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Author Topic: TI-Nspire USB serial breakout boards  (Read 29910 times)

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Offline Hooloovoo

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Re: TI-Nspire USB serial breakout boards
« Reply #15 on: December 01, 2014, 09:08:05 pm »
Quote from: Streetwalrus on November 23, 2014, 07:35:48 am
This is the holy grail of Nspire dev. O.O Do want.
* Streetwalrus drools

And yes, the Nspire can charge via the dock as shown by the mutli calc docking station. I have no idea how it works though.
The longest pin on the connector is ground, and the second longest is power. It's that easy.
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Offline tangrs

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Re: TI-Nspire USB serial breakout boards
« Reply #16 on: December 05, 2014, 12:33:38 am »
Quote from: DJ Omnimaga on December 01, 2014, 09:04:50 pm
Wow that looks even nicer than the previous one now. I am curious about how much this would cost?

I still haven't worked out the details but a ballpark figure would be around AUD$35 (around USD$29.30) plus shipping. It'll be the board and a high quality 3D printed clamp (pre-assembled).

Version 1 should be available early January. I should have about 10 in stock but I'll get more manufactured if there's high demand. At the moment, I'm just waiting on a stencil to come so I can start bulk soldering efficiently.

After that, I'll start working on a second version with a USB host port and charging via the dock but this will take a while.

Quote
Also make sure to keep this maintained, because we never know if TI might perform slight changes on Nspire cases to make sure that this connector no longer fits. :P

For sure :)
« Last Edit: December 05, 2014, 12:40:12 am by tangrs »
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Offline tangrs

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Re: TI-Nspire USB serial breakout boards
« Reply #17 on: December 05, 2014, 12:40:54 am »
Also, for the next version, do more of you prefer MicroUSB or MiniUSB?
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Offline Adriweb

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Re: TI-Nspire USB serial breakout boards
« Reply #18 on: December 05, 2014, 12:45:31 am »
I suppose MiniUSB is more common ?
(As in, anyone can get their hands on a cable from whatever device they already own - might not be the case for MicroUSB)
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Offline Hooloovoo

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Re: TI-Nspire USB serial breakout boards
« Reply #19 on: December 05, 2014, 12:47:17 am »
If you have an Nspire, you are very likely to own a mini usb cable methinks.
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Offline Streetwalrus

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Re: TI-Nspire USB serial breakout boards
« Reply #20 on: December 05, 2014, 04:07:45 am »
Yeah I have over 9000 mini USB cables but never enough micro USB (though I have 3 now instead of 1 but one of them doesn't work for data, only power <_<).
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Offline tangrs

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Re: TI-Nspire USB serial breakout boards
« Reply #21 on: December 05, 2014, 08:03:44 am »
MiniUSB it is then :)
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Offline DJ Omnimaga

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Re: TI-Nspire USB serial breakout boards
« Reply #22 on: December 08, 2014, 02:05:10 am »
MiniUSB would be best indeed. Micro is getting much more common with mobile devices nowadays and the HP Prime comes with one but for a long while most devices used miniUSB.
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Offline tangrs

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Re: TI-Nspire USB serial breakout boards
« Reply #23 on: December 08, 2014, 09:18:18 pm »
A little late but the final prototype looks like this:





In the end, I decided that a clamp type design would work best since it fits like a adapter/plug rather than a whole case (it also cuts down on 3d printing time, complexity and material).

I will also release the STL files and dimensions of the PCB board so people can print or modify the 3d printed case to their own likings.
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Offline Adriweb

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Re: TI-Nspire USB serial breakout boards
« Reply #24 on: December 08, 2014, 10:56:07 pm »
Very nice !

(crossposted)
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Offline DJ Omnimaga

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Re: TI-Nspire USB serial breakout boards
« Reply #25 on: December 09, 2014, 02:58:07 pm »
Looks very good. :)
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Offline tangrs

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Re: TI-Nspire USB serial breakout boards
« Reply #26 on: December 12, 2014, 12:54:21 am »
Does anyone have any more information on how the USB host port works? I did manage to find this but there aren't any concrete values...
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Offline Hooloovoo

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Re: TI-Nspire USB serial breakout boards
« Reply #27 on: December 12, 2014, 12:57:34 am »
I have tried and failed to connect a USB port to the base of the calculator and I'm not sure why it didn't work. I wonder if the circuitry is necessary, because I didn't have any of those. Iirc, that graphic thing was from one of the lab cradle circuits or something and so might be able to be used the same way.
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"My world is Black & White. But if I blink fast enough, I see it in Grayscale." -tr1p1ea
Spoiler For some of the calcs I own:



(actually I have quite a few more than this, but I don't feel like making bars for them all.)

Offline Adriweb

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Re: TI-Nspire USB serial breakout boards
« Reply #28 on: December 12, 2014, 02:26:47 am »
Quote from: tangrs on December 12, 2014, 12:54:21 am
Does anyone have any more information on how the USB host port works? I did manage to find this but there aren't any concrete values...
I believe Excale had done some light testings initially but didn't get something working. But I guess you'd have to ask Critor or Excale directly, they are the one who tried things...
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Offline Vsod99

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Re: TI-Nspire USB serial breakout boards
« Reply #29 on: December 15, 2014, 02:35:03 pm »
Quote from: tangrs on December 08, 2014, 09:18:18 pm
A little late but the final prototype looks like this:





In the end, I decided that a clamp type design would work best since it fits like a adapter/plug rather than a whole case (it also cuts down on 3d printing time, complexity and material).

I will also release the STL files and dimensions of the PCB board so people can print or modify the 3d printed case to their own likings.
I want this. now.  >:(
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