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Groups > comp.arch.embedded > #27364
| Subject | Re: Can a piezo buzzer generate damaging voltages? |
|---|---|
| Newsgroups | comp.arch.embedded |
| References | <orh3ef$1qpp$1@gioia.aioe.org> <orkn5p$blb$1@dont-email.me> |
| From | Clifford Heath <no.spam@please.net> |
| Message-ID | <ronDB.6032$sb3.2660@fx33.iad> (permalink) |
| Date | 2017-10-11 22:37 +1100 |
On 11/10/17 20:08, o pere o wrote: > 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 Who?
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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
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