simple audio amplifier for loud "beep beep'' sound.

Discussion in 'The Projects Forum' started by steven2410, Jul 7, 2014.

  1. steven2410

    Thread Starter New Member

    Jul 7, 2014
    16
    0
    Hi everybody, I'm new to electronics and hoping to build a simple circuit that can generate a loud "beep beep"or "ticking bomb" sound ( or anything like that) - the sound would be on/off for 0.3s interval. I have found sth on instructable for this, however, the sound is not loud enough (Used 10W speaker). I need a very loud sound that can be hear clearly from ~20 m away and powered by battery cell ( those 9V or 1.5V cells). I have a 10W & 8 ohm speaker at home.
    It would be lovely if anyone can give me the circuit for this. Any directions, instructions or advises are appreciated.
    THis is the ticking bomb circuit i mentioned above: http://www.instructables.com/id/Ticking-bomb-package/
     
  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
    3,388
    497
    Assuming ideal performance.
    10 Watts=8 Ohm*I^2
    I=1.12 Amperes

    That is not a joking amount of current.

    This came out of the Mouser search: http://www.mouser.com/ds/2/405/slos527a-88277.pdf

    If you setup two 9 volt batteries in series, this will give you 18 volts. I don't know how long the batteries will last, but it meets the required 10-30 volt supply needed for above linked audio amplifier IC.
     
  3. shteii01

    AAC Fanatic!

    Feb 19, 2010
    3,388
    497
  4. Lestraveled

    Well-Known Member

    May 19, 2014
    1,957
    1,215
    Here is your circuit with an amplifier strapped on. It uses two 9 volt batteries.

    Mark
     
  5. steven2410

    Thread Starter New Member

    Jul 7, 2014
    16
    0
    i'm new to electronics and have no clue on integrate this amplifier into the circuit. It would be gold if you can give me a working circuit.
     
  6. Lestraveled

    Well-Known Member

    May 19, 2014
    1,957
    1,215
    This is your circuit with the added amplifier. It is complete. It is simply drawn a little different.
     
  7. steven2410

    Thread Starter New Member

    Jul 7, 2014
    16
    0
    i have tried your circuit on solderless board, but it doesn't work ... i'm pretty sure i get the circuit on the board right
     
  8. Lestraveled

    Well-Known Member

    May 19, 2014
    1,957
    1,215
    Oops
    I took you original circuit an added an amplifier. I checked the data sheet and pin 7 should be connected to pin 6.
     
  9. steven2410

    Thread Starter New Member

    Jul 7, 2014
    16
    0
    It works now, but the ticking sound is not much improved ... Thank you for your circuit. Guess i will try to look into piezo buzzer circuit.
     
    Last edited by a moderator: Jul 14, 2014
Loading...