Where is the darn piezo (with pics)

snipped-for-privacy@nospam.com (Mike_in_SD) wrote in news:985E9AAAFIdontthinksonospamco@70.169.32.36:

It might be in the case shell. Psion organisers used that method, they used tiny springs to contact to the board just like the pads on each side of that ferrite thing's area. I'm guess in this case those could be power supply input though.

If you can get power to it while it's open, make it beep and track the source with a bit of cable sheath used as a stethoscope.

I Googled Kingstate Piezo. Guess What?

BTW the ferrite thingy appears to have two pins shorted.

Regards,

Boris Mohar

Got Knock? - see: Viatrack Printed Circuit Designs (among other things)

void _-void-_ in the obvious place

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That looks to be intentional, from what I can see in his image. I'd want to be taking a closer look at it to be certain, though.

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thanks guys .. guess I will have to get some power to it and try the tube in my ear type thing ..

thanks ..

mike

Or look at this:

which is close in part numbering and general arragement except for the hole in the top so perhaps yours has a hole underneath.

HTH

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Graham W   http://www.gcw.org.uk/ PGM-FI page updated, Graphics Tutorial
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Change 'news' to 'sewn' in my Reply address to avoid my spam filter.

Or this even which I believe is the exact match.

(I first thought the 'J' was a '3' poorly printed!)

HTH

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Graham W   http://www.gcw.org.uk/ PGM-FI page updated, Graphics Tutorial
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Dorset UK  Info, Meeting Dates, Sites & Maps
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snipped-for-privacy@g3vpc.f.co.uk (Graham W) wrote in :

yep .. thats it ..

great !!!!!!!!!

thanks

now if i can just figure out how to remove it without having access to the other side of the circuit board ..

thanks again mike

duh .. never mind .. its surface mount . and it's already off ..

now to try and find a louder replacement

thanks again

mike

Add a couple of wires to reconnect it for testing, then try opening up the exit ports to let more sound out.

--
Graham W   http://www.gcw.org.uk/ PGM-FI page updated, Graphics Tutorial
WIMBORNE   http://www.wessex-astro.org.uk/ Wessex Astro Society's Website
Dorset UK  Info, Meeting Dates, Sites & Maps
Change 'news' to 'sewn' in my Reply address to avoid my spam filter.

snipped-for-privacy@g3vpc.f.co.uk (Graham W) wrote in :

thanks Graham .. thats a good idea ..

IF I do have to replace it .. my research has actually made me more confused ..

??????

piezo speaker piezo transducer piezo WITH driver circuitry on board piezo needing driven by outside circuitry

I am hoping that as long as the current draw .. and voltage needs are close .. that I can "try" another piezo.

mike

Turn down the volume on the locomotive :)

Maybe try attaching a single ear earphone to the outputs (+ -) and see if you can get a beep reaction through them. Then just simply plug the earpiece into your ear . You know those OLD types that were white and looked almost like a hearing aid with a long wire attached.

reader02.plus.net>:

snipped-for-privacy@ANTISPAMwhidbey.com (Barry & Nikki) wrote in :

I have looked for that damn volume control on the engine and just cant find it. grin

actually .. I just bought a whole bunch of different piezo's and tried them all and actually found some that were pretty much louder than the original and have wired one in ..

much better now ..

thanks a bunch

mike