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This is an archived, read-only copy of the United-TI subforum , including posts and topic from May 2003 to April 2012. If you would like to discuss any of the topics in this forum, you can visit Cemetech's Calculator Hardware subforum. Some of these topics may also be directly-linked to active Cemetech topics. If you are a Cemetech member with a linked United-TI account, you can link United-TI topics here with your current Cemetech topics.

This forum is locked: you cannot post, reply to, or edit topics. Calculator Modifications => Calculator Hardware
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iklln6


Newbie


Joined: 05 Oct 2009
Posts: 11

Posted: 05 Nov 2009 01:27:23 pm    Post subject:

added bonus: USB ports supply 5V, possible USB power cable
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ztrumpet


Active Member


Joined: 06 May 2009
Posts: 555

Posted: 05 Nov 2009 05:45:11 pm    Post subject:

Wow, these sound quite cool.

Keep up the great work.
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christop


Newbie


Joined: 17 Oct 2009
Posts: 5

Posted: 06 Nov 2009 12:50:57 am    Post subject:

iklln6 wrote:
added bonus: USB ports supply 5V, possible USB power cable

hm, I should look into doing that too, especially considering that the previous project I mentioned in my post involved splicing a phone charger cable to a USB cable so I could charge my phone using any USB port. The other half of that project was turning a 5V car charger into a USB charger, so I could charge nearly any USB device in my car (GPS, iPod, Sansa, and now my phone!). All of that cost me only a few bucks and a couple hours of my free time. Cool

Thanks for the great idea!
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christop


Newbie


Joined: 17 Oct 2009
Posts: 5

Posted: 06 Nov 2009 10:51:38 pm    Post subject:

Ok, I had today off of work, so I made a USB to "wood battery" adapter. It's basically the same as the one I made using a 5VDC wall adapter. Here's a picture of the results:

I wasn't very careful hammering the nail in, as you can see it poking through the left-hand dowel. :)

Now, the TI-86 doesn't have a mini USB port like the TI-84+ and TI-89Ti, but I wonder how difficult it would be to add one just for power (it would be pretty difficult to make it capable of transmitting data, though, as it would require software support on the calculator too). Also, on those calculators that do have USB ports, it shouldn't be too difficult to make it power the calculator without batteries, and maybe even add an electronic switch to disable power from the batteries when external power is available.

EDIT: does anyone know where I could get some inexpensive female mini B USB ports, preferably without taking devices apart just to take their USB ports?


Last edited by Guest on 06 Nov 2009 11:06:40 pm; edited 1 time in total
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