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Thread: Need help making a loud bang using a 9V battery

  1. #1 Need help making a loud bang using a 9V battery 
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    Ok...For some unknown reason, i wondered this question: How to generate a LOUD bang, starting from a simple 9V battery?

    I do not want to blow up the battery :wink: I am thinking about some sort of circuit.
    I know some toys out there can make some incredibly loud and annoying sound, but I need something that sounds like a firing gun.
    It has to be something not consumable....

    Is that possible, using a capacitor or something?


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  3. #2  
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    If you really want to mimic the sound of a firing gun then you should use some sort of explosive charge such as fireworks or a starter's pistol.

    Sure you can generate a loud, short noise through a speaker. It won't sound like a gunshot unless you can record and then re-create the waveform of this particular sound.

    A simple start would be to use a large capacitor in a suitable R-C circuit to send a burst of voltage through a speaker. You can then modify to your heart's content.

    What, if I may ask, is your purpose?


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  4. #3  
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    there's no real purpose of this...i was just wondering.

    I was thinking of a toy pistol using a battery to create a fake recoil and a fake shooting sound, without actually shooting anything.

    I thought of using fireworks or small explosives used in toy guns, but I want it to be working without any consumables.
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  5. #4  
    Forum Freshman spirytus's Avatar
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    9V battery?, well, a speaker and a circuit board that generates a short pulse - a pop via the speaker, or even a playback of a "gun shot". Problem with this is that it wont be very loud, even if you amplify considerably.

    Another way is by using capacitors in your circuit and than discharge once the trigger is pulled (similar to a camera flash). Problem with this is, depending on the capacitor, there will be a considerable charge delay (0.5 ~ 4 seconds) and you may blow your speaker if it isn't properly matched. Plus you'll drain that battery quite fast if you manage to get a loud enough 'bang'.

    Best approach to this problem is to forget electronics all together. Design a pneumatic system, the expansion/release of compressed air can be quite loud, even deafening in some instances... You can compress air via a hand pump (ie: super soaker), and release via a quick-realease high-flow air-valve or electric solenoid into some sort of a chamber to focus the sound-blast (ie: barrel or air-horn/cone).
    There are 10 types of people; those who understand binary, and those who don't.
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  6. #5  
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    Oh well...thanks for the help

    btw nice signature spityrus :P
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