ej pierre regarding sensitivity a FSR = force sensitive resistor might be interesting as well?! salutis ΓΈ
On 06/17/2011 03:15 PM, Pierre Massat wrote:
Hi Roman, thanks for your reply. I'm afraid i can't use a soundcard to capture the input from the piezo (I don't want to buy one just for three little triggers). If what you're saying is true i guess i will just use three switches and forget about the sensitivity. Pierre 2011/6/17 Roman Haefeli <reduz...@gmail.com <mailto:reduz...@gmail.com>> Hi Pierre Actually, I wouldn't connect the piezos to an arduino, but to a sound card, because the piezos will likely give very very short spikes and the sampling rate of the analogIns of the arduino is quite low (don't know the exact value) compared to the sampling rate of a common sound card. Also, you have more control in Pd to build a trigger detection filter then on the arduino. Also you would likely get much lower latency with a good audio setup than with the atmega->ftdi->usb->comport path. Also when using the soundcard, the latency is constant, while you would have glitches with the arduino. I'd be glad to hear other opinions, though, since my thoughts are purely theoretical. I haven't implemented a piezo-based trigger, neither with sound card nor arduino. Roman On Fri, 2011-06-17 at 14:27 +0200, Pierre Massat wrote: > Dear List, > > This is yet another question about Arduino. Sorry about that. > I want to use piezos to trigger samples using my arduino board. I want > the trigger to be sensitive, and a quick google search seems to show > that piezo is the way to go. > Does anybody have any experience with piezo triggers (what type of > piezo, isolating each piezo, etc.)? I will hit the piezos with my bare > fingers (no drumsticks or anything like that), but i guess it doesn't > really matter since i can control the threshold within Pd. > > This last sentence is just to make sure that everyone knows i'm > talking about piezos in case there wasn't enough occurences of the > word in my message. > > Cheers! > > Pierre > _______________________________________________ > Pd-list@iem.at <mailto:Pd-list@iem.at> mailing list > UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list _______________________________________________ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
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