Sizing a Piezo Buzzer for a Cheap Thermometer & Timer bought off eBay

Discussion in 'General Electronics Chat' started by markzz, May 30, 2016.

  1. markzz

    Thread Starter New Member

    May 25, 2016
    12
    0
    I bought a cheap thermometer & timer unit off of ebay. It has a decent LCD size. It reads the time, current temp probe reading and alarm temp setting.
    I will be using this on an electric bicycle I built, the probe will be placed inside the motor.

    I added pictures, they are 500KB in size as I am used to that in another forum I frequent.

    The piezo buzzer (sorry for the typo in the title, cant edit the title) is not that loud. I would like a REALLY loud buzzer. I read 0.03Vdc to 0.05Vdc when I probe the buzzer and press a button to get a sound.
    The buzzer has a circle with a + in the middle on one side, and XA on the other side. You can see it in the picture.

    How do I go about sizing a piezo buzzer for this device. I am sure there are many different ones out there.
    I use an online website for B&E Electronics be-electronics.com its a local store that has a huge inventory. I cant seem to access that page right now.

    Mod edit: fixed title - ask and ye shall receive :cool:
     
    Last edited by a moderator: May 31, 2016
  2. markzz

    Thread Starter New Member

    May 25, 2016
    12
    0
    I wont be able to get no schematic. The device was like $5 or something from China. El-Cheapo device off eBay.

    Anyone got any idea's at all to make this puppy REALLY loud?

    Perhaps an amplifier, or a transducer.

    $2.84 for this Piezo Buzzer but got no idea if it will work.
    http://www.be-electronics.com/product_p/61-224-0.htm
     
  3. markzz

    Thread Starter New Member

    May 25, 2016
    12
    0
    0.85V on the DMM in VAC mode.
     
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