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Feasability of a Project — Parallax Forums

Feasability of a Project

m_fabio2m_fabio2 Posts: 49
edited 2005-08-12 03:25 in General Discussion
Quick question about a project.

What I want to do is make a GPS beacon for my truck. I want to attach a GPS module to a Stamp, which will then send the coordinates to a transmitter. A second handheld module which will include a stamp, reciever, GPS and LCD display will then compare the truck location to the module location (Module being a hand-held so you can carry) and display the direction to the truck on the LCD screen.

Question I have for all you heavy programmers out there, how intensive does this sound programming wise ? I'm estimating about $300 in parts and work (Including finished boards).
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Comments

  • BeanBean Posts: 8,129
    edited 2005-08-11 13:11
    Sounds do-able to me.
    Cool project too.
    Bean.

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    Product web site: www.sxvm.com

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    ·
  • Robert KubichekRobert Kubichek Posts: 343
    edited 2005-08-11 15:03
    m_fabio2 said...
    Quick question about a project.


    What I want to do is make a GPS beacon for my truck. I want to attach a GPS module to a Stamp, which will then send the coordinates to a transmitter. A second handheld module which will include a stamp, reciever, GPS and LCD display will then compare the truck location to the module location (Module being a hand-held so you can carry) and display the direction to the truck on the LCD screen.



    Question I have for all you heavy programmers out there, how intensive does this sound programming wise ? I'm estimating about $300 in parts and work (Including finished boards).

    Sounds a lot like Ham Radio APRS, do a search for APRS, and there is a ton of info out there plus a lot of hardware and code examples.

    Bob N9LVU scool.gif
  • YanroyYanroy Posts: 96
    edited 2005-08-11 15:08
    Well, from my experience, here's what you're looking at:

    GPS modules: 2 x $100 = $200

    Stamps: 2x $50 = $100

    Radio: 2x $100 = $200 (I'm assuming you need something with more than 200ft range, so that's why this may seem expensive)

    LCD: $4 for parallel, $50 for serial... take your pick

    That adds up to about $550.· As for actually connecting those pieces of hardware together, that should be relatively easy.
  • cbmeekscbmeeks Posts: 634
    edited 2005-08-11 15:15
    Yanroy said...
    Well, from my experience, here's what you're looking at:

    GPS modules: 2 x $100 = $200

    Stamps: 2x $50 = $100

    Radio: 2x $100 = $200 (I'm assuming you need something with more than 200ft range, so that's why this may seem expensive)

    LCD: $4 for parallel, $50 for serial... take your pick


    That adds up to about $550. As for actually connecting those pieces of hardware together, that should be relatively easy.


    GPS modules: 2 x $100 = $200

    Stamps: 2x $50 = $100

    Radio: 2x $100 = $200 (I'm assuming you need something with more than 200ft range, so that's why this may seem expensive)

    LCD: $4 for parallel, $50 for serial... take your pick

    Hooking it all up and realizing you're a nerd with a really cool truck....priceless.

    hehehe...sorry, couldn't resist.

    cbmeeks

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  • Robert KubichekRobert Kubichek Posts: 343
    edited 2005-08-11 15:31
    I have found GPS modules for less than $50 each.
    Also don't forget the GPS antenna "amplified costs more" or " non-amplified, easy to make and lower cost).
    A powered antenna is definitly the way to go!
    Stamp cost depends on which stamp you use.
    The tradeoff is the stamp display combo, parrallel/serial cost of each combination.
    The radio(s) are another tradeoff, as you only need a "transmitter" for the vehicle, and "reciever" for the handheld data terminal.
    You MIGHT look into FMRS/GMRS handhelds to lower the cost.
    I have picked up a pair of GE's for under $20 a the local WalMart on sale in the redtag area, they work fine for about 1 mile...

    Bob N9LVU
    scool.gif
  • m_fabio2m_fabio2 Posts: 49
    edited 2005-08-11 15:33
    Well I have some of the parts already, I have about 4 stamps sitting around (People burned out the regulator in them, so if I buy a cheap regulator I can use them by putting 5V in).

    As far as the RF transmitter, anyone know a good place to buy a FM transmitter with a decent range (1-2 miles). Everything I have found is around 200ft max. Won't make much sense to make this project if I can see the truck..
  • BeanBean Posts: 8,129
    edited 2005-08-11 16:49
    Is this so you can find the truck after YOU park it ? If so then just have a button on the module that you can push when your at the truck and the module can remember the trucks location. Then you only need 1 GPS and zero radios.
    Bean.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    "SX-Video·Module" Now available from Parallax for only $28.95

    http://www.parallax.com/detail.asp?product_id=30012

    Product web site: www.sxvm.com

    "One experiment is worth a thousand theories"
    ·
  • OakGraphicsOakGraphics Posts: 202
    edited 2005-08-11 16:56
    Sounds like he wants to be able to track his truck once his teenager sneeks out of the house with the keys and drives off with it.
    smile.gif
  • m_fabio2m_fabio2 Posts: 49
    edited 2005-08-11 16:59
    Not exactly for when I park it. A friend of mine car was stolen about 2 weeks ago, and it ended up being about 2 miles away after everything was said and done.
    I thought if we had a module like that we could have located the car, instead of waiting for 2 weeks. I just want to see the feasability of such as project.

    Maybe in design I could play around with two transievers, and have the hand held module send a enable signal, or something of that sort.
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-08-11 17:18
    I know this isn't as much fun, and certainly doesn't have the geek coolness factor, but what about LoJack or OnStar? While you have to subscribe the service (meaning over time it will cost more), you'll have a nationwide recovery range, plus with OnStar additional services such as accident detection, lockout protection, etc. My gf's sarcastic nickname for me is "Captain Obvious", but I believe sometimes stating the obvious is required.

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  • steve_bsteve_b Posts: 1,563
    edited 2005-08-11 17:27
    APRS is an existing system set up (Amateur Packed Radio System...I think!! haha).
    If your truck is far enough away, you will need a good size transmitter in there for you to pick it up.
    Now, with APRS (or is it ARPS??) you have one radio with a gps that is constantly transmitting out to amateur radio repeaters and such.
    You just have a system at home that's tied in to the APRS network and a bit of software and you get a cheezy looking map but the capability to see where your truck would be.
    The Caviat here is that you need a HAM license to use the radio bands. The Basic license is pretty easy....it's all block diagram circuits and multiple choice questions (up here in canada anyhow).

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    Steve

    "Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."
  • Robert KubichekRobert Kubichek Posts: 343
    edited 2005-08-11 18:07
    APRS: Automatic Position Reporting System

    You have to be a Ham to use the Ham frequencies.
    The same type of system can run on any frequency.

    Bob N9LVU

    scool.gif
  • steve_bsteve_b Posts: 1,563
    edited 2005-08-11 23:07
    but does APRS run on anything other than HAM bands?

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    ·

    Steve

    "Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."
  • Robert KubichekRobert Kubichek Posts: 343
    edited 2005-08-11 23:15
    It can, there are several bands that require no liscensing, all it is is the sending of ascii data strings... Several trucking companies use it, so does the government... It is not a new technology, the cost to implement it has been lowered so much, just about anyone can do it.

    Bob N9LVU

    scool.gif
  • steve_bsteve_b Posts: 1,563
    edited 2005-08-11 23:58
    but to do it on an "open" band means issues with interference.
    Those little FRS radio's are very useful....and everyone knows this....which is why the channels are pretty congested (as a trip to disney proved last year).

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    ·

    Steve

    "Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."
  • Robert KubichekRobert Kubichek Posts: 343
    edited 2005-08-12 00:19
    True, but there are more open bands than FRS, and to liscence for some of the more commecrcial bands like GMRS is easy.....
    There are many options available....

    Bob N9LVU

    scool.gif
  • OrionOrion Posts: 236
    edited 2005-08-12 03:25
    Why bother? Cheap cellular modems are available that will give you near world wide converge. Look into SMS modems.· These are built for low power /· long distance apps.
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