Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.arch.embedded > #27363
| From | o pere o <me@somewhere.net> |
|---|---|
| Newsgroups | comp.arch.embedded |
| Subject | Re: Can a piezo buzzer generate damaging voltages? |
| Date | 2017-10-11 11:08 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <orkn5p$blb$1@dont-email.me> (permalink) |
| References | <orh3ef$1qpp$1@gioia.aioe.org> |
On 10/10/17 02:15, John Speth wrote: > My team is being asked to find out why a circuit is failing for no > obvious reason. The circuit has a piezo buzzer (CEP2242 from CUI, Inc). > The buzzer is driven by a MCU driven FET that completes a circuit like > this: high side power 3.3V -> buzzer -> FET -> ground (BSS123LT1 FET on > the low side). > > Does anybody have any experience with the possibility of a piezo buzzer > generating damaging voltage spikes when dropped? We have no protection > diodes on this part of the circuit. > > At this stage, we have no information of exactly what's failing. We do > have evidence that some failed units have been dropped. I'm following > through on a hypothetical failure path which we need to either consider > further or discard. > > Thanks - JJS > As John points out in his response, the answer is yes. A piezo igniter works on this principle. It is a bidirectional transducer from mechanical to electrical energy. You can test it placing a scope on the terminals of the buzzer and see what comes out. Pere
Back to comp.arch.embedded | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Can a piezo buzzer generate damaging voltages? John Speth <johnspeth@yahoo.com> - 2017-10-09 17:15 -0700
Re: Can a piezo buzzer generate damaging voltages? Clifford Heath <no.spam@please.net> - 2017-10-10 13:55 +1100
Re: Can a piezo buzzer generate damaging voltages? o pere o <me@somewhere.net> - 2017-10-11 11:08 +0200
Re: Can a piezo buzzer generate damaging voltages? Clifford Heath <no.spam@please.net> - 2017-10-11 22:37 +1100
Re: Can a piezo buzzer generate damaging voltages? o pere o <me@somewhere.net> - 2017-10-16 09:56 +0200
Re: Can a piezo buzzer generate damaging voltages? Chris <xxx.syseng.yyy@gfsys.co.uk> - 2017-10-11 23:10 +0000
Re: Can a piezo buzzer generate damaging voltages? John Speth <johnspeth@yahoo.com> - 2017-10-11 16:46 -0700
Re: Can a piezo buzzer generate damaging voltages? "petrus bitbyter" <petrus.bitbyter@hotmail.com> - 2017-10-12 15:32 +0200
Re: Can a piezo buzzer generate damaging voltages? Chris <xxx.syseng.yyy@gfsys.co.uk> - 2017-10-12 14:31 +0000
Re: Can a piezo buzzer generate damaging voltages? John Speth <johnspeth@yahoo.com> - 2017-10-12 13:48 -0700
Re: Can a piezo buzzer generate damaging voltages? Jan Coombs <jenfhaomndgfwutc@murmic.plus.com> - 2017-10-15 18:12 +0100
csiph-web