@bmillier
Thanks again.
Yesterday I decided to connect the Piezo sensors straight to the SGTL's LINEIN.and suprisingly It actually works OK but with some constant noise around 3.8KHz.
so for now, no buffer, no filter..
It is not strange if we take in account that the piezo has really big impedance?
I think that I should try to connect the piezo straight to the buffer you suggested to get some gain, for that I should feed the negative supply of the op-amp? (with the ICL7660?)
Thanks again.
Yesterday I decided to connect the Piezo sensors straight to the SGTL's LINEIN.and suprisingly It actually works OK but with some constant noise around 3.8KHz.
so for now, no buffer, no filter..
It is not strange if we take in account that the piezo has really big impedance?
I think that I should try to connect the piezo straight to the buffer you suggested to get some gain, for that I should feed the negative supply of the op-amp? (with the ICL7660?)
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