120 Decible Emiting Device

[elitesniper]

Hello fellow spudders, just wanted to post some pics of my weekend project other then spudding This is a device put together from things available at your local electronics store, this thing is just for some sense of security when your in public, with one flick of a switch it produces ear piercing 120 decibel sirens. The lump in the front is the piezo siren it is powered by a 9v battery wired inside, to change i just unscrew the four screw and replace the 9v in its clip, this thing is very rugged and will last many years , enjoy guys. oh and the warning sign I just printed off this website that you can make your own warning labels, an i taped it on

[BigGrib]

Cool is the speaker omni directional or uni directional

[elitesniper]

well its kinda between, but its mostly omnidirectinal so it doesnt damage your ear

[TurboSuper]

Heh, nifty.

I personally hate loud noises, but if I didn't, I'd build one of those

Mabye you should use a 556 to give it a two tone warble too, hehe.

[potatoflinger]

Hey, those are pretty useful, especially for pissing off the neighbor's dog I made something similar to this, except it had a timer on it so that it would go off for five seconds every three minutes, I used it to scare the birds out of our cherry trees.

[bigbob12345]

I personally hate loud noises

then do you dread firing your launchers

Elitesniper: Looks great.
that wouldnt annoy your neighbors at all

Edit: potatoflinger beat me to the neighbor thing, sort of

[elitesniper]

thanks big bob, and turbo, hey potatoflinger can you explain to me how you did the timer thing? is it a relay switch or something? i might put it in mine so it can have a little delay so that i can get away from it

[TurboSuper]

I personally hate loud noises

Edit: potatoflinger beat me to the neighbor thing, sort of

Heh, I figured I'd get that sort of question

Frankly, no, I don't. A launcher is a low-tone kapow! for a split-second, not a high-frequency shrill. I don't mind loud music either, it's just stuff like power tools and alarms that bother me.

As for the timer, I'm going to go off on a limb here and say you should use a monostable 555. A quick search on Google will tell all tales. I'm not sure of their accuracy with long time delays, though.

Edit: Actually, I think it would be a fancy 555 astable circuit for that kind of thing...

[elitesniper]

ah thanks, not all launchers are low toned kapows, hehe, Big Blue is a gigantic BOOOM!.

[psycix]

Awesome!
How does it exactly work?