[sdiy] [OT] Mini-DSP or TI Mini-DSP for metal detector audio

KD KD pic24hj at gmail.com
Thu May 3 02:27:05 CEST 2012


Check with http://www.geotech1.com/forums/index.php?s=5aa033a2960aa15a22c140cbaab60551
lot of competent folks there, it's THE forum for this sort of stuff.



2012/5/2, Barry Klein <Barry.L.Klein at wdc.com>:
> Second shot at sending this - I didn't see the first attempt work.  Sorry if
> duplicate...:
>
> One of my many "other" hobbies is metal detectors - DIY and use.
> I recently obtained one called a Minelab GP Extreme.  These models of
> detectors from Minelab do not have speakers - they rely upon headphone use.
> That's cool at the beach, but in the desert I'd like to be able to hear
> snakes if they make themselves known.
> These detectors typically have a constant audio output tone that is a little
> warbly but gets louder and/or varies in frequency if a target is detected.
> There was a product called Superfix that may have had a DSP inside to allow
> silence until a target is detected.  It was complicated to use though and
> very very expensive.
> I'm wondering if one of these mini-DSP things:
> http://www.minidsp.com/index.php would be worth trying on the detector audio
> and what features may be cool to have.
> TI also makes a series of chips with what are called mini-DSP (such as the
> PCM3070) I don't know if both are really using the same parts or not.
> Have any of you tried either of these?  I'd like to ask questions regarding
> their capabilities.
>
> Barry
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