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asic1984
Joined: 15 Nov 2003
Posts: 266
Helped: 3
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 18 Aug 2004 0:55 digital compass? |
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| tags: digital compass ic compass schematic digital compass schematic |
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hi all
where can i find the schematic of digital compass
thanks for help
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Elavionic
Joined: 06 Apr 2002
Posts: 91
Helped: 1
Location: Portugal
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| 24 Aug 2004 20:11 Re: digital compass? |
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Search phillips site. They have an IC for compass, i believe that the part number is KMZ51 . But itsn't easy to build one, you need tho interface the Ic with a µC, just buy one already assembled for use. See at http://www.robot-electronics.co.uk/shop/Compass_CMPS032004.htm.
And they have many others modules for robotics.
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hill
Joined: 17 Jun 2004
Posts: 285
Helped: 9
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| 25 Aug 2004 2:54 digital compass? |
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| Search also the Circuit Celler Magazine. I think there is an artical about that. It's some issues back in this year.
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FoxyRick
Joined: 09 Jan 2004
Posts: 597
Helped: 35
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| 25 Aug 2004 9:52 Re: digital compass? |
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| tags: compass schematic pewatron 6945 |
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Compass schematics seem hard to find. Elektor have a simple project for a Lego RCX in the May 2002 issue - I've attached it here. It uses a Pewatron type 6945 compass sensor.
You may find more information in the manufactures datasheets here:
http://www.pewatron.com/GB/default.htm
Cheers,
FoxyRick.
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aslm
Joined: 03 May 2002
Posts: 124
Helped: 5
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| 29 Aug 2004 14:49 Re: digital compass? |
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| tags: compass schematic |
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I have been searching for information about this aslo. My result is that the sensor to use is the KMZ51 from philips (got 3 of them already) There are also simular sensors and a lot of theoretical info from Honywell but they are much more expensive and harder to buy.
As I understand there are two ways of bulding a compas, the simpel way with two sensor and always keep the unit in upright position, the oter variant is using 3 magnetics sensors and do a tilt compensation with a two axis gyro of some sort. The last solution would be rather complicated, and where to get gyros thet dont cost 100s of $?
Some links with information i found after much searching...
KMZ51 for lego robots, with simple schematics:
http://www.convict.lu/Jeunes/CompassSensor.htm
Possible source of gyros but how to buy?
http://www.vti.fi/en/index.html
Some schematics, but nothing compleat.
http://magnetometer.captain.at/
At las I also attache two schematics for KMZ51 that I found on the net somwhere, cant remember where.
If someone has more info or hands on experience, please comment...
regards Me
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SPATAN
Joined: 17 Aug 2004
Posts: 135
Helped: 5
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| 03 Sep 2004 9:40 Re: digital compass? |
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Try this link it used pic cotroller
http://users.skynet.be/bk317494/
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brmadhukar
Joined: 21 Jun 2002
Posts: 844
Helped: 29
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| 03 Sep 2004 9:46 Re: digital compass? |
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Hi,
Some of the GPS recievers have this integrated with the handheld module.
B R M
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samsuffy
Joined: 23 Jul 2002
Posts: 79
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| 30 Dec 2004 20:38 Re: digital compass? |
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Hi aslm
| Quote: |
| My result is that the sensor to use is the KMZ51 from philips (got 3 of them already) |
How did you get them ?... samples ?
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aslm
Joined: 03 May 2002
Posts: 124
Helped: 5
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| 04 Jan 2005 1:37 Re: digital compass? |
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KMZ51 can be order from ELFA (www.elfa.se) witch is a electronics supplier of northern europe. A bit expensive tho, 7,34 euro...
I dont know to what contrys the ship to (only tried sweden) but I know the now have resellers in several european contrys.
re Me
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sajal1975
Joined: 25 Mar 2005
Posts: 121
Helped: 3
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| 18 Apr 2005 14:30 Re: digital compass? |
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hi,
u can find useful data at
| Moderation: |
| link provided by you is not working so removed |
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grsr
Joined: 30 May 2007
Posts: 2
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| 21 Jun 2007 20:28 Re: digital compass? |
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any can write simple code for kmz51 ????
i can't drive copens coil and filip coil
can you help me ?????
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MichelM
Joined: 26 Aug 2004
Posts: 20
Helped: 3
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| 22 Jun 2007 7:05 Re: digital compass? |
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| tags: digital compass ic |
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hello
Microchip has a application note
AN996, Designing a Digital Compass Using the PIC18F2520
h**p://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1824&appnote=en024198
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auto_mitch
Joined: 14 Oct 2004
Posts: 210
Helped: 20
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| 22 Jun 2007 8:05 Re: digital compass? |
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Electronic Compass Design
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ediamondsrt
Joined: 03 May 2007
Posts: 9
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| 22 Jun 2007 8:38 Re: digital compass? |
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can anyone provide a pdf file for this circuitrywhich covers all data?
in above file datasheet is not included from here i can got that
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coshkun
Joined: 27 Aug 2005
Posts: 149
Helped: 8
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| 28 Jun 2007 9:42 Re: digital compass? |
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| Calibration is another tough issue i think.What do you think about this?
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watermelon
Joined: 08 May 2007
Posts: 76
Helped: 8
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| 01 Jul 2007 17:57 Re: digital compass? |
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| tags: geotech.thunting.com |
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Use a circular fluxgate or two (may be three) orthogonal straight fluxgates.
You will get 2D/3D vectors for the magnetic field.
Search internet for fluxgate compasses. Fluxgate sensors can be home brewed.
I remember Practical Electronics had one design of home made Fluxgate compass in '70 or '80s.
Also, check
http//geotech.thunting.com/pages/mag/projects/fmx1/fmx1.pdf
http//geotech.thunting.com/pages/mag/projects/cheeseman/cheeseman_mag1_150.pdf
http//geotech.thunting.com/pages/mag/projects/cheeseman/cheeseman_mag2_150.pdf
http//en.wikipedia.org/wiki/Fluxgate_compass
http//crocus.physics.mcmaster.ca/Magnetometer/TW/
http//www.freepatentsonline.com/5165269.html
[size=9][color=#999999]Added after 2 minutes:[/color][/size]
And also check the related patents at
http://geotech.thunting.com/cgi-bin/pages/common/index.pl?page=mag&file=patents.dat
There may be more patents, you can check on USPTO and espacenet.
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Strange
Joined: 25 May 2008
Posts: 7
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| 09 Sep 2008 3:21 digital compass? |
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hi
any body find useful and copletly result ?
plz send me strange_eca(at)yahoo.com
tanks
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