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What I need - a DIY deep search PI detector with auto ground balance or at least an inherent ability to work well in mineralized soil using a large PVC pipe single coil sled to search for deep nickel-iron meteorites. No discrimination needed. No LCD display needed, just audio feedback.
Why I need it - I want to search a few sites of obscure, single XX kg iron meteorite surface finds just for the fun of it in the hope that deep searches haven't been done. The odds of success are very low and since this is a very limited effort I want to spend as little as possible on the detecting equipment for this single use.
What I can do - etch double-sided PCBs, perform SMD assembly, test and calibrate with a variety of test equipment including an oscilloscope.
I have "Inside The Metal Detector - 2nd Edition" on order.
From reading here for a day I see these as a few of the candidates although none are specified for deep search and probably have a too-low-power pulse at too high a frequency (> XXX Hz) to be deep search capable:
Minipulse Plus Rev E
Geotech Baracuda
Hammerhead PI (I already have a Rev. D through-hole and C1 SMD PCB on-hand)
Are there any DIY suggestions for something else to use for deep search with a single large coil?
I assume that the limited nature of what I need could be done entirely with analog circuitry. However, I wonder if a pair of the readily available and cheap ESP32 modules to provide wireless feedback from the ESP32-based detector unit into the towing vehicle cab could be accomplished even with its limited 12 bit ADC considering that just detection and not discrimination is required. As far as I know, such a design doesn't currently exist.
From this post I gather that DIY microprocessor-based discrimination is forbidden anyway:
https://www.geotech1.com/forums/show...373#post283373
kt315: this forum is monitoring alltime by MINELAB. every second. any advanced high tech device will be banned via patent right in moment. so we CAN NOT do 'excellent machine'. you must learn QED story and do right conclusion. thats why we do just simplest analog projects, but effective. any PI device with discrimination micro-based with open code will be died.
MDfanatic's reply: So any Pulse Induction metal detector that includes a micro-controller and has (even partial) discrimination can not be built because of Minelab copyrights? It's like saying that a car manufacturer has the right to stop other car manufacturers from producing cars because they have 4 wheels and a steering wheel.
In the 2017 thread "Hammerhead Works but not detecting Deep"
https://www.geotech1.com/forums/show...643#post237643
Carl said:
"If you want performance, there are better public-domain designs available now and better construction techniques that will get you there."
Can you, Carl, or anyone else direct me to examples found here or elsewhere?
Why I need it - I want to search a few sites of obscure, single XX kg iron meteorite surface finds just for the fun of it in the hope that deep searches haven't been done. The odds of success are very low and since this is a very limited effort I want to spend as little as possible on the detecting equipment for this single use.
What I can do - etch double-sided PCBs, perform SMD assembly, test and calibrate with a variety of test equipment including an oscilloscope.
I have "Inside The Metal Detector - 2nd Edition" on order.
From reading here for a day I see these as a few of the candidates although none are specified for deep search and probably have a too-low-power pulse at too high a frequency (> XXX Hz) to be deep search capable:
Minipulse Plus Rev E
Geotech Baracuda
Hammerhead PI (I already have a Rev. D through-hole and C1 SMD PCB on-hand)
Are there any DIY suggestions for something else to use for deep search with a single large coil?
I assume that the limited nature of what I need could be done entirely with analog circuitry. However, I wonder if a pair of the readily available and cheap ESP32 modules to provide wireless feedback from the ESP32-based detector unit into the towing vehicle cab could be accomplished even with its limited 12 bit ADC considering that just detection and not discrimination is required. As far as I know, such a design doesn't currently exist.
From this post I gather that DIY microprocessor-based discrimination is forbidden anyway:
https://www.geotech1.com/forums/show...373#post283373
kt315: this forum is monitoring alltime by MINELAB. every second. any advanced high tech device will be banned via patent right in moment. so we CAN NOT do 'excellent machine'. you must learn QED story and do right conclusion. thats why we do just simplest analog projects, but effective. any PI device with discrimination micro-based with open code will be died.
MDfanatic's reply: So any Pulse Induction metal detector that includes a micro-controller and has (even partial) discrimination can not be built because of Minelab copyrights? It's like saying that a car manufacturer has the right to stop other car manufacturers from producing cars because they have 4 wheels and a steering wheel.
In the 2017 thread "Hammerhead Works but not detecting Deep"
https://www.geotech1.com/forums/show...643#post237643
Carl said:
"If you want performance, there are better public-domain designs available now and better construction techniques that will get you there."
Can you, Carl, or anyone else direct me to examples found here or elsewhere?
yes, i learned what is 'winter project' )))
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