Buzzer

Discussion in 'The Projects Forum' started by BULL04, May 21, 2014.

  1. BULL04

    Thread Starter New Member

    Jun 16, 2010
    7
    0
    Hello

    I am using Buzzer part number PKMCS0909E4000-R1.

    How to control the buzzer using micro-controller?
     
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    since it requires almost no current, just connect it to the output watch the polarity, + to output. it is a piezo electric speaker with an oscilator built in to make it sound.
     
  3. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    There are two kinds of piezoelectric transducers/buzzers.

    1) the transducer alone
    2) the transducer with built-in oscillator, i.e. a buzzer.

    You have just the transducer.
    You will need to generate a 0-3V square wave at 4kHz.

    Here is the data sheet:

    http://www.mouser.com/ds/2/281/PKMCS0909E4000-R1-304946.pdf
     
  4. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    why not just pulse the output? a little subroutine to pulse the output will sound the buzzer, change the rate to change the frequency .
     
  5. BULL04

    Thread Starter New Member

    Jun 16, 2010
    7
    0
    What do you think about this circuit?
     
  6. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,962
    1,097
    This circuit wont work because FDN340P is a P-MOS. And P-MOS will be always ON because Current will flow through PMOS body diode.
     
  7. BULL04

    Thread Starter New Member

    Jun 16, 2010
    7
    0
    Sorry, It should be N FET , part number: IRLML2803
     
  8. MrChips

    Moderator

    Oct 2, 2009
    12,449
    3,365
    Too fancy and totally unnecessary.
    You can connect the transducer directly to an output pin of the MCU with no harm.
     
    BULL04 likes this.
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