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Digital speedometer for cars using arduino

Discussion in 'Microcontrollers, Programming and IoT' started by bobdxcool, Feb 3, 2013.

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  1. bobdxcool

    bobdxcool

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    Mar 9, 2012
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    11,513
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    Nov 17, 2011
    Bob:
    1) please don't double post. I deleted the other thread.
    2) the link is not working (I get "+ '/']); } return o.doit; }; "
    3) a reed switch will not last very long. A hall sensor, since it has no mechanically actuated parts, will last much longer, Make your choice...
     
  3. bobdxcool

    bobdxcool

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    Mar 9, 2012

    Sir, but will hall effect switches produce pulses like reed switches ??

    This is the code for reed switch based on pulses for arduino


     
    Last edited: Feb 3, 2013
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,496
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    Jan 21, 2010
    Yes, many hall sensors will produce a digital signal. You need to look at the specifications for them (which will include example circuits) to determine which one to use and how to connect it.

    You should start your search by looking for hall effect sensors with digital outputs (those with analogue outputs are unlikely to be useful for you)
     
  5. bobdxcool

    bobdxcool

    98
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    Mar 9, 2012
    I think this one --ss 441 will do

    http://pdf1.alldatasheet.com/datasheet-pdf/view/473140/SECELECTRONICS/SS441.html

    Am I right sir?
     
  6. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    Yes, that one loooks loike it can be used for your purpose.
     
  7. bobdxcool

    bobdxcool

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    Mar 9, 2012
    Can you please suggest a gsm module and gps module for an arduino board??
    Cheap and best.

    Is a MAX232 chip required ? if yes, how to connect??

    I will basically be using to get data from gps to arduino and send that data over a gsm module to a mobile phone for further processing.
     
  8. Harald Kapp

    Harald Kapp Moderator Moderator

    11,513
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    Nov 17, 2011
    Sorry, that's not my league.
     
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