Mbira
Well-known member
A friend wrote me this the other day, but I think it's BS:
He is using several piezos in a row on a piece of wood, and my thought is that the sound waves traveling through the wood may reach the piezos at different times-thus creating the polarity problem, but this is not an issue in the piezos themselves...am I missing something?
One problem that most people do not take into account with Piezos is that they have random polarity. I often use as many as ten piezos wired together and the trick is to make sure they all have the Ceramic as the +. I use a oscilloscope to test but you may be able to use a good volt meter. If you put piezos of different polarity in line you get automatic cancellation.
He is using several piezos in a row on a piece of wood, and my thought is that the sound waves traveling through the wood may reach the piezos at different times-thus creating the polarity problem, but this is not an issue in the piezos themselves...am I missing something?