Blackhunter deepfinders reverse engineering

[mustefa ubram]

hi to all freinds
After a long wait, I acquired a Black Hunter device and prepared to reverse engineer.After opening the box, I was faced with a world of resin and epoxy that made access to the circuits impossible for me.However, since my friend insisted on reverse engineering this device, we decided to remove the epoxies.
Unfortunately, this work caused damage to Black Hunter, but we obtained some information from it, which I share here.
The heart of the Black Hunter device consists of a board Raspberry Pi and arduino deu.
The device is powered by 16lithium ion 3300 mAh batteries.In addition to the lithium battery protector, a separate set of charger circuits has been designed for this device, which is located under the upper panel
I will post photos of equipment and internal circuits for all friends. If anyone can think of a way to remove the epoxy and gain access to the circuitry please advise so we can completely reverse engineer this device and post it here and discuss it.The reinforcing parts of the device are completely buried in epoxy and are inaccessible

[Mike(Mont)]

Maybe Carl can help you.

[Pahom]

There is such a thing called Dimexide. Apply carefully with a brush and remove the resin layer by layer. If you don?t mind plastic, then fill it completely. Epoxy resin deteriorates quite well, plastic and paint deteriorate.Forgot to add. Do all actions under a hood.

[aft_72005]

why you want reverse engineering it?
it is digitally controlled oscillator . commercial trick !!!!!!
also with variable amplitude . there are some other circuits seem it. i did try lords with oscillator ... didn't work as a long range .

[mustefa ubram]

Originally Posted by aft_72005

why you want reverse engineering it?
it is digitally controlled oscillator . commercial trick !!!!!!
also with variable amplitude . there are some other circuits seem it. i did try lords with oscillator ... didn't work as a long range .

My dear friend, I have worked with many detector circuits, but I believe the Black Hunter was one of those long-range detectors that I was able to get good results from. I tried it on 5 unannounced buried targets and 4 points were good It revealed easily. In my opinion, Blackhunter is a different device than a digital oscillator and it can be used well for an exploration.I've reverse engineered a lot of circuits but none were resin sealed as hard as the Black Hunter.If I can reverse engineer the Blackhunter amplifier circuits, I will definitely share the information in this thread Of course, with this amount of resin, it is a little far from the antar.

[aft_72005]

Originally Posted by mustefa ubram

My dear friend, I have worked with many detector circuits, but I believe the Black Hunter was one of those long-range detectors that I was able to get good results from. I tried it on 5 unannounced buried targets and 4 points were good It revealed easily. In my opinion, Blackhunter is a different device than a digital oscillator and it can be used well for an exploration.I've reverse engineered a lot of circuits but none were resin sealed as hard as the Black Hunter.If I can reverse engineer the Blackhunter amplifier circuits, I will definitely share the information in this thread Of course, with this amount of resin, it is a little far from the antar.

was interesting ... are you did measure output frequency and amplitude for silver and gold ?
what was shape of wave ?

[mustefa ubram]

Originally Posted by aft_72005

was interesting ... are you did measure output frequency and amplitude for silver and gold ?
what was shape of wave ?

The interesting point of this device was not using output with fixed waveform and fixed amplitude.At first, it started with a square waveform, and in the time intervals between the beginning of Grand Balance and the end of Grand Balance, the waveform and the amplitude were constantly changing .The shape of the waves changed from a square to a sinusoid, then to a triangle, and then to the first square symmetry state.The frequencies were very different from the frequencies listed in the booklet, and only the start signal was the same as the one listed in the booklet.In the output part of the antenna, 4 inductors were used in the form of a Wheatstone bridge circuit.There is a very complex logic behind the operation of this device that I have not yet been able to understand.By connecting the antenna, the output power of the detector increases in a strange way
If I can get new information I will be sure to share

[mustefa ubram]

Originally Posted by Pahom

There is such a thing called Dimexide. Apply carefully with a brush and remove the resin layer by layer. If you don?t mind plastic, then fill it completely. Epoxy resin deteriorates quite well, plastic and paint deteriorate.Forgot to add. Do all actions under a hood.

Thank you very much freind
I will test this method