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Testing Watch Piezo Diaphragm

boblalux

By boblalux
in Watch Repairs Help & Advice

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boblalux Watch Enthusiast

boblalux

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I have  a number of loose piezoelectric diaphragms (for buzzer alarm) which I wish to test.   I understand this must take place with an AC voltage source.  Can I use the headphone output of my laptop - 4V AC?

Do I have to place the diaphragm on a metal base for the test, or can I test them just as they are?

Piezo.JPG

Edited by boblalux
correction
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boblalux Watch Enthusiast

boblalux

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48 minutes ago, rogart63 said:

Shouldn't they use the same voltage as the watch? Usually 1,5 volt as in the battery? 

Perhaps, but being a Timex Indiglo watch (Expedition), voltages up to 200V are produced within the watch.  Thus, I suppose any voltage above 1.5V is possible.

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rogart63 Distinguished Member

rogart63

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55 minutes ago, boblalux said:

Perhaps, but being a Timex Indiglo watch (Expedition), voltages up to 200V are produced within the watch.  Thus, I suppose any voltage above 1.5V is possible.

Can't imagine they could hold up for 200V ? But i don't now so much about electricity? Maybe the ampere is low? Or is it watt? 

Couldn't you test if there goes currency through the piezo. With a test instrument? 

I googled that all piezo in watches are  piezo audio transducers and are low voltage. At least they work on low voltages but can also work on higher voltage? 

 

Edited by rogart63
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