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05-06-2005, 05:12 PM
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#1
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Raw Wave
Join Date: Oct 2003
Location: Madrid
Posts: 1,982
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Ublox module , Nearly there!
Ok, I just bought the Ublox SBR-LS module plus the Murata gyro and ANN-MS active antenna. (Thanks to hklomann)
The connections for the module are as follows: (image 3)
Now I need help to get this working!
The gyro connects straight to the module( image 1)...and doesn't apparently require any calibration( image 2). Then I need to find the speed pulse in my Jeep. Connect all this together & I have a dead reckoning GPS system! Sounds easy, I know! 
I guess I need..
1, to build some sort of daughter board that connects to the module which will holds the gyro and a back-up battery.
2, to find a speed pulse somewhere behind the dash.
Anybody already doing this?
Last edited by Laidback; 06-09-2005 at 04:00 PM.
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05-07-2005, 03:29 PM
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#2
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Raw Wave
Join Date: Oct 2003
Location: Madrid
Posts: 1,982
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05-09-2005, 03:52 PM
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#3
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MySQL Error
Join Date: May 2003
Location: Miami, FL
Posts: 4,347
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I was just getting ready to order the module.
You are also going to need a rs232 level converter on your daughterboard, get the max233cpe as it does not require any external caps. As the gps module only outputs TTL logic, which your serial port will not like
And yes your going to need to find the wire that is called VSS. From what i've seen you can tap it directly from your ECU.
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05-09-2005, 06:43 PM
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#4
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MySQL Error
Join Date: Mar 2004
Location: Bristol
Posts: 13,521
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Damn you laidback! JCDillin and I are working onmt he u-blox! 
__________________
If you want more answers on anything I have posted you can find me at digital-car.co.uk
or skiing or diving or doing somthing else fun!
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05-10-2005, 09:09 AM
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#5
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Raw Wave
Join Date: Oct 2003
Location: Madrid
Posts: 1,982
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Quote: Originally Posted by Scouse Monkey
Damn you laidback! JCDillin and I are working onmt he u-blox!
Good, I need all the help I can get! I've never made a daughterboard before What's the easiest way to go about it?
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05-10-2005, 09:21 AM
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#6
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MySQL Error
Join Date: May 2003
Location: Miami, FL
Posts: 4,347
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Honestly, if your not setup to make circuit boards, I would just make it on a piece of perfboard, it really isnt going to be that much wiring, all your going to have is power gyro and the rs232 converter.
Then you can just use a ribbon cable to connect the 2 boards together.
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05-10-2005, 11:33 AM
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#7
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MySQL Error
Join Date: Mar 2004
Location: Bristol
Posts: 13,521
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yeah i would just make a new board with all the connections you need on and then link the two with a ribbon cable. You make the new board the same size with corner holes and mount it above or below with spacers inbetween. I intend to mount the gyro near the centre of mass of my car so i might mount it remotely.
__________________
If you want more answers on anything I have posted you can find me at digital-car.co.uk
or skiing or diving or doing somthing else fun!
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05-11-2005, 07:50 AM
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#8
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Raw Wave
Join Date: Oct 2003
Location: Madrid
Posts: 1,982
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Hmmm, gyro placement. Does it need to be in the centre of the car? Is higher up better than lower down? Anybody know where they put them in the cars that have them built in?
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05-11-2005, 10:59 AM
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#9
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Raw Wave
Join Date: Sep 2004
Location: São Paulo, Brazil
Posts: 3,534
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I dont think the gyro placement will make a diffrence from what I have seen form ublox... as long as you keep it in its correct orientation...
I was looking at the ublox a few weeks ago... they have a ready-to-go package with deadreckoning, antenna, everything with rs-232 output ready for the pc... but for the whopping price of a mere $1500 I didnt think it would have much future in the carpc realm...  For now I'm going with a garmin oem module system... hope it works out well enough
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05-11-2005, 11:37 AM
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#10
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MySQL Error
Join Date: Mar 2004
Location: Bristol
Posts: 13,521
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yeah a car is so small it shouldnt make any difference but i am a perfectionist! 
__________________
If you want more answers on anything I have posted you can find me at digital-car.co.uk
or skiing or diving or doing somthing else fun!
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05-11-2005, 12:03 PM
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#11
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MySQL Error
Join Date: May 2003
Location: Miami, FL
Posts: 4,347
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mine is going to be in my trunk with the computer, so hopefully it will have good results there.
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05-12-2005, 07:08 AM
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#12
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Raw Wave
Join Date: Oct 2003
Location: Madrid
Posts: 1,982
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Where can I get the MAX233cpe from? My local shop only has MAX233cpp type. I take it that these won't do? Also they don't have 20 pin connectors at 2mm pitch either 
Edit: Ok, MAX233cpe @ RS. Still looking for connectors and/or cable
Last edited by Laidback; 05-12-2005 at 08:51 AM.
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05-12-2005, 12:08 PM
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#13
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MySQL Error
Join Date: May 2003
Location: Miami, FL
Posts: 4,347
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you can get the max233cpe free from maxim, I was able to get 2 free of charge as samples
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05-12-2005, 12:11 PM
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#14
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MySQL Error
Join Date: Mar 2004
Location: Bristol
Posts: 13,521
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yeah i used to get loads of free stuff from maximw hen i was a kid. all kinds of dc-dc converters for little projects.
__________________
If you want more answers on anything I have posted you can find me at digital-car.co.uk
or skiing or diving or doing somthing else fun!
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05-12-2005, 02:39 PM
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#15
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Raw Wave
Join Date: Oct 2003
Location: Madrid
Posts: 1,982
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Quote: Originally Posted by jcdillin
you can get the max233cpe free from maxim, I was able to get 2 free of charge as samples
Maxim samples gives me the choice of cpp or epp 
Last edited by Laidback; 06-07-2005 at 02:18 AM.
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