Just needs a little work to mount it right behind where some who rings the doorbell would be standing – best way to scare off the in-laws.

put it in the car and the next time someone cuts you off you can scare them off the road :)

At first glance a uC seems over kill. But they are so cheap and the eventual plan was to have clock function so it wouldnt go off at 3AM and it also has the benefit of being able to blank out repetitive rings before you can make it to the door before your asshole friends blow a train whistle in your house 6 times.

At least I didn’t use an arduino…

ziegler:

I plan to make another vid. My dog is just very unhappy with me at the moment. I played the video on my computer while he was eating meat and he jumped up and ran upstairs after just hearing the Eeyore part of the doorbell.

I think firing it inside while I am outside may work. We will see.

oh cool, I want one of these on my car. >_<

@Jim

I definitely second that, time for some serious Nikki-nikki-nine-door :P

It would be cool to PWM that thing, within the obvious frequency’s limitations.

Kudos to Pete for not using an Arduino!, I bet there are quite a few guys wondering: how does the damn thing work without one??!

hehe…

Where is the train?

@Walt:

I was anthropomorphizing the system. The doorbell sounds like Eeyore and the train whistle is insanely loud.

Why do you need a microcontroller? Can’t you just put the bell trigger directly into the relay save some voltage adjustment?

Even a tank that small can kill you. Dont kid yourself.

You can have a tank hydroed in most cities.

Hydro does not check for leaks. It tests for structural soundness of the container. For high pressure gas cylinders they are placed in a concrete well with water and pressurized. Based on the amount of water displaced in the well the cylinders condition can be determined.

Basic testing can be done at home by plugging all ports except for one. Fill the tank completely full of water, no air. In the remaining port you put a plug with a pressure gauge and a grease zerk. Use a grease gun to inject grease to raise the tank pressure to your test pressure. More detailed procedures can be found.

I’d think that oilless compressor would be just as loud and annoying as that whistle would be.

Someone has already mentioned it but those welds are indeed very dangerous.

@John Doerman:

“those welds” are no more dangerous than the welds that hold on the end caps of the compressor from the factory.

@the_rest_of_the_schoolgirls:

Don’t worry about it; it’s not in your basement.

Im a notoriously heavy sleeper, so i’m thinking of doing something similar with an alarm clock..

But damn, i would get yelled at when my girlfriend stay over!