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Author Topic: Piezo electric Crystals  (Read 4402 times)

Offline neilep

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Piezo electric Crystals
« on: 06/09/2006 01:32:54 »
My four year old loves her shoes that light up...and other toys that use the piezo electric phenomena.....and then my 12 year old goes and ruins it by asking me how the darn things work !!..I mean..I don't know...do you ?

Is there a lifespan to these things ?

How big is the crystal in the shoe ?

Is there a way that sustained pressure will maintain a sustained light ?


Thank You

Neil


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Offline Karen W.

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Re: Piezo electric Crystals
« Reply #1 on: 06/09/2006 03:58:29 »
I dont know if this helps, One of my three yeaar old student took off their light up snaekers and tried to ffflush said sneaker down the toilet, after several tries shoe was wedged in neck of toilet and ran over. Teacher to recue with plunger finds said shoe stuck and then removes said shoe from toilet!! Said shoe would not shut up as said shoe was also musical. Teaacher threw saaid shoe in wash...... When shoe came out , said shoe was still singing aand lit up! Said shoe was then dryed, and when finished, saaid shoe continued to sing.. Child refused to wear shoe anymore because it wouldn't stop. So parent took said shoes home and reported that said shoes were still singing lowly and lights still on  3 days later!!They threw said shoes away as were anoyed by its harmonic musical light show and diplay!!!!

Karen
 

Offline neilep

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Re: Piezo electric Crystals
« Reply #2 on: 06/09/2006 04:04:30 »
Wow !!..thanks Karen !!...that reminds me that I must take my shoes off next time I have a foot spa !!:)

Why did the little guy/gal flush it down the toilet ?...was the shoe already driving him/her mad ? :)



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Offline Karen W.

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Re: Piezo electric Crystals
« Reply #3 on: 06/09/2006 04:17:18 »
No the shoe was fine up until the toilet incident! I just wonder why it wouldnt stop, you know you asked if maybe you could press it or something, maybe being wedged in toilet neck tends to make someone, or something want to sing HEHEHEHE and glow!!! The child was simply exploring from a scientific view, new the elimination would go down and wanted to check it out!

Karen
 

Offline neilep

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Re: Piezo electric Crystals
« Reply #4 on: 06/09/2006 04:21:16 »
Do you think that's why birds sing ?...are nests a fraud ?...perhaps behind each nest is a cleverly deployed toilet neck that the birdies really live in !!....:)

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Offline Karen W.

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Re: Piezo electric Crystals
« Reply #5 on: 06/09/2006 04:57:55 »
I think birds sing cause I DRIVE THEM WILD!LOL Your such a card, they are probably Protesting because they don't like my singing and are trying to drown me out Sir!LOL

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ROBERT

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Re: Piezo electric Crystals
« Reply #6 on: 06/09/2006 16:32:15 »
www.media.mit.edu/physics/publications/papers/98.08.PP_wearcon_final.pdf

There is a diagram on page 4 of the above pdf showing the size and performance of piezo transducers used in flashing shoes.
« Last Edit: 06/09/2006 16:42:50 by ROBERT »
 

Offline neilep

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Re: Piezo electric Crystals
« Reply #7 on: 06/09/2006 17:24:00 »
quote:
Originally posted by ROBERT

www.media.mit.edu/physics/publications/papers/98.08.PP_wearcon_final.pdf

There is a diagram on page 4 of the above pdf showing the size and performance of piezo transducers used in flashing shoes.




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ROBERT

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Re: Piezo electric Crystals
« Reply #8 on: 06/09/2006 17:42:22 »
Bone is piezoelectric:-
" Fukada and Yasuda first demonstrated that dry bone is piezoelectric in the classic sense, i.e. mechanical stress results in electric polarization, the indirect effect; and an appplied electric field causes strain, the converse effect.
The piezoelectric properties of bone are of interest in view of their hypothesized role in bone remodelling "
http://silver.neep.wisc.edu/~lakes/BoneElectr.html

(Michael Caine accent), not a lot of people know that :)
« Last Edit: 06/09/2006 17:44:25 by ROBERT »
 

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Re: Piezo electric Crystals
« Reply #8 on: 06/09/2006 17:42:22 »

 

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