Voodoo Main Discussion

[MartinB]

I used the Fisher F75 coil for my project and I noticed the same thing.

Probably will not bother buying the coil for a while.

[Bartmanzl]

Newbie question, Just found this amazing site and project has anyone tried detecting with the Voodoo on black sand/Ironsand beaches? I've recently built a Arduino Nano PI detector and it works OK, but it has no chance on the sand around here that has been mined for years for its Iron content, also I'd prefer to build one than spend $$$ buying one.....Thanks Bart

[dfbowers]

I am using a home built concentric. Around 7mH for the RX coil and 300uH for the TX. Same coil I used for my own Hybrid, where TX and RX sensitivity are about the same.

[Qiaozhi]

Newbie question, Just found this amazing site and project has anyone tried detecting with the Voodoo on black sand/Ironsand beaches? I've recently built a Arduino Nano PI detector and it works OK, but it has no chance on the sand around here that has been mined for years for its Iron content, also I'd prefer to build one than spend $$$ buying one.....Thanks Bart

Voodoo is more tolerate of non-homogeneous mineralized ground than a VLF detector, but (like a VLF) the DISC channel is still affected. If you don't need ferrous/non-ferrous discrimination, then the Mirage may be a better bet as it includes ground balancing.
It would be possible to modify Voodoo to include ground balancing for situations where the ground is heavily mineralized, but it doesn't have that capability at the moment. Voodoo is designed for use on the beach and inland, but not for the ghastly ground conditions found in Australia.

[MartyJ1963]

Hiya George, Regarding with what you mentioned about the Mirage, which version of it includes Ground balancing? Or is it every version? I never knew this and have built 3 different versions of the Mirage. Thanks, Regards, Marty.

[Qiaozhi]

Hiya George, Regarding with what you mentioned about the Mirage, which version of it includes Ground balancing? Or is it every version? I never knew this and have built 3 different versions of the Mirage. Thanks, Regards, Marty.

Hi Marty,

For some reason I've always assumed the Mirage included ground balance, but it appears that I was wrong.
Perhaps an alternative would be to look at waltr's modified HH2 -> https://www.geotech1.com/forums/show...ake-on-the-HH2

[MartyJ1963]

Thanks George,,,,No probs. I built Svens original then the last revision he did, then Elliots version. I thought I was missing something when you mentioned it had 'Ground balance',,Lol. I've stll got my coil to build yet for my Voodoo but got a lot of things going on at the moment. I thought I'd practise at bettering my building/Tuning skills on VLF coils for my TGSL and IDX first before attempting the Voodoo. All my Home built VLF's work but I haven't yet conquered building a field worthy working coil for them yet! Lol,,but it's on my bucket list to eventually get right as well as properly learn my Oscilloscope! Thanks for the info, Rgeards, Marty.

[Bartmanzl]

Voodoo is more tolerate of non-homogeneous mineralized ground than a VLF detector, but (like a VLF) the DISC channel is still affected. If you don't need ferrous/non-ferrous discrimination, then the Mirage may be a better bet as it includes ground balancing.
It would be possible to modify Voodoo to include ground balancing for situations where the ground is heavily mineralized, but it doesn't have that capability at the moment. Voodoo is designed for use on the beach and inland, but not for the ghastly ground conditions found in Australia.

Ok, thanks for that
Regards
Bart

[scrungy_doolittle]

PICS are good processors, though I only really like the PIC24 family. I hate most of them, whoever heard of a 12 bit address and a 6 bit byte.
PICS do program pretty easily.

[Voyager]

Happy new year to everyone on the forum, it's always relaxing here to visit and get to know the differences opinions discussed in this great forum, thanks for everyone's "availability to help" when I needed it, thanks especially to the project's developer (finished now) and to surfdetector for having available and instructive videos and good continuation. MAY THE GRACE OF GOD COVER YOUR FAMILIES! (for those who want to believe!?.

[kemoli]

dear friends, has anyone tried the voodoo detector in the field?

[electrosoft]

Hi everyone
sincerely very good and complet projects congratulatin to Qiaozhi, i already made the pcb but i cant find the mosfet FQT7N10 in my country and i cant buy from internet any suitable equivalent ? like irf510 ? Thanks BR!

[Qiaozhi]

That part of the circuit is for protection against reverse polarity on the battery pack.
You can decide to short it out as long as you don't connect the battery the wrong way round.

[electrosoft]

Hi everyone sincerely very good and complet projects congratulatin to Qiaozhi, i already made the pcb but i cant find the mosfet FQT7N10 in my country and i cant buy from internet any suitable equivalent ? like irf510 ? Thanks BR!


Thanks for quick replay BR!

[ihatesanity]

I just wanted to say thanks to George for his hard work on this project! I'll be ordering the book in my next Amazon order, and the boards in my next order from JLCPCB.