# Can anyone help me with small sound circuit please?

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#### micknight

##### New Member
Hi,
Im just here to ask for some expert advice really, can anyone tell me whether it would be possible to fit a small sound device( similar to the ones in a greetings card, in a measurement of roughly 12mm circumference by 40mm in length? Ive been told they use some sort of crystals as energy source which might be of use. And if poss, how loud could it be?
Thanks,
Marsh.

#### blueroomelectronics

##### Well-Known Member
Well most us earthlings still use batteries as a power source. What's it for? How loud do you need it?

#### micknight

##### New Member
I think they are called piezo crystals im not sure im really not too clued up on this, hence the questioning. And to be frank, as loud as a fart. its for a gag gadget.

##### Banned
Buy one, someone mentioned the other day that you can buy recordable mothers days cards. Mind you the speakers are going to be slightly larger than the dimensions you posted.

#### blueroomelectronics

##### Well-Known Member
Or go old school and buy a fart cushion.

#### gabeNC

##### Member
Or go old school and buy a fart cushion.
Ahh yeah good 'ol "whoopee cushions". According to the wiki they were invented in 1930... didn't know they were that old.

These things are great The Fart Machine - The Original Remote Controlled Fart Machine
Nothing like juvenile humor to really tick my wife off. Slip in her purse when she's walking through the store... the range on it is pretty good.

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