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Discussion Starter #1
I'm planning an all-digital dashboard using a touchscreen LCD.
I recall there was some discussion about this in the past.
The idea is to replace an analog controls with a single touch interface.
New cars seem to be going this route as well.

It looks to me that way to go is use an Android-based tablet PC.
I looked at using a micro and touch screen displays, and they are expensive just for the dang display. An entire tablet PC is cheaper. I have a $100 unit ordered.

In any case, creating the display interface software is possible with Android using emulators that is independant of the hardware.

Is there any open-source project already doing this?

The hard part is getting the sensor and control I/O to/from the tablet.
They all seem to have WiFi, so perhaps creating a CAN-bus to Wifi gateway unit is the solution? If someone can suggest another venue for this discussion, please advise.

Jack Murray
Nimble Motorsports

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Discussion Starter #2
One possibility might be to use a data logger as an interface to the display.
There are loggers out there that can make measurements from different types
of sensors and provide an ascii output for the display.I think the interface
to the display would be much less difficult. A logger could be thought of
as the interface between analog measurements and a digital display.
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Discussion Starter #3
The fact that you have no data input may be a bit of a stumbling block.

As for LCDs in the sun, many new cars ship with them; my guess is that they
can survive. There is another (non-EV) culture surrounding this sort of
thing. Check out mp3car.com. They have a discussion forum and a store for
all things pertaining to computers in cars, including exactly what you
describe (a digital dash).

A 7 inch touchscreen LCD is about $250. Computers are almost that much again
(consider a Fit2PC <http://www.fit-pc.com/web/> which draws very little
power). Consider
RideRunner<http://guino.home.insightbb.com/roadrunner.html> (fully
customizable) and
RRFusion<http://www.fusioncontrolcentre.com/FusionStore/catalog/news.php>for
a way to read analog voltages.

cheers,



--
Dave
http://evalbum.com/2500
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Discussion Starter #4
It's expensive because it's name brand and uses WiFi. Try finding a chinese
knockoff that uses bluetooth and you'll see that you can get one for well
under $100. Of course, this requires that you use something which has
bluetooth.

I'm a fan of the Android operating system. Some of the cheaper Android
tablets have BT but a lot of them do not. Also, you need a tablet that comes
with Android >= 2.0 in order to use bluetooth properly. It *is* possible to
find an Android tablet with 2.1 and bluetooth for between $200-300. Price
can be a huge advantage that android has over the iPad.

Jack Murray <[email protected]>wrote:

> I haven't been to mp3car.com in a while, thanks for the reference, will
> probably go over there to discuss my project.
> There is a CAN->Wifi device in there store,
>
>
> http://store.mp3car.com/OBDLink_Multiprotocol_OBD_II_by_ScanTool_WIFI_Mode_p/com-120.htm
>
> Not sure if its only can->wifi, or can do wifi->can, but it costs more than
> the tablet at almost $200 in any case. Generally I avoid software I can't
> modify, too frustrating.
>
> A cheap tablet might be junk and not last, but then an expensive one might
> be just the same too! My design is to shield it from the sun quite well,
> embedding it so the driver can only see it really. This is for my Midget,
> which isn't an EV, but will use the work for other projects too.
> Getting interior airflow when sitting is a good idea for all cars.
>
> Jack Murray
> Nimble Motorsports
>
> --- On Mon, 11/29/10, Dave Hale <[email protected]> wrote:
>
> > From: Dave Hale <[email protected]>
> > Subject: Re: [EVDL] car dashboard lcd
> > To: "Electric Vehicle Discussion List" <[email protected]>
> > Date: Monday, November 29, 2010, 7:42 AM
> > The fact that you have no data input
> > may be a bit of a stumbling block.
> >
> > As for LCDs in the sun, many new cars ship with them; my
> > guess is that they
> > can survive. There is another (non-EV) culture surrounding
> > this sort of
> > thing. Check out mp3car.com. They have a discussion forum
> > and a store for
> > all things pertaining to computers in cars, including
> > exactly what you
> > describe (a digital dash).
> >
> > A 7 inch touchscreen LCD is about $250. Computers are
> > almost that much again
> > (consider a Fit2PC <http://www.fit-pc.com/web/> which
> > draws very little
> > power). Consider
> > RideRunner<http://guino.home.insightbb.com/roadrunner.html>
> > (fully
> > customizable) and
> > RRFusion<http://www.fusioncontrolcentre.com/FusionStore/catalog/news.php
> >for
> > a way to read analog voltages.
> >
> > cheers,
> >
> >
> >
> > --
> > Dave
> > http://evalbum.com/2500
> > -------------- next part --------------
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> >
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> > only.
> > | Multiple-address or CCed messages may be rejected.
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> >
>
> _______________________________________________
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Discussion Starter #5
And just another note, that Dealextreme device has an ELM327 chipset in it.

Datasheet here:
http://www.elmelectronics.com/DSheets/ELM327DSF.pdf

Which means it can be configured for a number of CAN implementations,
including a user defined set.

read page 19.

Just ordered 2 of them, can't wait to get it and test with a curtis
controller. Hope it works.


Travis Gintz <[email protected]> wrote:

> the problem with some OBDII devices, is that they sometimes block all NON
> OBDII communication strings. i.e. they only pass the ones relevant to the
> OBD spec.
>
> That one you linked to does actually state that it does canbus as well, not
> JUST canbus, so that is something we'd need to look out for.
>
> On Mon, Nov 29, 2010 at 11:42 AM, Childress, Matthew <
> [email protected]> wrote:
>
>> There's a ~$50 ODBII -> Bluetooth dongle here:
>> http://www.dealextreme.com/details.dx/sku.16921
>>
>> Then link it up to your favorite Android Bluetooth-capable smart phone
>> or 7" tablet such as the Samsung Galaxy. If you paid for the phone to
>> be online, you could even get state of charge while charging (or if
>> there was free open wireless access, use that instead) if you make it
>> available on the CANBUS. An application like Torque
>> http://torque-bhp.com is cheap and relatively inexpensive and is setup
>> to log to a webserver. I've been digging around for open-source apps,
>> but haven't seen any. The benefit of Android is you could start
>> development on a cheap cast-off cell phone and then it would port over
>> to a 7" tablet once you located it. Plus the wireless and Bluetooth is
>> built-in.
>>
>> If you're really cheap, then you could hunt for Android-based phones
>> that work just fine but people upgraded to the latest. Fortunately if
>> this is your business plan then this happens quite quickly. Sadly it's
>> highly wasteful www.thestoryofstuff.com
>>
>> [email protected]
>>
>> -----Original Message-----
>> From: [email protected] [mailto:[email protected]] On
>> Behalf Of Jack Murray
>> Sent: Monday, November 29, 2010 12:27 PM
>> To: Electric Vehicle Discussion List
>> Subject: Re: [EVDL] car dashboard lcd
>>
>> I haven't been to mp3car.com in a while, thanks for the reference, will
>> probably go over there to discuss my project.
>> There is a CAN->Wifi device in there store,
>>
>> http://store.mp3car.com/OBDLink_Multiprotocol_OBD_II_by_ScanTool_WIFI_Mo
>> de_p/com-120.htm
>>
>> Not sure if its only can->wifi, or can do wifi->can, but it costs more
>> than the tablet at almost $200 in any case. Generally I avoid software
>> I can't modify, too frustrating.
>>
>> A cheap tablet might be junk and not last, but then an expensive one
>> might be just the same too! My design is to shield it from the sun
>> quite well, embedding it so the driver can only see it really. This is
>> for my Midget, which isn't an EV, but will use the work for other
>> projects too.
>> Getting interior airflow when sitting is a good idea for all cars.
>>
>> Jack Murray
>> Nimble Motorsports
>>
>> --- On Mon, 11/29/10, Dave Hale <[email protected]> wrote:
>>
>> > From: Dave Hale <[email protected]>
>> > Subject: Re: [EVDL] car dashboard lcd
>> > To: "Electric Vehicle Discussion List" <[email protected]>
>> > Date: Monday, November 29, 2010, 7:42 AM
>> > The fact that you have no data input
>> > may be a bit of a stumbling block.
>> >
>> > As for LCDs in the sun, many new cars ship with them; my
>> > guess is that they
>> > can survive. There is another (non-EV) culture surrounding
>> > this sort of
>> > thing. Check out mp3car.com. They have a discussion forum
>> > and a store for
>> > all things pertaining to computers in cars, including
>> > exactly what you
>> > describe (a digital dash).
>> >
>> > A 7 inch touchscreen LCD is about $250. Computers are
>> > almost that much again
>> > (consider a Fit2PC <http://www.fit-pc.com/web/> which
>> > draws very little
>> > power). Consider
>> > RideRunner<http://guino.home.insightbb.com/roadrunner.html>
>> > (fully
>> > customizable) and
>> >
>> RRFusion<http://www.fusioncontrolcentre.com/FusionStore/catalog/news.php
>> >for
>> > a way to read analog voltages.
>> >
>> > cheers,
>> >
>> >
>> >
>> > --
>> > Dave
>> > http://evalbum.com/2500
>> > -------------- next part --------------
>> > An HTML attachment was scrubbed...
>> > URL:
>> http://lists.sjsu.edu/mailman/private/ev/attachments/20101129/98f1d675/a
>> ttachment.html
>> >
>> > _______________________________________________
>> > | REPLYING: address your message to [email protected]
>> > only.
>> > | Multiple-address or CCed messages may be rejected.
>> > | UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
>> > | OTHER HELP: http://evdl.org/help/
>> > | OPTIONS: http://lists.sjsu.edu/mailman/listinfo/ev
>> >
>>
>> _______________________________________________
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>>
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>>
>
>
>
> --
> Travis Gintz
>
>


--
Travis Gintz
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