[Diy_efi] Fast updating (20Hz) GPS receivers for track

[Hugh Keir]

Seems like the best way to link the GPS is with an IMU ( solid state gyros
+ accelerometer).

Here is racelogic's explanation of why this is so

http://www.racelogic.co.uk/_downloads/vbox/Application_Notes/IMU_Integration_Flyer.pdf

The model robot, helicopter and aeroplane guy's use these extensively,
there are quite a few projects on the NET showing the outputs and code
from IMU's

Really would love this for my race car.

> Found this 20Hz GPS module, it appears to be mass market so should be
> cheap.
>
> http://www.skytraq.com.tw/products/Venus638LPx_PB_v3.pdf
>
>
> ----- Original Message -----
> From: <steve at donegan.org>
> To: <diy_efi at diy-efi.org>; "Mike" <niche at iinet.net.au>
> Sent: Monday, July 25, 2011 7:29 PM
> Subject: Re: [Diy_efi] Fast updating (20Hz) GPS receivers for track
>
>
> Well, if you lived in Germany it would be like 15 Euro's out the door.
> However with shipping to the US that becomes 70+ Euro's. But still far
> cheaper than the original poster's 1000$+ for a 10 Hz GPS :-)
>
> I bought one anyway as I want to check it out with my navigation/rally
> software which needs more than 1 Hz updates.
>
> The URL for the place in Germany is:
> http://shop.trenz-electronic.de/catalog/product_info.php?cPath=105_139&products_id=744
> ____________
> Steven Donegan
> SSCC/NORC Car #86
> www.sscc.us
>
>
>
> --- On Mon, 7/25/11, Mike <niche at iinet.net.au> wrote:
>
>> From: Mike <niche at iinet.net.au>
>> Subject: Re: [Diy_efi] Fast updating (20Hz) GPS receivers for track
>> To: steve at donegan.org, diy_efi at diy-efi.org
>> Date: Monday, July 25, 2011, 6:10 PM
>> Gee its small, amazing what can be
>> done with fractal antennas,
>> I'm tempted to hang one off a cheapie netbook when I next
>> go country
>> as the gps in my son's HTC is a bit flakey and geotagging
>> doesnt work that well,
>> also give him a chance to maybe read from it in C++
>>
>> If you get one, let us know the overall price and how well
>> it works,
>>
>> Thanks
>>
>>
>> At 10:26 PM 7/25/2011, you wrote:
>> >I found this:
> http://www.gtop-tech.com/jsf/moduleproduct.jsf?muid=5a50acc3cd4f20749b345fe86e442ed78a6d204d&suid=d2aafd64c93952bb33c7ee066e322e597947063d&puid=881a56b7500af0dc8b4fe87bba293ff898b039d6
>> >
>> >It's a 10 Hz, non-interpolation, USB module. Seems
>> perfect for the original gentleman's uses although the only
>> place I find it available at present is a EU electronics
>> outfit.
>> >____________
>> >Steven Donegan
>> >SSCC/NORC Car #86
>> >www.sscc.us
>> >
>> >
>> >
>> >--- On Mon, 7/18/11, Avery Nisbet <anisbet at gmail.com>
>> wrote:
>> >
>> >> From: Avery Nisbet <anisbet at gmail.com>
>> >> Subject: Re: [Diy_efi] Fast updating (20Hz) GPS
>> receivers for track
>> >> To: steve at donegan.org
>> >> Cc: "Jay Rabe" <jayrabe at gmail.com>,
>> diy_efi at diy-efi.org
>> >> Date: Monday, July 18, 2011, 6:24 PM
>> >> Yup a max232 chip and antenna with an
>> >> SMA connector and it should be
>> >> good to go. LM7805 like 3.3v
>> regulator
>> >> would be needed too but those
>> >> are cheap.
>> >>
>> >>
>> >> It has configurable baud and sample speed so it
>> should hook
>> >> right up
>> >> to the motec after using a Max232 chip. It also
>> has two
>> >> serial ports I
>> >> assume they can both be configured as outputs so
>> you could
>> >> hook it up
>> >> to to DAQ's if you wanted to.
>> >>
>> >>
>> >> -Avery
>> >>
>> >> On Mon, Jul 18, 2011 at 11:17 AM, <steve at donegan.org>
>> >> wrote:
>> >> > That item looks good - mate it with a
>> USB/Serial
>> >> interface and it makes the acquisition side of a
>> system. Or
>> >> simply a level shifter serial interface as it
>> appears a 3.3V
>> >> interface is on that module.
>> >> > ____________
>> >> > Steven Donegan
>> >> > SSCC/NORC Car #86
>> >> > www.sscc.us
>> >> >
>> >> >
>> >> >
>> >> > --- On Mon, 7/18/11, Avery Nisbet <anisbet at gmail.com>
>> >> wrote:
>> >> >
>> >> >> From: Avery Nisbet <anisbet at gmail.com>
>> >> >> Subject: Re: [Diy_efi] Fast updating
>> (20Hz) GPS
>> >> receivers for track
>> >> >> To: "Jay Rabe" <jayrabe at gmail.com>
>> >> >> Cc: diy_efi at diy-efi.org
>> >> >> Date: Monday, July 18, 2011, 6:07 PM
>> >> >> I highly doubt its doing any
>> >> >> interpolation. It would be more
>> work
>> >> >> than actually doing the real thing.
>> >> >> If anything they may not truly giving 10
>> NMEA
>> >> sentences a
>> >> >> second.
>> >> >> Maybe 9.3 or 9.75 a second.
>> >> >>
>> >> >>
>> >> >> http://www.sparkfun.com/products/9133
>> >> >>
>> >> >> Sparkfun also did a good right up on what
>> to look
>> >> for and
>> >> >> what chips
>> >> >> they carry and how it all works.
>> >> >>
>> >> >> Look into what the chip in the module can
>> do.
>> >> Find
>> >> >> the data sheet
>> >> >> most are reconfigureable with some
>> resistors or by
>> >> sending
>> >> >> them some
>> >> >> commands.
>> >> >>
>> >> >>
>> >> >> -Avery
>> >> >>
>> >> >> 2011/7/16 Jay Rabe <jayrabe at gmail.com>:
>> >> >> > Im not sure if this is exactly what
>> you are
>> >> looking
>> >> >> for but it has some info
>> >> >> > on 5hz vs 10hz gps receivers.
>> >> >> > http://trackmaster.trackaroo.com/forums/-/message_boards/message/43468
>> >> >> > theres one post that says a bunch of
>> the
>> >> 10hz
>> >> >> receivers are really 5hz and
>> >> >> > interpolate to make them 10hz, no
>> idea the
>> >> validity of
>> >> >> that claim but might
>> >> >> > want to check it out quick before
>> you go nuts
>> >> hunting
>> >> >> a 20hz down. (maybe
>> >> >> > more interpolation bs or something
>> to look
>> >> out for.)
>> >> >> > The GPS receiver is
>> bluetooth that they're
>> >> talking
>> >> >> about,
>> >> >> > http://www.qstarz.com/GPS_products.htm
>> >> >> you might find some more info there.
>> >> >> >
>> >> >> > On Sat, Jul 16, 2011 at 1:20 PM,
>> Brian Koontz
>> >> <brian at pongonova.net>
>> >> >> wrote:
>> >> >> >>
>> >> >> >> On Sat, Jul 16, 2011 at
>> 11:08:03AM -0700,
>> >> steve at donegan.org
>> >> >> wrote:
>> >> >> >> > Been googling for GPS
>> modules this
>> >> morning
>> >> >> and the fastest I've
>> >> >> >> > found so far is a 5Hz
>> refresh. If
>> >> anyone else
>> >> >> finds something better
>> >> >> >> > (module, not system) let me
>> know.
>> >> >> >>
>> >> >> >> 10Hz, $40:
>> >> >> >>
>> >> >> >>
>> >> >> >> http://www.thaieasyelec.net/index.php/GPS/65-Channel-SUP500F-10Hz-GPS-Receiver-with-Smart-Antenna/p_145.html
>> >> >> >>
>> >> _______________________________________________
>> >> >> >> Diy_efi mailing list
>> >> >> >> Diy_efi at diy-efi.org
>> >> >> >> http://lists.diy-efi.org/mailman/listinfo/diy_efi
>> >> >> >
>> >> >> >
>> >> >> >
>> >> _______________________________________________
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>> >> >> >
>> >> >> >
>> >> >>
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>> >> >
>> >>
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