Pulse Detector Depth Proformance

[6666]

Frequency counter ? Or one of those mini oscilloscopes, like here. https://youtu.be/ch9Iy8X5M4U

Yes at the time he called it a frequency counter

[ionut_mtb]

Have you done any experimenting with this circuit ???? my brain the same cannot process too much information...i just do things by trial and error...i did once modify a hammer head circuit so the vco worked at much higher frequency ins tead of click click and i included also amplitude as well than pitch...i supprised myself at the time cause it worked.....but that project ive shelved for now and i tended to concentrate on the surf pi.....to be honest the only audio i really like the sound of is that on the whites tdi series...which i would have no idea how to implement....so for me the surf pi has gone as far that i can do with just the lcd meter.

no, i did not experiment nothing. now that good weather came up, i want to spend more time detecting and doing other hobbies of mine. I did build an surf pi and a baracuda pi but still need to finish coils for them (enclose). I found this interested thread but, same, did not tried. maybe in the near future.

http://www.geotech1.com/forums/showthread.php?23728-Pulse-Audio-modification&highlight=manta

[daverave]

i came up with this example of surf pi, what do you think? i'm not so good with theory in electronics, my brain does not support to much information )

ch1 will be actualy allmetal and when big metal will come as a target the output audio will be mixed.

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Have you done any experimenting with this circuit ???? my brain the same cannot process too much information...i just do things by trial and error...i did once modify a hammer head circuit so the vco worked at much higher frequency ins tead of click click and i included also amplitude as well than pitch...i supprised myself at the time cause it worked.....but that project ive shelved for now and i tended to concentrate on the surf pi.....to be honest the only audio i really like the sound of is that on the whites tdi series...which i would have no idea how to implement....so for me the surf pi has gone as far that i can do with just the lcd meter.

[ionut_mtb]

It is certainly worth doing as i found it very useful if to dig or not to dig..i havent used different tones like you are planning just a single around 800 hz tone.

i came up with this example of surf pi, what do you think? i'm not so good with theory in electronics, my brain does not support to much information )

ch1 will be actualy allmetal and when big metal will come as a target the output audio will be mixed.

[daverave]

I was thinking to make a pi same like you said, with another two samples to identify high conductivity targets or large targets, by using another chanel and at the output to use 555 for diferent tone. If target is low conductive you will get one tone, if is high conductive the second chanel will change the tone in the speaker. And you will decide if want to dig the high cond targets. Of course deep high conductive or large targets at first will give as low conductive, but if you start digging and get closer to it the audio will change to high cond.

It is certainly worth doing as i found it very useful if to dig or not to dig..i havent used different tones like you are planning just a single around 800 hz tone.

[ionut_mtb]

hello greylourie...i did try a mini oscilloscope a long time ago but it was useless on the detector as could not be seen in day light..it just displayed the back emf curve...but after that i started to use a lcd display showing two bar graphs...i used two samples...one of all met al and the other later sample to help to determine if a large target like a can or other item...i found it very useful.

I was thinking to make a pi same like you said, with another two samples to identify high conductivity targets or large targets, by using another chanel and at the output to use 555 for diferent tone. If target is low conductive you will get one tone, if is high conductive the second chanel will change the tone in the speaker. And you will decide if want to dig the high cond targets. Of course deep high conductive or large targets at first will give as low conductive, but if you start digging and get closer to it the audio will change to high cond.

[daverave]

hello greylourie...i did try a mini oscilloscope a long time ago but it was useless on the detector as could not be seen in day light..it just displayed the back emf curve...but after that i started to use a lcd display showing two bar graphs...i used two samples...one of all met al and the other later sample to help to determine if a large target like a can or other item...i found it very useful.

[greylourie]

Hey Dave was it you that was experimenting with a frequency counter on the output of the preamp ? what was the outcome of that ?

Frequency counter ? Or one of those mini oscilloscopes, like here. https://youtu.be/ch9Iy8X5M4U

[6666]

Hi 6666....just come on the computer 00.57 am as i had a very bad panic attack which made me feel very ill...ive never experimented with frequency counter on output of 1st amp could have been someone else.

Hi Dave ok thanks, it must have been somebody else, my PC crashed a while back and I lost all my thread book marks, I seem to recall whoever was talking about useing a freq counter on their surf pi was getting some interesting results, I hope you are feeling better, cheers.

[daverave]

Hey Dave was it you that was experimenting with a frequency counter on the output of the preamp ? what was the outcome of that ?

Hi 6666....just come on the computer 00.57 am as i had a very bad panic attack which made me feel very ill...ive never experimented with frequency counter on output of 1st amp could have been someone else.

[6666]

Hey Dave was it you that was experimenting with a frequency counter on the output of the preamp ? what was the outcome of that ?

[daverave]

who cares if his detectors better if it is lol to him it must be, am a bit like you months of depression well how long i am in pain for, i have scheuermann's disease constant pain it is but at least i get out now and again even if its just for a hour or so, with my detectors I BUILT and yes my electronics suff is my escape to when i can do it, if not i program the wife understands and my kids to 37 years of constant pain but hey im still here doing my stuff

its true i guess what does it matter if someones machine is better than another...my pain is in my mind cause of things in the past that have happened to me and people who have hu rt me emotionally....the person i mentioned who made this detector i have known for many years but he has a habit of using people to prosper himself and i guess ive never learned to be strong and not to let people use me..i cannot class him as a true friend cause true friends dont use you to get what they want !! i tend to keep going down the same path and not learning from the past..in some ways i wish i had not mentioned him on this site !!!! im just a silly person who meddles in other peoples ego's and by doing this im helping to promote his idea's...maybe he is reading this but i dont care anymore...i feel like no more the fool !!! i should concentrate on my proje cts and try to better myself so i can find things for my lovely wife.

[kosacid]

who cares if his detectors better if it is lol to him it must be, am a bit like you months of depression well how long i am in pain for, i have scheuermann's disease constant pain it is but at least i get out now and again even if its just for a hour or so, with my detectors I BUILT and yes my electronics suff is my escape to when i can do it, if not i program the wife understands and my kids to 37 years of constant pain but hey im still here doing my stuff

[6666]

i feel such a fool now in telling people about this detectorist

Dave there is no reason to feel like that, this has been an interesting thread.

[daverave]

You also have to remember that depth measurements are somewhat subjective, especially in sand..... When you add in any personal bias to the results, you get the ultimate detector.

I guess people just want to boast and make others like me feel daunted....but i just dont want to play the game anymore ! i will try and do the best i can with the surf pi's that i have and also ive been using another pulse detector which is on loan to me and its such a great machine on the beach !!!maybe when things improve for me then i will try and get a tdi pro which is the ultimate machine to me and designed by the best designer in the world Eric Foster...i may also experiment with either the mirage or the mini pulse and see what results i can get.