Thank you all for your advice.<br><br>@Roman : what type of op-amp do you use? <br><br>Thanks!<br><br>Pierre<br><br><div class="gmail_quote">2011/6/17 Michael Shiloh <span dir="ltr"><<a href="mailto:michaelshiloh1010@gmail.com">michaelshiloh1010@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Are you using piezo sensors? :-)<br>
<br>
Try this for starters:<br>
<br>
<a href="http://www.arduino.cc/en/Tutorial/KnockSensor" target="_blank">http://www.arduino.cc/en/Tutorial/KnockSensor</a><br>
<br>
Note that there are other types of piezo sensors, but this is the most<br>
common type and probably what you mean. May or may not come in the<br>
black plastic case.<br>
<br>
They are also often called contact mics or piezo speakers. Best price<br>
is probably from those silly singing birthday cards. Ask your friends<br>
for their old ones and you'll probably get them for free.<br>
<br>
I also find that most lo-fi audio equpiment uses these as speakers:<br>
cordless phones, answering machines, assorted beepers and buzzers. If<br>
you collect old junk for future component salvage (I do), you probably<br>
have half a dozen of these already.<br>
<br>
Good luck and let us know what you make!<br>
<font color="#888888"><br>
Michael<br>
</font><div><div></div><div class="h5"><br>
On Fri, Jun 17, 2011 at 5:27 AM, Pierre Massat <<a href="mailto:pimassat@gmail.com">pimassat@gmail.com</a>> wrote:<br>
> Dear List,<br>
><br>
> This is yet another question about Arduino. Sorry about that.<br>
> I want to use piezos to trigger samples using my arduino board. I want the<br>
> trigger to be sensitive, and a quick google search seems to show that piezo<br>
> is the way to go.<br>
> Does anybody have any experience with piezo triggers (what type of piezo,<br>
> isolating each piezo, etc.)? I will hit the piezos with my bare fingers (no<br>
> drumsticks or anything like that), but i guess it doesn't really matter<br>
> since i can control the threshold within Pd.<br>
><br>
> This last sentence is just to make sure that everyone knows i'm talking<br>
> about piezos in case there wasn't enough occurences of the word in my<br>
> message.<br>
><br>
> Cheers!<br>
><br>
> Pierre<br>
><br>
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