Author Topic: General Discussion  (Read 86184 times)

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Offline Happybobjr

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Re: Let's build our own calculator!
« Reply #240 on: August 07, 2010, 08:10:02 pm »
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: August 07, 2010, 08:18:58 pm by happybobjr »
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Offline fb39ca4

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Re: Let's build our own calculator!
« Reply #241 on: August 07, 2010, 08:16:21 pm »
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: August 07, 2010, 08:17:40 pm by fb39ca4 »

Offline Happybobjr

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Re: Let's build our own calculator!
« Reply #242 on: August 07, 2010, 08:23:17 pm »
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! :D), 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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Offline Builderboy

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Re: Let's build our own calculator!
« Reply #243 on: August 08, 2010, 03:04:32 am »
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?

Offline tr1p1ea

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Re: Let's build our own calculator!
« Reply #244 on: August 08, 2010, 05:51:23 am »
Well im assuming the first designs will be on a breadboard? :).
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Offline Happybobjr

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Re: Let's build our own calculator!
« Reply #245 on: August 08, 2010, 09:38:59 am »
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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Offline matthias1992

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Re: Let's build our own calculator!
« Reply #246 on: August 08, 2010, 10:25:02 am »
Well im assuming the first designs will be on a breadboard? :).
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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Offline tloz128

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Re: Let's build our own calculator!
« Reply #247 on: August 08, 2010, 03:05:17 pm »
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! :D), 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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Re: Let's build our own calculator!
« Reply #248 on: August 08, 2010, 03:06:43 pm »
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.

Offline jnesselr

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Re: Let's build our own calculator!
« Reply #249 on: August 08, 2010, 03:15:05 pm »
Can we stop this discussion here, and move it to either the z80 or arm topics, whichever calc it is?

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Re: Let's build our own calculator!
« Reply #250 on: August 08, 2010, 03:17:31 pm »
No, but I'll change the name

Offline jnesselr

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Re: General Discussion
« Reply #251 on: August 08, 2010, 03:18:47 pm »
Okay.  Then, we can discuss the z80 in the z80 topics, and arm in the arm topics. Thanks.

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Re: General Discussion
« Reply #252 on: August 08, 2010, 03:28:29 pm »
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. :P

Offline guy6020665

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Re: General Discussion
« Reply #253 on: August 26, 2010, 07:49:14 pm »
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.

Offline alberthrocks

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Re: General Discussion
« Reply #254 on: August 26, 2010, 07:52:23 pm »
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 :)
I can do some soldering, provided that I have some time and schematics to work with.
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