The uses of piezoelectric disks

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SUMMARY

Small piezoelectric disks measuring 3.7x3.7 cm can effectively generate electricity, which can be utilized to power an LED when placed inside a tube with a buzzer at the opposite end. The discussion highlights the application of piezoelectricity in harvesting energy, specifically referencing military boots designed to convert walking motion into 1 to 2 watts of electricity. However, the practicality of such applications is hindered by comfort issues associated with the footwear.

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can small piezoelectric disks 3.7x3.7 cm inside a tube with a buzzer at the other end be able to power an LED
 
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Here's some discussion on piezo-electricty that discusses usages:

http://en.wikipedia.org/wiki/Piezoelectricity

One such usage was to harvest the electricity of walking with special military boots to get back 1 to 2 watts of electricity but the boots were too uncomfortable to wear.
 

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