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Yes of course , this one may also have a different audio response on the iron that there is no sound or to have two tons or to leave a trace like gpx I will post a video these days , and I listed the TDI because the sound is nice and quiet threshold he also has some advantages in some situations.. In the first test at 20 euro cents I am quite happy with the depth the money is buried at 35 cm and detects it very easily the field where I test is full of iron waste, all the iron is discarded without any problems..I won't have time at the moment, but maybe I'll put TDI audio on this detector over the winter.
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Here's an example of how the pulse detector I mentioned works Puls hibrid ..
https://www.youtube.com/watch?v=GcetnZxV5w0
https://www.youtube.com/watch?v=xsy4Cl7KyKEComment
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Nice work Orbit!
Can it ground balance also?Comment
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Hi Altra !That it is completely calm has also been tested on the beach and in heavily mineralized areas he works completely calmly everywhere works with all minelab coils dd and mono as well as with the explorer coil ...Balancing works without problems!It can also have audio sound like minelab but to be quick it has this sound...Originally posted by Altra View PostComment
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Hey Orbit, what coil are you using in your videos? Thanks!Comment
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Thanks!Comment
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Orbit - if you want to develop a discussion on your detector, it would be advisable to start your own thread, as this particular thread is intended for discussions involving the Voodoo detector.Originally posted by Orbit View PostComment
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It's not a problem, I won't write anything on this topic ! It is not my intention to raise any topics... Cheers!Originally posted by Qiaozhi View Post
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Synchronous Demodulator RC values
Hi George,
Looking at the synchronous demodulator RC values of 22K and 470nF, aren't you severely limiting the gain?
Correct me if I'm not understanding this correctly but with a smallish coil (say 8 inches diameter) we can expect the target to be under the coil for around 100mSec or so.
With a PI sampling pulse width of 60uSec and the time constant of 22K/470nF at around 10mSec, this would need approximately 167 samples (or 167mSec with 1mSec pulse rate) to fully transfer the preamp output voltage to the 470nF capacitor. Wouldn't it be better to do this in at least half the time the target is under the coil (or around 50mSec) by changing the resistor value to 6K8 or thereabouts?
I may have this totally wrong or there may be other factors at play that I'm not seeing, please set me straight if that is so.
Totally loving the Voodoo project but still trying to understand it fully, my book is getting quite dog-eared in the process.
Kind regards,
OllyComment
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The difference between Voodoo and a standard PI is that the filter channels are double-differentiating, which has the side-effect of making the detector more susceptible to noise. Hence values were chosen for the R and C values in the sample gates to reduce noise entering the filter stages. With 22k and 470nF, the low-pass cut-off frequency is 15.4Hz. I did experiment with different values, but found that these gave the best results.Originally posted by Olly View Post
However, please feel free to experiment.
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Thanks for explaining, I'll have a little play in the labOriginally posted by Qiaozhi View PostThe difference between Voodoo and a standard PI is that the filter channels are double-differentiating, which has the side-effect of making the detector more susceptible to noise. Hence values were chosen for the R and C values in the sample gates to reduce noise entering the filter stages. With 22k and 470nF, the low-pass cut-off frequency is 15.4Hz. I did experiment with different values, but found that these gave the best results.
However, please feel free to experiment.
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Voodoo Schematic available on forum?Comment
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The Voodoo schematics are not available on the forum. You can purchase the book from here ->
https://www.amazon.com/Voodoo-Projec...s=books&sr=1-1
It is also available from Amazon websites worldwide, and from booksellers.Comment
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bom dia a todos !
Bom dia a todos, interesantissimo esse projeto, espero ver um video deste em acao quando estiver pronto.Comment
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