Simple project powering a buzzer from a alarm clock

Discussion in 'The Projects Forum' started by jaychinfreckle, Jul 24, 2014.

  1. jaychinfreckle

    Thread Starter New Member

    Jul 24, 2014
    1
    0
    I am very new to circuits and such but i want to know how to power a buzzer i took out of an alarm clock. And if i can do it with 2 AA's. all the buzzer says on the back is 16ohm 1W [​IMG][​IMG]
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    mainly having trouble with the math equations, i have a breadboard thouugh
    [​IMG][​IMG]
     
    Last edited: Jul 24, 2014
  2. wmodavis

    Well-Known Member

    Oct 23, 2010
    737
    150
    That is not a buzzer it is a speaker. You need to provide it an appropriate ac signal to produce a buzzing sound. If you hook up batteries it will make a click and no more and might burn out the voice coil of the speaker and certainly quickly discharge the battery.
     
  3. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    5,773
    1,103
    An 'AC' signal (~1kHz) could be derived using a circuit like this. R2/R3 can be changed to change the sound frequency. Strictly speaking this is a pulsing DC rather than AC signal, but the sound will be similar.
     
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