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Piezo sensors/ tranducers

Discussion in 'Sensors and Actuators' started by fbchurch2009, Oct 10, 2011.

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  1. fbchurch2009

    fbchurch2009

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    Jan 10, 2010
    So I want to assemble my own pickup for my instrument. But I was wondering if piezo sensors can be stereo? I would probably need to have more than one piezo sensor to hooked up to the quarter inch jack for it to be stereo, right? Also, where can I get a good quality, wide bandwith piezo sensor? Thanks!
     
  2. OLIVE2222

    OLIVE2222

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    Oct 2, 2011
    hello,

    I remember having fun with drums based on a piezo buzzer acting as a sensor. I doubt it can be stereo due to the needed surface too have usable level. By the way I remember the need for a high gain amplifier stage (something in the 10.000 range).

    have fun,
    Olivier
     
  3. duke37

    duke37

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    767
    Jan 9, 2011
    Weren't ceramic record player pick-ups based on the piezo principle and were stereo?
     
  4. OLIVE2222

    OLIVE2222

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    Oct 2, 2011
    Hi, if I remember well piezo pick-ups are based on coils which is different from sensors I talks about as they are build with 2 parallel plates. Do you want to build drum or guitar "sensors" ?

    Olivier
     
  5. fbchurch2009

    fbchurch2009

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    Jan 10, 2010
    Last edited: Oct 10, 2011
  6. fbchurch2009

    fbchurch2009

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    Jan 10, 2010
    Transducers

    This actually pertains to the thread I posted earlier. But where can I find a wide bandwidth transducer for my instrument? Do they make transducers that pick up all frequencies between 100Hz and 2kHz...? If so where can I find one? Thanks!
     
  7. davenn

    davenn Moderator

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    1,870
    Sep 5, 2009
    from the pic on that site I doubt its stereo. Reading down the page stereo pickups are rather complex devices with multiple coils, at least one coil for each string. Some units have each string coil coming to a separate output.

    Dave
     
  8. OLIVE2222

    OLIVE2222

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    Oct 2, 2011
    Googling "diy guitar pickup" give many answers. It use very thin wire, so tricky but feasable.

    Olivier
     
  9. fbchurch2009

    fbchurch2009

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    Jan 10, 2010
    thanks, I had another quick question after lookin up some things. What does the frequency specification on this page mean? http://search.digikey.com/us/en/cat/audio-products/buzzer-elements-piezo-benders/721679?k=piezo Does it mean it only picks up that frequency? I am not quite understanding..... Or is this even exactly what I need? Here is the page before has this with all the different categories.
    Exactly which category should I be looking under? Vibration? Buzzer elements? Need help.

    Audio Products
    Buzzer Elements, Piezo Benders (56 items)
    Buzzers (1,243 items)
    Microphones (6 items)
    Sirens (4 items)
    Speakers (8 items)
    Integrated Circuits (ICs)
    Linear - Amplifiers - Audio (3 items)
    PMIC - Motor and Fan Controllers, Drivers (14 items)
    PMIC - Power Management - Specialized (2 items)
    Kits
    Audio (1 items)
    Programmers, Development Systems
    Eval and Demo Boards and Kits (2 items)
    Eval Boards - Sensors (1 items)
    Sensors, Transducers
    Accelerometers (6 items)
    Accessories (2 items)
    Magnetic - Position, Proximity, Speed (Modules) (12 items)
    Shock (2 items)
    Vibration (13 items)
    Switches
    Keypads (9 items)
    Pushbutton (101 items)
    Test and Measurement
    Specialized Test Equipment (1 items)
    Transformers
    Specialty (3 items)
     
  10. duke37

    duke37

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    767
    Jan 9, 2011
    The Digikey reference describes piezo buzzers, not pick-ups.

    The piezo effect is due to a voltage developed across a cystal when it is deformed (pick-up), or a voltage placed across a crystal will deform it (buzzer).

    Piezo pick-ups have no coils.

    Why do you want a stereo pick-up? Why not use two mono pick-ups?
     
  11. fbchurch2009

    fbchurch2009

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    Jan 10, 2010
    well I was just wonderin why some people use stereo, but Im not intending on bothering with it. So where can I get piezo pickups that are not already assembled? I just want the transducer...
     
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