Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Ti-84 Evo

education.ti.com

Post reply on HN
Print view View original

321–330 of 503 posts

Re: Ti-84 Evo

#321

Post by iuffxguy »

pavel_lishin wrote: post #40
vvpan wrote: post #38

We had to buy those calculators for highschool and it was a waste of money, felt like somebody must be paying somebody off to have thousands of students buy a device that they will certainly never have to use (and is of little educational value).

I certainly got a lot of educational value out of mine. I managed to program a fully functional Minesweeper game on mine, using the built-in programming tools - no transferring efficient binaries via cable! But yes. 99% of what we did with them in class - when we were even allowed to use them - could have been handled by a little solar-powered calculator with basic arithmetic functions.

Same! Ticalc.org was my original GitHub haha

Re: Ti-84 Evo

#322

Post by [deleted] »

clamprecht wrote: post #271

My TI-85 story. While I was in prison, around 1996 or 1997, I found out a friend had a TI-85 calculator. I realized it was programmable, so I borrowed it over the weekend and wrote a program to track his stock portfolio. It was the first time I had programmed anything in 2 or 3 years. Then I learned that the US Bureau of Prisons had a rule against any calculator (or device) that was "programmable". So I programmed th…

[deleted]

Re: Ti-84 Evo

#323

Post by schaefer »

I'll take my father's HP 49g to my grave. but if TI wanted to flirt with me, all it would take is a setting to enable Reverse Polish Notation. (I did check the features, and no mention).

Re: Ti-84 Evo

#324

Post by shostack »

My ti-82/83 got me into programming because I hated math so much that I taught myself to code an app that would help walk me through how to do various problems. I got in trouble but it was worth it.

Also, drug wars, x wing vs tie fighter, and all sorts of other awesome games were definitely the fun thing to do with these.

Re: Ti-84 Evo

#325

Post by linsomniac »

kstrauser wrote: post #296
linsomniac wrote: post #261

Earlier quoted context omitted.

The ground pin, when "up", is higher than the hot, so in certain situations it can prevent something from shorting the hot and neutral. Code (?) or convention requires it if you have a metal faceplate, and hospitals require it. People generally like them mounted ground down because then they look like little faces. :-) edit: Not code, just convention.

Wouldn't it short hot and ground then, and still turn the necklace into a short-lived fuse? The more practical reason to mount ground down is that wall warts with ground pins or polarized prongs nearly universally arrange them so that they're hanging down when inserted into a ground-down plug. If the plug's flipped, the wall wart's upside down and its weight is trying to lever it out of the wall.

Yes, in that case it would short hot and ground, which is effectively the same and hot and neutral, since at the main panel hot and ground are bounded together. But if it were, say, a metal credit card or something rigid, it might just fall on the ground, or could hit the ground and neutral.

Re: Ti-84 Evo

#326

Post by vkou »

vscode-rest wrote: post #247
vkou wrote: post #224

Earlier quoted context omitted.

There is no graphing problem that you'll be asked to solve before university that can't be plotted to a 'good enough for high school' level by hand in seconds . Four data points is sufficient to give you a 'good enough' shape and position of a second-degree polynomial. Five or six for a third-degree one. (And you barely see them, and don't learn how to algebraically solve for their roots in high school anyways, becau…

Life is not all about solving problems, high school life even less so. Personally, I found great enjoyment in coming up with more and more involved plots in the Polar and Parametric modes, where yes I would predict what a graph would look like and then go over to see it. And then go back and iterate. Etc. Until I was painting pictures with functions and had a far greater understanding of the domain than I’d wager any…

You can enjoy that as much as you want without the curriculum mandating or all-but-mandating that every student buy a $160 toy.

Re: Ti-84 Evo

#327

Post by adi_chaa »

clamprecht wrote: post #271

My TI-85 story. While I was in prison, around 1996 or 1997, I found out a friend had a TI-85 calculator. I realized it was programmable, so I borrowed it over the weekend and wrote a program to track his stock portfolio. It was the first time I had programmed anything in 2 or 3 years. Then I learned that the US Bureau of Prisons had a rule against any calculator (or device) that was "programmable". So I programmed th…

this made me giggle lol

Re: Ti-84 Evo

#328

Post by jonhohle »

thaumasiotes wrote: post #208
59percentmore wrote: post #178

Earlier quoted context omitted.

Must have been closer to 20 years, 84(+) didn't come out until 2004. Gonna be pedantic/crotchety about this because I got into advanced math classes but it was my brother who got the 84+ (I had to settle for a 83+). Guess who's the engineer now, and who's the NEET? Your kids pay attention to what (who) you value, folks.

> I got into advanced math classes but it was my brother who got the 84+ (I had to settle for a 83+) I had a TI-85 (maybe 86), unlike the entire rest of my school who had 83s. There was a difference: when programming in TI-Basic, variable names on a TI-83 are limited to a single character. On the 85, you can make them longer. But that was pretty much the only difference, and it will never come up if you're using the…

I was a self taught TI-Basic programmer and ran into the 26 variable limit on a choose-your-own-adventure style game I wrote. I ended up breaking it into 3 programs so I had enough variables. Programs could invoke other programs so I could navigate between states.

Re: Ti-84 Evo

#329

Post by SoftTalker »

vkou wrote: post #222
kristopolous wrote: post #62

Show me a highschool math problem you can't do on a $12 Casio scientific like the classic FX-300MS https://www.usaofficemachines.com/csofx300ms-fx-300ms-scient... There's even knockoffs of it for $1: https://www.aliexpress.us/item/3256809744184708.html I picked one up when the 99 cent store was shutting down. It works fine. Look what you can get for $20: https://www.casio.com/intl/scientific-calculators/product.FX...…

> Show me a highschool math problem you can't do on a $12 Casio scientific like the classic FX-300MS There isn't one. The TI-83 is just a $160 tax on every high school student. There is precisely zero use in a graphing calculator before university. If you ever need a plot of literally any function you'd be plotting in high school, you should be able to do a very quick, very rough approximation by hand. If you can't,…

Graduated high school in 1984, I don't think graphing calculators existed then but if they did nobody had them. Standard "scientific" calculators were what I used for all my high school and university math.
Post reply on HN