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SRF08 Problems — Parallax Forums

SRF08 Problems

Slash TantrumSlash Tantrum Posts: 6
edited 2005-02-25 17:43 in BASIC Stamp
Hi, I got a SRF08 recently and was wondering how to connect it to my Basic Stamp 2 properly.· I read the nuts and volts article about it, but upon connecting everything, exactly as shown, It didnt work... at all.· I haven't found any other useful information anywhere else either.

Post Edited (Slash Tantrum) : 2/22/2005 9:46:43 PM GMT

Comments

  • Beau SchwabeBeau Schwabe Posts: 6,557
    edited 2005-02-22 21:11
    When I did a Google search for "SRF08" I found tons of information.
    you said...
    I haven't found any other useful information anywhere else either

    ...Perhaps you did a search for "(No Subject)" resulting
    in your not so useful findings.

    http://www.robot-electronics.co.uk/htm/srf08stamp.shtml
    http://www.acroname.com/robotics/info/examples/srf04-1/srf04-1.html
    http://www.superdroidrobots.com/product_info/SRF08.htm
    http://www.totalrobots.com/examples/example43.htm

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Beau Schwabe - Mask Designer III

    National Semiconductor Corporation
    (Communication Interface Division)
    500 Pinnacle Court, Suite 525
    Mail Stop GA1
    Norcross,GA 30071

    Post Edited (Beau Schwabe) : 2/22/2005 9:21:25 PM GMT
  • Slash TantrumSlash Tantrum Posts: 6
    edited 2005-02-22 21:51
    Hah! I forgot to put in a subject! I've looked at most of those and haven't found them very helpful. I'll look at the one that I haven't though. Basicly what I meant by the question was: Does anyone know of a configuration that definately works? Like one they have tried or seen used?
  • Beau SchwabeBeau Schwabe Posts: 6,557
    edited 2005-02-22 22:17
    I'm not sure if this approach would work for you, but years ago I setup a test configuration where
    the ultrasonic transmitter was sending a constant 40kHz.... i.e. There was no 'PING'


    On the receiver test side I connected a scope, and visually I was able to process what I was seeing
    on the scope based on where I was pointing the transmitter under various scenarios.

    The point of this was a very useful exercise/learning curve that allowed me to understand exactly
    what needed to be tackled in the way of a design goal.

    BTW) With this setup I designed an adjustable 40kHz oscillator where I could adjust within +/- 20%
         of 40kHz.  Reason I mention this, is because you can optimize the resonate frequency of the
         transmitter/receiver to see a DRAMATIC increase in performance by an order of magnitude.




    Another helpful ultrasonic "test" device that is nice to have is an audible divide by 4 or 5 to bring down the
    40kHz into a "human" audible range..... What you hear may surprise you!

    To elaborate, I was working late one summer night and thought my 40kHz transmitter was malfunctioning.
    So I turned it off completely.... I Still heard a strange "random" noise in my receiver that altered as I
    moved about.. Being that my receiver was portable, I was able to target the source... INSECTS!!!
    I found what appeared to be a bluish-gray beetle (looked like a stink bug) composing a rather interesting
    45kHz song.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Beau Schwabe - Mask Designer III

    National Semiconductor Corporation
    (Communication Interface Division)
    500 Pinnacle Court, Suite 525
    Mail Stop GA1
    Norcross,GA 30071

    Post Edited (Beau Schwabe) : 2/23/2005 6:14:11 AM GMT
  • tehmoordartehmoordar Posts: 52
    edited 2005-02-25 17:43
    I have recently worked on sonar SRF08 and I followed the steps n NUTS and bolts and mine is working fine where you are stuck
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