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TI Calculator Help

I have the TI-84 Plus Silver Edition and I have some questions. First I need to know how to graph the equation (x is greater than or equal to y) Also I put the quadratic program on my calculator but it gives the answer in decimal form, how do I view it in fraction form or is that even possible??

Topic by thouse    |  last reply

TI-connect for calculator

I'm having trouble loading "TI-connect" on my mac so that I can write programs for the ti-84 on the computer. After downloading ti-connect, I click on it, and it seems to want to install it again. I've done the complete loop, repeating the download process about 4 times.  Do any of you know what to do?

Topic by Toga_Dan    |  last reply

TI-83 Buttons not working

On my TI-83, the bottom two rows of keys do not work. I took it apart an did the 'Contact Cleaner' but still no luck. Actually, the bottom rows and the 'trace' 'graph' and 'arrow' buttons do not work. Do I have to replace the entire board?

Question by speedinc    |  last reply

Calculator IM

At my school we are required to have these TI-83 plus calculators for math. Of course we have classic games and stuff that we put on there, but we want to try to put an infrared emitter and detector on it so we could send IM's within the room to each other. Kinda like texting. Could anyone help us by suggesting ways to do this?

Topic by Jordo    |  last reply

Old TI-85 Uses

I just got a TI-85 at a yard sale for a dollar. I already have a TI-84, so I have no need for it for school. Any ideas on what I use it for? Can I take it apart , build anything with it? Here are the specs: It has a Zilog 800 cpu

Question by Bostonians    |  last reply

How can I make my computer recognize my TI 89 Titanium calculator?

I installed the TI 89 Titanium calculators installation disk before i plugged it in, like it told me to. At first things went well. I plugged in the cable after TI Connect was installed, and it installed the hardware. However, after it recognized the calc, i went on to update its OS. After I did, long and behold, the calc could no longer be recognized!!! it was OS version 3.00 for the TI 89, all i did was pressed the update link on the ti connect thing. Any help? The calculator is very new, probably 4 days old now and like i said before, the computer recognized it at first but now it cannot.

Question by Gigafrost    |  last reply

Is it possible to download 'ndless and the gameboy emulator on the ti nspire cas?

I have attempted to download the emualtor for the gameboy on my ti nspire cas. But it did not work, i'm pretty sure it won't work, because in the readme file it said they only tested it on the ti nspire.

Question by flashanimator    |  last reply

Where is the "pick up window" on the TI calculator website?

I am looking for the pick up window on the TI website. Does anyone know where it is?

Question by DELETED_afw11    |  last reply

Does anyone have simple programs they made on a ti-83/84 graphing calculator?

I have been making some and i want to see what other people have made and see how so i can farther my understanding

Question by evilskaterpyro    |  last reply

Interfacing to a TI Graph Calc

I was looking at how to interface an lcd screen to a microcontroller and learned they have a 14-16 pin interface. Guess what I found out? An old Texas Instruments calculator I tore apart has a 14 pin interface on the lcd screen, with the first two pins being power! Just like on a regular lcd screen! I am going to atempt to interface my OOPIC to it! If this works, I promise you there will be an ible!

Topic by gimmelotsarobots    |  last reply

Programming in TI Basic

Just wondering if anyone else here programs their TI calculators using the built in language.

Topic by sardines454    |  last reply

TI 84 Plus silver edition archive problem... Answered

I accidentally deleted all my archives on my calculator and that deleted all my applications, like block dude and stuff like that and i want to get them back, I have a connector cable to other calculators and the computer. Thanks

Question by squirt8500    |  last reply

Calculator Programs for Math

I've been working on some programs for my calculator recently and have decided to share them. I made these myself from scratch. If you want to modify go ahead just credit me. Don't sell them. And don't use them in math class if your teacher says not to. The programs are a follows: a quadratic formula solver, parabola solver, slope of a linear equation finder, and y-intercept finder. The programs work on TI-83's and TI-84's. If you have questions on how to use them or how to put them on your calculator please leave a comment!

Topic by sardines454    |  last reply

How can I re-align the screen on a TI-85?

I obtained a secondhand TI-85 for a dollar today. It didn't power on, so I removed all the batteries and put a jumper across the contacts for the memory backup, which cleared the memory and reset everything to default. HOWEVER, The LCD seems to be calibrated 4 pixels off. When anything is entered into the base screen, the left four pixels are off the display, leaving the fifth column of the character to be nudged up against the left side of the display. When I graph something, however, the display is centered. Any ideas what could be causing this? A second "Reset All" didn't help. I'm a TI-83 user, so I'm not familiar with the TI-85 interface.

Question by CameronSS    |  last reply

Using precalculus to write a TI-84 program

Hello everyone, I am in a precalculus class, and I am attempting to do a project on practical application. The majority of students use the TI-84 for various math courses.  They are also available in the library to rent.  Unfortunately, few students take the time to actually use this wonderful tool.  I would like to create a web-type video that can be posted on the course's forums, giving a demonstration on creating simple TI-84 programs that could be used to make life a little easier.  Take a concept out of the book, and demonstrate the practical use. Most of my hobby activity involves electronics of some sort.  I have a bad habit of explaining things far too technically.  I have difficulty explaining things in simple terms.  My goal with this project is to learn how to explain concepts in terms others can understand, and possibly to help someone else learn. After many scrapped ideas and half written programs, I was thinking of writing a simple program that calculated the maximum number of lightbulbs that could be safely connected to a 15 Amp breaker.  I suppose it would be easy enough to allow the rating of the breaker to be a variable, but first things first.  Don't want to get too advanced before I have a clear working model.  Can anyone suggest another role that functions play in our every day electrical/electronic life? Many thanks.

Question by huck alexander    |  last reply

Building probe/sensor for TI Nspire CX CAS?

My TI Nspire CX CAS just arrived in the mail today!  It's an upgrade from a TI84, and my reliable old TI82.  Just a quick search yields a lot of information on how this calculator can be used as much more than a graphing calc. There is software available for scientific use, which incorporates specially designed probes to measure everything from sound to pH levels.  One that caught my eye as a possible diy project was a microphone.  It appears that there is an application that is capable of measuring and mapping sound waves.  An interfacing microphone.  Can't be too difficult, can it? As soon as it arrived, I popped on to Instructables and did searches for anything Nspire CX related, but received the dreaded "no results found".  I'll have to get to work.  Does anyone have any experience with this calculator or it's data functionality? Thanks!

Question by huck alexander    |  last reply

How do you 'prompt' or 'input' characters when writing Ti-Nspire Programs?

Im used to writing programs for the Ti-84, but my school made us switch to nspires and writing programs are completely different. how do i use input commands?

Question by holy_cow    |  last reply

WANTED: Your Ways to inscribe / label / letter plastic cases 'n stuff REWARD :)

Hi Folks Did you ever successfully apply a small lettering onto something? Your methods of making labeling/lettering on a quite small scale would be very appreciated!Maybe people from the miniature/model scence have some idea?I want to 'casemod' my TI-92 Plus and CBL-2 to look similar AND nicer. They are housed in some not that beautiful grey plastic. I thought of just applying some primer and paint, but that would make all the important small inscriptions disappear and since there are plenty of them, I can't have that. I bought some letraset lettering sheets on ebay, but those are only one color and a bit too big...WANTED:A method to apply small (<=0,1 inch) yet accurate lettering onto plastic/metal/paint. Durability is not important since I will apply about 5-10 layers of varnish. Some opacity/covering power would be good though. And I need to be able to do it in at least two colors.REWARD: I offer two (full) cases of Altoids for the person, whose technique I use in the process. (Of course an instructable will document the build!)This is kind of arbitrary but I want to spice up the deal a bit...Thank you!Maniacy

Topic by Maniacy    |  last reply

Soldering a TRS to TRS cable?

I am trying to make a transfer cable for my TI-84 Plus Silver Edition Calculator. It came with a USB-mini to USB-mini cable, but it has two ports on top. One for a USB-mini cable, and one for an I/O cable, with 3/32 TRS jacks (2.5mm) from Radio Shack. I am wondering how to connect two TRS jacks together to make a transfer cable. I don't know what kind of wire to use, or how the wires should be connected.

Question by Pettrocity    |  last reply


1. I want to know how to calculate the fuel intake ti the engine per minute for any kind of engine. 2.can i use contralable amount of pure oxygen to improve effeciency,millage,and pollution?

Question by saikrishna.voonna    |  last reply


This circuit pulls energy from thin air Most of us are familiar with Texas Instruments (TI) as the company that made the graphing calculator we used in school. Calculators made be the company’s bread and butter, but that’s not all they’ve been up to. TI recently introduced the industry’s lowest power DC/DC step-down converter, a tiny circuit that could allow future electronics to power themselves without batteries or wires. The tiny power circuit allows mobile accessories and wireless sensors to manage microwatts generated from solar, thermoelectric, magnetic and vibration energy, which could eliminate the need for bulky, toxic batteries in the future. A

Topic by iceng    |  last reply

How could I calculate the best lengths for a barrel of an air powered shotgun?

Hey there community, i have asked a couple questions here before and i appreciate your answers so very much. this is why i have come to you today again to ask anotger. first off, sorry fir my grammar and spelling errors  im on my phone. now on to my question... i am building an air powered shotgun because i love bb guns and pellet rifles. however, there is no pellet shotgun really out there on the market that is of good quality. so, i want to make my own. . i am following kip kays law rocjet paintball launcher design, but i want to put a barrel that has many .180 in. diameter tubes within it to contain the BBs. the thing that is going to powere it is a  12g co2 canister that is hooked into a paintball quick change cylinder. I know tyat i must do math in order to get the right chamber to barrel ratio. i want the enrrgy within the canister ti be put to use as efficiently as possible, that is so that i am not wasting energy and that i have enough energy. so, any help would be appreciated. thanks again

Question by XBLmonster    |  last reply

Voltage quality recorder? Answered

Hello, i am an electronics hobbyist, and want to develop an system which is an voltage quality recorder, i mean it measures the various voltage disturbances like transients, swells, sags, THD, etc, I was comfortable in analyzing the concept and with the software too. but for the hardware implementation i am confused of which kind of TI microcontroller or microprocessor is suitable for my project. i will work on the real time calculations and will use FFT in analyzing the voltage.I am planning on dsp processors of C2000 series of TI. But not able to wisely choose them. On what major parameters should i look upon while choosing them. I would be helped if anyone can suggest me which one would precisely be used for this cause. Any more suggestions on how to proceed with it are welcomed. Thank you.

Question by Tejas Narayan    |  last reply

Nikon D40 Question

I was reading this instructable and I was wondering if any has tried this on a Nikon D40. I don't have the link cable but I am sure I could find one at a Futureshop or Staples. I have a cable that hooks up to the computer and then my camera but it is looking like the cable might be to small. The port that looks like it might be the one, is the one above the USB port, underneath the hatch.Sorry if I am to vague, I would be glad to re-word it if you need me to.

Topic by Gimpded    |  last reply

Advice for a three-LED circuit w fading changes

Hey folks, I'd like to put together a circuit with three LEDs, all different colours, and the ability to fade between them at will. It's for a Sims costume, so the LEDs will be about a foot above my head in an enclosed and I'll need to conceal the switch somewhere on my person, like a pocket or under a shirt. I know pretty much zero about practical electronics, so I don't even know what terms to search with. If anyone can point me towards an existing instructable, or even just give advice on what components I might need to use, that would be sweet :) Edited to add: because I know nada about electronics, I'd like to be able to do this with simple components. I know this could be done with an arduino, but I can count the number of times I've soldered with one hand, and my last programming was on my TI graphing calculator.

Topic by EmmaMuhlack    |  last reply

Help converting a plug timer to a panning motor

Hi there everyone, I want to get started with timelapse photography, but buying expensive gear is not an option - an DIY'ing is fun :) I want to use my TI-89 calculator to help out with the intervalometer job, and I've ordered a fitting cable, and will be programming the stuff when it arrives. So far, so good. In addition to that I want to add some panning action. For the purpose of automating that part I found a plug timer (correct term?) lying around. I disassembled it, wanting to find a way to mount my tripod head or some other camera mount (like a 1/4" 20 thread). Anyways - the middle part with the Philips-logo is not moving while in action, while the spinning clockface around it is very thin. The size, though, fits my Manfrotto tripod head perfect, even though it's heavy as shit - and with a camera on, it's even worse :) Well - I need some tips for constructing this bad boy - how to go about it, what to do, and what not to do :) Anything is welcome. Attached is a hell of lot of pictures. Oh - and any suggestions for coping with morning dew, if the camera has to stay outside for 3-4 hours during timelapse? :) Thanks a bunch, F

Topic by kirkeskov    |  last reply

Using a PDA as a timelapse computer for controlling my DSLR

I posted a similar message in reply here: But no-one replies...The above instructable and the timelapse instructable using a TI calculator, inspired me in thinking about using my PDA with a time-lapse program for controlling my Olympus E-510.I want a program on my PDA with the capability of completely controlling my camera. I don't want to use a laptop, because that doesnt fit in my pocket and I dont want to use Olympus software, because.. becasuse it doesnt have a program for my PDA.My PDA has windows-mobile 6. (dutch)(english isnt my native language)In my vision this "to-be-developed" program must have the capability of setting things like shutter speed, aperture, whitebalance, etc And things like mirror-up with bulb exposures.But most of all timing large exposures with bulb and timing for repeated exposures for timelapse photography.I found this: But that's for a Palm PDA (and some other camera) and is not completely what I want.Too bad I'm not a software engineer. So who can help me?Can somebody make a program for a windows-mobile platform, or is that a problem because of royalties for our just retired friend Bill Gates?Than, what other possibilities do I have?

Topic by NiekZ    |  last reply

Spy Glasses, Animatronic Lion Mask, Speed Up Your PC...

Sign-up for our newsletter here. Jan. 10, 2008 Welcome back. Instructables is a finalist for Best User-Generated Content Award in the Crunchies over on techcrunch. We'd love to win so vote for us! The Homemade Holidays Contest closes this weekend. Enter now or wait till next year! The Laser Cutter Contest finalists have been announced! Check out these cool instructables! WinXP Overhaul Guide: How to make it look like Vista & run like lightning Give your Windows XP installation a complete overhaul with an updated interface, speed tweaks, and free software. Who needs Vista? posted by CharredPC on Jan 9, 2008 Pipe Loft Bed Get more space in your cramped dorm room with a trip to the hardware store and some quick construction.posted by nerdologist on Jan 5, 2008 Realistic, Animatronic Lion Mask with stereo night vision and amplified hearing Build a realistic lion mask with moving jaw, stereo night vision/color vision system, and amplified hearing augmentation. posted by Solion on Jan 8, 2008 Covert Spy Sunglasses Make your own sunglasses that secretly record video and audio for less than $50. Remember to use these powers for good and not evil, OK? posted by Kipkay on Jan 9, 2008 Making an army of Gromit's (Claymation Mold making) Fancy making a stop-motion animation Aardman style? Chances are that you will need more than one clay figure. You'll likely need an army. posted by edwatkins on Jan 8, 2008 Show off your project and win Lion Brand yarn!Contest closes this weekend! Shadow or Illusion Knitting Shadow knitting, or illusion knitting, is a process of knitting such that the finished piece has a hidden image only viewable from an angle. Learn how.posted by ERNesbitt on Jan 7, 2007 Give your loved one a real "fallen star" It may be romantic to name an anonymous dot in the sky after your loved one, but how about catching a real "fallen star" for them? posted by Kiteman on Jan 6, 2008 Perfect English SconesA recipe for the perfect rustic english scone which goes with sweet or savory foods like clotted cream and jam or parmesan and spinach... yum.posted by dancook on Jan 5, 2008 Noise Free HDD Does your computer's hard drive sound like it's getting ready for lift-off? Use this trick to bring some peace back into your life. posted by liknus on Jan 7, 2008 Turn a TI Graphing Calculator into an Intervalometer and Create Time Lapse Videos A quick and cheap way to make time lapse videos with a DSLR and a calculator that is quick, cheap, and requires little time or skill. posted by yonderknight on Jan 5, 2008 Laser Cutter Finalists! We looked at over 600 entries for the Laser Cutter Contest and decided on 14 finalists for the VersaLaser worth over $15,000. Now the voting is open to Instructables users until Jan. 31. Vote for your favorite Instructables! Check out the 2008 Instructables and Universal Laser Cutter Contest Finalists Announcement to see all the finalists and 20 second prize winners. Or you can go straight to the Voting Page to cast your votes now.   Now go make something awesome, and I'll see you next week! - Eric

Topic by fungus amungus    |  last reply