| ??? 12/24/10 11:39 Read: times |
#180274 - Piezo signals high dynamic range Responding to: ???'s previous message |
It's worth bearing in mind that piezos can generate hundreds, and maybe thousands of volts. They are after all used in igniters, where they generate sparks over several millimeters. Even standard buzzers will generate hundreds of volts, which is why it's problematic if you want to use them as sounders in an explosive atmosphere.
I would look at some form of log amp to reduce the dynamic range before feeding the signal into an ADC. Acoustic levels work in decibels (which are logarithmic), so this might give a good 'feel'. |
| Topic | Author | Date |
| measuring piezo voltage | 01/01/70 00:00 | |
| Oscilloscope | 01/01/70 00:00 | |
| you ned to read up on ... | 01/01/70 00:00 | |
| piezo sensing | 01/01/70 00:00 | |
| Careful with resolution or strength will feel "random" | 01/01/70 00:00 | |
| Really need ADC? | 01/01/70 00:00 | |
| source impedance | 01/01/70 00:00 | |
| Once digital? | 01/01/70 00:00 | |
| Piezo signals high dynamic range | 01/01/70 00:00 | |
| not 8051 specific? | 01/01/70 00:00 | |
| Some Reference Materials | 01/01/70 00:00 | |
| reference materials | 01/01/70 00:00 | |
| Two comments | 01/01/70 00:00 | |
| one comment on a comment | 01/01/70 00:00 | |
| made good progress | 01/01/70 00:00 | |
| not necessarily a good idea | 01/01/70 00:00 | |
zener | 01/01/70 00:00 | |
| one important thing | 01/01/70 00:00 |