anaolog users, what about using graphic mhz pitch tone meters?

[amcjavelin]

Have been doing some thinking and was wondering if anyone has tried hooking up a mhz meter or a sound meter that measures the frequency of sound to there machine some how to verify different metal signals, instead of using continuity #'s why not try using mhz #'s to measure the pitch of tone for the good or bad signals, this would be great on those windy days or if your just having that off day just currious anyone out there with the technical skill if this could be done accurately and efficiently to a degree?

 

[Elton]

n/t

 

[amcjavelin]

-- moved topic --

 

[amcjavelin]

well a meter that would be more effective torwards single tone machine I guess and measures the actual pitch of the sound when swung across a for say a nail vs coin? the abruptness of the iron tone would show a mhz freq pitch set of #'s while a coin would show another

 

[Ism]

There frequency to voltage chips that could do exactly what you are thinking of. Turn a audio pitch into a voltage that could be displayed by a digital meter.

 

[amcjavelin]

thank you someone on the same page here with me here, so Ism do you think this would be a good idea or not?

 

[Ism]

I was going to try it, thats why I know about the chips. It think it would be a fun project but I ended up going a different route.
I don't see why it wouldnt work. If you have the skill to build the circuitry it would be fun and not too expensive project.

 

[Ism]

When I thought of this project, I was going to add a meter to my Minelab Sovereign using the audio output jack, but ended up making a meter and using the Sovereign meter output.
This would be a great way to add a meter to variable pitch detectors that have no external meter available. The only thing that would take some figuring is the scaling of the circuit ( frequency = volts), to match it up with a meter.
The neat thing is you could plug it in and remove it without any permanent alterations to the detector.

 

[amcjavelin]

I just wish i was more electronicly savvy to do stuff like this, i use to be good with cb radio and ham stuff years ago but this stuff just a little beyond me grasp