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
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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
3,507
512
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.

Feb 19, 2010
3,507
512
4. Lestraveled Well-Known Member

May 19, 2014
1,957
1,218
Here is your circuit with an amplifier strapped on. It uses two 9 volt batteries.

Mark

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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
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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
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1,218
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