Arduino
Posted: 27 March 2010 06:37 PM
Newbie
Rank
Total Posts:  16
Joined  2010-02-12

Hi,
We are trying to use piezo speaker to detect vibrations but so far no luck at getting proper readings.  Does any one have any experience in piezo / arduino combination for vibration?

Profile
 
 
Posted: 30 March 2010 07:26 AM   [ # 1 ]
Newbie
Rank
Total Posts:  20
Joined  2010-02-17

How did you connect the piezzo? I am guessing you need a small op-amp circuit to get proper reading since the piezzo won’t give you 0-5 volts, but probanbly more in the range of microvolts.

Profile
 
 
Posted: 04 May 2010 03:09 PM   [ # 2 ]
Newbie
Rank
Total Posts:  5
Joined  2010-02-17

For me piezos worked without amplification, but it is probably a good idea.
I found it very helpful to use capacitors for smoothing the signal.

Profile