Subject:
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Re: NXT Sound Sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 6 May 2006 00:13:56 GMT
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Viewed:
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7075 times
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In lugnet.robotics, Ross Crawford wrote:
> In lugnet.robotics, Brian Davis wrote:
> >
> > Using the NXT as a tuning fork is right out, as far as I can see. The
> > electronics might be up for it, but there are too many other complicating
> > issues.
>
> Hmmm is there a "raw data" mode for the sound sensor? Seems to me, it may be
> possible (maybe not yet but one day) to write a program that does FFT analysis,
> as long as it can get the raw wave data from the sensor.
>
> I'm assuming the "tone mode" does something along those lines in hardware, but
> it sounds (oops sorry pun) like it may be a little limited.
There is a curious 6th wire connection from the sound sensor which sends analog
sound to the CPU. I am assuming that using some 3rd party firmware, it might be
possible to digitize and process sound data. But I think turning the CPU into a
DSP would rule out all the other processing which needs to take place to perform
as a NXT handling bluetooth, USB, 4 channels of bit banged I2C, motor loop
control etc at the same time. There are only so many CPU cycles available in
every second :)
JB
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Message has 1 Reply:
 | | Re: NXT Sound Sensor
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| (...) I agree about high grade DSP, but frequency discrimination may be quite possible... in the past we had a product based on a puny 8MHz 80C188 that was able to run ISDN stack, transfer 64 kbits/s data on one channel, 64 kbits/s voice on the (...) (20 years ago, 6-May-06, to lugnet.robotics)
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Message is in Reply To:
| | Re: NXT Sound Sensor
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| (...) Hmmm is there a "raw data" mode for the sound sensor? Seems to me, it may be possible (maybe not yet but one day) to write a program that does FFT analysis, as long as it can get the raw wave data from the sensor. I'm assuming the "tone mode" (...) (20 years ago, 5-May-06, to lugnet.robotics)
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