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Thread: range finding

  1. #11
    Member Advanced User
    Join Date
    Sep 2004
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    Ahmedabad/India
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    64

    Default

    HI ice ,

    Well to give u a circuit it will take a day or two , actually the given system has other basic flaw as they are using wrong value of components to lock the PLL at the desired freq. check out the formula and put the value,actually u don't need a PLL to work there .The modules are tightly tuned at a freeq of 38-42 Khz band so they do the filtering by themselves.
    There is no need for that PLL part.

    Thanks and regards
    -
    Pulkit

  2. #12
    Senior Member T-1000
    Join Date
    Jun 2004
    Location
    Bombay/Mumbai
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    498

    Default

    the modules i bought had no ratings on them...but i think ur right..they were made for the 40Khz freq..They are from murata.

    i don't think the circuit would have worked without the PLL.The PLl vaues are designed for a 40Khz detection freq.
    I myself was transmitiing a 40Khz tuned Ping.

    Without the ratings [transducer],thePLL was the safest way to go

    bye,
    ice
    //gerry

  3. #13

    Default

    Quote Originally Posted by mexx
    hiii pulkit

    do u think those GP2DI2 distance measuring sensors are available here in india??if so do let us know ..where and how to get those!!
    I brought 2 nos. of GP2D12 from Acroname. It cost me < Rs.1500/- including shipping. ($11.5x2 + $7 for shipping) I asked them to send it through normal airmail parcel, as it's the cheapest of all. It took abt 4weeks for the stuff to reach here.

    REgds

    happy_99

  4. #14
    Senior Member T-1000
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    Jun 2004
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    Default

    I did some searching,u don't need a PLL if the moduls are tuned to the same frequency.Just the pream and the amp
    bye,
    ice
    //gerry

  5. #15

    Default

    hi,
    can u give me the address where u got the sensors? can u tell me in a bit detail? any site etc offering the info...
    Subhasis Behera
    http://subhasis6.tripod.com
    If you are not living on the EDGE, then you are wasting space...

  6. #16

    Default

    hi,
    can u give me the address where u got the sensors? can u tell me in a bit detail? any site etc offering the info...
    Subhasis Behera
    http://subhasis6.tripod.com
    If you are not living on the EDGE, then you are wasting space...

  7. #17

    Default

    Quote Originally Posted by ingenium
    hi,
    can u give me the address where u got the sensors? can u tell me in a bit detail? any site etc offering the info...
    Check here

    www.acroname.com
    Email: sales@acroname.com

    Part: Sharp GP2D12 IR Ranging Sensor

    The sensor uses IR rays to determine the range to the object. Output is anlogue voltage proportional to the distance. Range is from 10cm-80cm for the above mentioned part.

    Regds

    happy_99

  8. #18

    Default gp2dxx sensor

    Hey can you give me the url from where you ordered this sensor in rs.1500.

  9. #19
    Senior Member T-1000
    Join Date
    Jun 2004
    Location
    Bombay/Mumbai
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    498

    Default

    Here
    http://www.acroname.com/robotics/parts/R48-IR12.html

    If you are buying from these guys,you would like to order in bulk,ask the forum if anyone needs these sensors.

    They sometimes give educational discounts and also when buying in bulk.

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