Damping Resistor waveforms for Pulse Induction metal detector

[@B.Cote39]

Certainly the best most in depth explanations I have found yet . Than k you 🙏

[@SurfDetector]

You are welcome. I am glad that my videos are helpful to you.

[@aa1ww]

Thanks for giving visual description to this process. Have a great new year.

[@SurfDetector]

I am glad that you found the video to be instructive. Happy New Year.

[@JJJAMES444]

Thanks for the great explanation, very interesting look at the internal electronics.

[@SurfDetector]

Thanks for the comment and your support, I always appreciate it when you take time to watch a video of mine. I wish that I could build a SDC 2300 :) Merry Christmas

[@JJJAMES444]

Surf Detector Merry Christmas Santa Claus better have an SDC on your doorstep Christmas morning👍👍👍. I dug up 65 cell phones they covered the whole cost of the SDC. I’m in CA we still have a ton of gold claims to hunt. Hopefully we can get the sdc on some tailings, and hit some pure gold.

[@22koga]

thank you very valuable info for me right now keep up the great work !

[@SurfDetector]

Good to hear that it was of interest.

[@mohamed-89_06]

Thank you very much.

[@SurfDetector]

You are welcome.

[@noimnotarobotcanubeleiveit7024]

is there a practical power limit to the output of a PI detector? would a bigger mosfet and thicker coil on a high voltage rail and capacitor bank give more practical range? legal constraints aside. are phased arrays a thing in detecting?

[@SurfDetector]

Unfortunately bigger is not always a good thing. You quickly run into diminishing returns. Depending what you are looking for you can increase your coil size but then you loose sensitivity to smaller objects. Phased arrays as far as I know are not used in metal detecting.

[@mohamed-89_06]

Hi. Where you connected the oscilloscope pins to see that wave 👋

[@SurfDetector]

You need to connect to the output of the preamp.

[@mohamed-89_06]

For example in pi polones.pin 3 of lf 357. Am I alright 👍

[@SurfDetector]

@@mohamed-89_06 My friend, watch my Polones preamp video , I think that I show it there.

[@mohamed-89_06]

Thanks 😊

[@SurfDetector]

@@mohamed-89_06 Pin 6

[@نورسليمان-ش3ث]

أستاذي الكريم هل تقصد بوضع مقاومة تخميد متغيرة مكان المقاومة الثابتة والتجريب حتى نحصل على أفضل نتيجة لكشف الذهب

[@SurfDetector]

You need to use the oscilloscope to get the correct wave form as I show in the video in order to tune the detector to the coil. You must adjust your sample delay in order to find the different metals better.

[@jweleyalzintanlibya]

Is it possible to add a self-adjusting damping resistance? So that it automatically adjusts to any coil that is placed, even if the inductance and resistance increase or decrease I think it exists, right?

[@MORAL1952]

Hi Would you have the Fourier transform of your signal with and without metal in the coil field? I would like to know what the signal frequency range would be. It may be possible to filter the useful signal a little from the total signal. With a narrower range, it might be possible to increase the sensitivity of the useful signal. Thanks

[@SurfDetector]

Hello my friend, I do not have the Fourier transform recorded. Keep in mind that the video you are commenting on is strictly illustrating how to choose the correct damping resistor value. Thanks for watching.

[@Mohamedhamid-hc8ov]

hello, i can't afford a professional oscilloscope so i need your advice, if dso 152 mini oscilloscope is good to do this job with?? , thank you very much that was great job , may god save you and your family 😊

[@SurfDetector]

I am not familiar with the oscilloscope that you are referencing.

[@Abedjuc_85]

Hello friend. Thank you again for your helpful video's. So how to increase the value above 1.6 . Which one can I change?

[@SurfDetector]

Hello, I do not understand your question. What value are you asking about?

[@emmanuel_ac]

Hola! ¿Cual seria el diagrama de conexión para realizar esta prueba? Muy interesante información!

[@SurfDetector]

Hello my friend, Is this what you are looking for? kzbin.info/www/bejne/eaOtZqd8e9KKr9E

[@SurfDetector]

Hello my friend, Is this what you are looking for? kzbin.info/www/bejne/eaOtZqd8e9KKr9E

[@emmanuel_ac]

@@SurfDetector Yo me refiero al conexionado previo, es decir como excitas la bobina para este ensayo en particular, y sobre qué componente estas midiendo con el osciloscopio. Es el tipico circuito del detector por induccion de pulso con 555, fet, y operacionales? Saludos y gracias.

[@SurfDetector]

You are driving the coil for this test with the TX portion of the PI machine. You attach the oscilloscope probes to the output of the pre-amp to see this waveform. I hope that answers your question.

[@emmanuel_ac]

@@SurfDetector yes, thank you bro

[@depthspader8820]

Interesting stuff. All the best in 2021.👍👍

[@SurfDetector]

Thanks for the comment. I get a lot of satisfaction from using detectors that I have put together myself.

[@depthspader8820]

that's very cool, and I can see why it would be satisfying. Maybe we will see a Surf Detector on the market one day!!!

[@احمدعبدالعاطى-ق8ل]

Hello! I am Ahmed from Alexandria, Egypt I made Surfmaster But he It does not detect gold It does not detect gold But he doesn't discover gold. Do you have an explanation?please

[@SurfDetector]

Hello Ahmed, I think that probably the sample pulse delay of your detector is too high. For gold you should be

[@احمدعبدالعاطى-ق8ل]

@@SurfDetector Thanks for your quick response Yes, I watched all of your videos over and over again And the explanation is fun thank you I have a question for you Is there a problem with the Geotech website? It has not opened for me for three days Do you have a page on Facebook

[@donizetesilva01]

Great video 👍👍👍👍

[@SurfDetector]

Glad you enjoyed it

[@mu8502]

hey my friend.ihave a question is there anyway to get a huge magnetic field (with a special coil for pulse induction like helmholtz coils or other)??????

[@SurfDetector]

Thank you for watching my friend, I hope that you will subscribe. What detector are you building?

[@mu8502]

@@SurfDetectorI am building a pulse induction that designed by me 0to100 and have very good performance but have a problem when my coil is bigger like 1 to 1 meter square coil output signal from lf357n ic is very very noisy I used single power for lf357n (12volt) what is it causes?please help me

[@SurfDetector]

What you need to do is post your circuit and question on the Geotech Forum. Without seeing the circuit and without knowing all of the information their is no way that anyone is going to be able to help you to diagnose your problem my friend. Please post all of your information to the Geotech Forum.

[@mu8502]

@@SurfDetector Hi my friend, I solved the noise problem. The last problem I have is making a 1 by 1 meter coil that has a larger field than a normal coil. As you know, any coil can be used with any pulse device. Some time ago, you released a video that was In the case of dual field coils. Can it be made similar for larger coils(1by1 meter)? and do they have effect on depth really?

[@SurfDetector]

@@mu8502 You can certainly make a larger Dual Field coil although you will need to experiment to get the measurements correct. I am interested to see your circuit. Please post it to Geotech.

[@ابوعليالعراقي-ح8ذ]

Can the value of a 100k variable resistor be increased to a 200k blue resistor for 10 cycles?

[@SurfDetector]

I don't understand your question. What does this have to do with Damping Resistor waveforms?

[@winstonsmith478]

So, for the deep detection using a LARGE mono-coil of large nickel/iron meteorites (and that is ALL I'm looking for) with their much lower conductivity than gold, would the low-resistance overdamping ("overdamping" when looking for gold) be preferable for any reason? I also have a Hammerhead version D1 PCB to build.

[@SurfDetector]

Each coil will need to be attached to the detector and then critically damped. The wave form does not vary according to the material that you are searching for.

[@mattrowe1229]

I dont see on your scope 360 ohms, or are you using the graph boxes on the scope, how do we arrive at the proper ohms value, i had a member from Geo send me a brand new voodoo manual because he decided not to build, plus he sent me a brand new ITMD book as well for Christmas, all free, nice present for me. Thanks for the vids, i figured you would have it up today, so i stopped buy.

[@SurfDetector]

Hi Matt, The ohm value does not come from the oscilloscope as it does not measure ohms. I was just commenting. What you do is use the jig and then when you have the correct wave-form you disconnect the jig from the circuit and then attach it to your multimeter to measure the value. Good news about the book. There is a lot of good information in there for you. If you click on the "Bell" button next to the "subscribed" button on the video then you will get all notifications as to when I have posted a new video. Merry Christmas to you and your family.

[@mattrowe1229]

@@SurfDetector ok, will do that now for notification now i know how to measure the ohms, great vid again, have a great christmas and new year matt

[@tariqal-khawaldah590]

How we can do something like that to know the best damping resistor without having ocelecscope

[@SurfDetector]

Hello my friend, in order to build metal detectors properly you really need to use an oscilloscope. Otherwise you are just guessing.

[@moristo]

Marry Christmas sir.

[@SurfDetector]

Selamat hari natal untukmu

[@moristo]

@@SurfDetector Terima kasih, Tuhan Yesus memberkati anda dan keluarga anda.

[@coincollectingfun]

So cool 😎

[@coincollectingfun]

Smashed the like button with a hammer 🔨

[@SurfDetector]

Glad to hear that you liked it.

[@SingingForTheCreator]

Thumbz up🙋

[@SurfDetector]

Thanks for the visit

[@MoistyReacts]

xin chào good luck friend ...♥♥♥🎣🙏

[@SurfDetector]

chào mừng và cảm ơn bạn đã xem

[@diggersdentysonu.k.m.d8813]

Marry Christmas my brother top vifeo a big big thumbs 👍 from me have a top day and In joy my brother tyson fury

[@SurfDetector]

Happy Christmas to you and your family Terry. Stay safe my friend.

[@NoMundoDeErick]

Vídeo good Nice

[@SurfDetector]

Happy Hunting my friend :)

[@David_11111]

yay but I think I need some help here :)

[@luxurywavesceylon1563]

ㄥㄖᐯ乇 ! 千尺ㄖ爪 🇱🇰 👍 ! ɐɐɥ ǝɔᴉN

[@SurfDetector]

Thank you for watching.