Step 6: Finished!

Hooray! now we get to test it! If all went well (and my instructable was accurate), the siren and ping pong ball light should spring into action at the press of the button! As you can see from the picture, I made a crude button holder by poking a hole in the top of a disposable cup. I also cut a notch in the side to let the wires out.
<p>What is the use of the resistor between the Arduino and the switch?</p>
Thanks! I let you in on a little secret: The ping pong ball wasn't my idea (I saw it online somewhere!)
This is really cool! i like how you put the ping pong ball over the light!
Looks like a good project. You might also look at using a small piezo speaker it will pull less power and prolly be louder. Good job on everything.<br>

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