So I'm trying to make a science invention but I don't know how to make it work. I plan on having someone sit on a toilet seat causing pressure. When the pressure is released a sound goes off that doesn't stop until the toilet is flushed. But how do I do this? Please Help!

Is the sound supposed to alert the person to flush before he leaves the bathroom?

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Originally Posted by Wondergirl

Is the sound supposed to alert the person to flush before he leaves the bathroom?

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Yes exactly

Seems like you would have to hook up something inside the tank (to the trip lever) and connect it to the seat (pressure). Are you okay with a wire/cord going from beneath the seat to inside the tank?

If possible it would need to be visible

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Originally Posted by topcheese123

If possible it would need to be visible

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The seat would have to be "soft" or flexible. A wooden or plastic seat would be too rigid and wouldn't "notice" the pressure. (I'm thinking the pressure-recording device would have to be UNDER the seat.) And you don't want any alerts while the person is using the toilet (and scare him) .

Would just a noise be enough of an alert? The person wouldn't understand a noise and might think something is wrong with the toilet. Too bad it couldn't be a recording, "Please flush, please flush, please flush" that would continue until flushing happens.

I understand what your saying but I'm desperate and have a short amount of time to finish this project

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Originally Posted by topcheese123

I understand what your saying but I'm desperate and have a short amount of time to finish this project

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When is it due? How long have you been working on this?

I PMed two of our Plumbing guys to look at this thread and tell you if this is even possible. This is YOUR project, so I warned them only to give you hints, not tell you how to do this. I don't know when they will be online (they come on several times a day), so check back now and then.

One of the Plumbing guys PMed me with this:

"this would be more of a electronic question whether than a plumbing question. But if I had to improvise. I would put a context switch in the seat that connects to a normally open relay. This will activate a sound,(could be a quiet Bell or buzzer) that only quits when you push the flush lever."