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What can i use this for/ how can i use it? Answered

I have several of these, they are used in cheap alarms and games to make beeps. How can i make it beep, or do other things, here is the picture.

https://www.instructables.com/file/F8N9STRFUPUPDYY/

I also have some that are completely flat, how do i use those?

Discussions

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frollardlemonie

Answer 10 years ago

the completely flat ones can be used as a sensor for a drum pad (like rock band)

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XOIIOfrollard

Answer 10 years ago

So, if i hook it up like a switch, and hit it, it will breifly turn on a LED, or something else?

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frollardXOIIO

Answer 10 years ago

negatory good sir - you'd hook it up like...a piezo :D a piezo element puts out electricity (in EXTREMELY minute quantities) when they are impacted - you'd need a circuit similar to an audio amplifier to boost the power from near zero to 'detectable' - then use that circuit to trigger as a 'switch'. Sadly they're not a very easy 'drop in' component.

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XOIIOfrollard

Answer 10 years ago

OK, maybe I'll use them to decorate something, maybe make a mini robot out of scraps.

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frollardXOIIO

Answer 10 years ago

really its not too tough - it only needs like 2 transistors, a capacitor, and an uuber resistor - so the tiny pulse from the piezo triggers the transistor, and the transistor triggers the other transistor. You can get a digital pulse out to use as a tap sensor.

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XOIIOfrollard

Answer 10 years ago

Is there an instructable to do that?

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XOIIOfrollard

Answer 10 years ago

Hmmm, that gives me an idea....

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lemoniefrollard

Answer 10 years ago

That is a flat one I think, but has a resonance chamber attached to it. Being metal I wouldn't recommend trying to remove it (they can break fairly easily, I know...) L

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frollardlemonie

Answer 10 years ago

thats what I mean - the chamber might cause some loss in detecting impacts...

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lemoniefrollard

Answer 10 years ago

Yes I agree. I've broken these trying to take 'em apart... L

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XOIIOlemonie

Answer 10 years ago

Ummm... your link appears to not exist?

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lemonieXOIIO

Answer 10 years ago

I made a tiny error on the formatting - see the ) is in the hyperlink? It can't find the document.html)
If you remove the ) it gives you an example, but there are lots. "sine wave oscillator" might be a good search term

L

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Dr.Bill

10 years ago

you can use 2 to make a pair of head phones for a Crystal Radio Set.

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XOIIODr.Bill

Answer 10 years ago

Really, that would be interesting, now i just need to male a crystal radio set...