Please tell me what this is

Discussion in 'General Electronics Chat' started by Kr0320, Mar 21, 2016.

  1. Kr0320

    Thread Starter New Member

    Dec 20, 2015
    7
    1
    I feel rather stupid to even be asking this... It came with a kit I got a while ago, I believe it to be a microphone. Can anyone specify?
    What1.png What2.png
     
  2. #12

    Expert

    Nov 30, 2010
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    Could be a piezo buzzer, too.
     
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  3. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
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    ...Either that or a small piezo speaker
     
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  4. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
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    @Kr0320
    Did the kit, perchance, feature an ultrasonic range-finder? -- It's about the right size for a low-power ultrasound transducer...

    Best regards
    HP:)
     
  5. MrChips

    Moderator

    Oct 2, 2009
    12,441
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    ... or both, a piezo transducer... can be used as a microphone or a buzzer.
     
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  6. WBahn

    Moderator

    Mar 31, 2012
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    What is the kit for? That might give a clue.

    Does the kit not have a parts list?
     
  7. Kr0320

    Thread Starter New Member

    Dec 20, 2015
    7
    1
    Everything was taken out when I organized my stuff a while back. It was a kit with an aruino uno. I do recall 2 stepper motors that also came with it. No range finder(that im used to seeing) as far as I can remember, but I might be wrong about that. Don't have the parts list either.
     
  8. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
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    If it was a robot it may have featured a range finder for obstacle detection? -- Just a thought:)

    Best regards
    HP
     
  9. blocco a spirale

    AAC Fanatic!

    Jun 18, 2008
    1,438
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    Measure its resistance, I'm guessing it's a tiny moving coil loudspeaker.
     
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  10. Kr0320

    Thread Starter New Member

    Dec 20, 2015
    7
    1
    Measures at 7.1 ohms
     
  11. WBahn

    Moderator

    Mar 31, 2012
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    Suspiciously close to 8 Ω -- a moving coil speaker (don't know about the 'loud' part of it) is sounding (no pun intended) more likely.
     
  12. wayneh

    Expert

    Sep 9, 2010
    12,123
    3,047
    A lot of the kits include a force sensor, but those have a high resistance when not under pressure.
     
  13. Dr.killjoy

    Well-Known Member

    Apr 28, 2013
    1,190
    156
    It's a small speaker no doubt ...
     
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