Titanium, indeed I’d like to see some wireless implemented so I can cheat on exams (like wireless comunications exam ^_^ ).

    Another nice hack would be li-ion rechargeable battery, or CF/SD I/O to store programs… just some ideas.

  29. Tyler Caine says:

    THAT’S AN EXPENSIVE FLASHLIGHT!!!!! But it is true that it’s useless…. sorry…

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