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Author Topic: General Discussion -  (Read 14399 times) Bookmark and Share
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Happybobjr
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« Reply #240 on: 08 August, 2010, 02:10:02 »
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Quote from: chrisf1337 on 08 August, 2010, 02:02:10
You could have a lock function like on the PSPs that prevents you from accidentally turning it on (or off).

thats kind of what i am saying, except just for the power button
« Last Edit: 08 August, 2010, 02:18:58 by happybobjr » Logged
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« Reply #241 on: 08 August, 2010, 02:16:21 »
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We could also have the switch be recessed into the side, so it cant turn on/off by sliding on a flat surface. Or we could do it how current graphing calculators do it: a key combination.
« Last Edit: 08 August, 2010, 02:17:40 by fb39ca4 » Logged



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Happybobjr
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« Reply #242 on: 08 August, 2010, 02:23:17 »
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Quote from: fb39ca4 on 08 August, 2010, 02:16:21
We could also have the switch be recessed into the side, so it cant turn on/off by sliding on a flat surface. Or we could do it how current graphing calculators do it: a key combination.

the problem with that is if the calc freezes.  If we do go with the rechargeable battery, (all for it! Cheesy), we should a screw battery door, (probably a Philip's head)  That said, we should have a complete way to turn off the power without removing the battery.

sorry if i am to presumptuous.
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« Reply #243 on: 08 August, 2010, 09:04:32 »
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I like the idea about the power switch, just so we don't have to pull batteries in the event of a crash.  I do have a hardware question though, where are we getting the materials such as case, keys, covers, ect... that really need to be custom made for a calculator?
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« Reply #244 on: 08 August, 2010, 11:51:23 »
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Well im assuming the first designs will be on a breadboard? Smiley.
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« Reply #245 on: 08 August, 2010, 15:38:59 »
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the problem is that we need an initial amount of money before we can do anything about making more than one. ie. shark tank.
the problem with this is that we will need to sell the calculators for more than 20 cents more than it takes to make them.
We will need some real investor's  but never let any one person invest enough to be part of the project.

I am all for the Pandora way.
but different.

Ok, everyperson who helps/invests will be part of the advertisement.  Each will get to own/buy/borrow an ot calc, and give it  to one of their math teachers for a year, requesting that they show it off to other teachers and students, and if kos is better than ti's, recommend it to students getting a new calc.

Remember, selling for the price to make will make a product live then die,
Now if you sell it for PtM plus part one of one more, the product will thrive.
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« Reply #246 on: 08 August, 2010, 16:25:02 »
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Quote from: tr1p1ea on 08 August, 2010, 11:51:23
Well im assuming the first designs will be on a breadboard? Smiley.
Partly maybe...I believe we are opting for a devboard, at least for the ARM version. I think with BenRyves's help we can do the eZ80 version without a devboard. I do ahve some breadboards and quite some components too though so I can do some testing if needed. I think I could buy a eZ80 as well, albeit I am not sure if my local electronics shop has it...

I first want to see a structured plan of attack. Then we can start prototyping.
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« Reply #247 on: 08 August, 2010, 21:05:17 »
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Quote from: happybobjr on 08 August, 2010, 02:23:17
Quote from: fb39ca4 on 08 August, 2010, 02:16:21
We could also have the switch be recessed into the side, so it cant turn on/off by sliding on a flat surface. Or we could do it how current graphing calculators do it: a key combination.

the problem with that is if the calc freezes.  If we do go with the rechargeable battery, (all for it! Cheesy), we should a screw battery door, (probably a Philip's head)  That said, we should have a complete way to turn off the power without removing the battery.

sorry if i am to presumptuous.
we could have a reset button on the back
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« Reply #248 on: 08 August, 2010, 21:06:43 »
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Or, we could have the on/off button send the message to the OS to shut down, or if it is held for longer, it would force a shut down.
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« Reply #249 on: 08 August, 2010, 21:15:05 »
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Can we stop this discussion here, and move it to either the z80 or arm topics, whichever calc it is?
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« Reply #250 on: 08 August, 2010, 21:17:31 »
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No, but I'll change the name
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« Reply #251 on: 08 August, 2010, 21:18:47 »
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Okay.  Then, we can discuss the z80 in the z80 topics, and arm in the arm topics. Thanks.
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« Reply #252 on: 08 August, 2010, 21:28:29 »
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Quote from: graphmastur on 08 August, 2010, 21:18:47
Okay.  Then, we can discuss the z80 in the z80 topics, and arm in the arm topics. Thanks.
No, I am merging all existing topics into this one.

kidding, good idea. Tongue
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« Reply #253 on: 27 August, 2010, 01:49:14 »
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Question: Have we found someone to put the calculators together properly? Because I think that it would be a shame if all the plans were worked out to perfection and the calculators couldn't be made because of that.
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« Reply #254 on: 27 August, 2010, 01:52:23 »
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Quote from: guy6020665 on 27 August, 2010, 01:49:14
Question: Have we found someone to put the calculators together properly? Because I think that it would be a shame if all the plans were worked out to perfection and the calculators couldn't be made because of that.

That's indeed a question raised by Kerm on Cemetech.
My answer: anyone good with building electronics. Kerm is kind of busy, but he does have access to fun tools Smiley
I can do some soldering, provided that I have some time and schematics to work with.
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