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#1
08-16-2010, 09:00 AM
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Detector #2
Yeah, finally the next working detector.
 Constructing or inventing stuff really is hard work for the brain: How should it build best, where do I get the parts, best arrangement so further improvements or upgrades are possible, what is the real goal etc. etc. However - the new prototype is working: - very good transportable - uses human bionic energy - detects neon-tube from 10m - fading out ultrabright LED light - very directional target localization - signal output even if energy just low - made out of noble wooden box & handle - enough free space left for additional features 
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#3
08-16-2010, 11:06 AM
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Quote:
 !!Can we see inside?
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#4
08-16-2010, 07:32 PM
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dear funfinder i appreciate evervary other details, ?
may be contain an pistol?
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#6
08-18-2010, 06:55 PM
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wowwwwwwww funfinder your extrange perseverance obtain fruit, may congratulations brodhy
 :0
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#7
08-18-2010, 07:01 PM
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funfilder keep these away of cloners chinesse and suspicious geotech builders, may be the sceptics any day be convinced on lrl succes
too you keep far of listens
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#8
08-19-2010, 04:01 AM
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Guess I have to answer my question on my own...
btw. here are some interresting MD test results: http://metalldetektortest.eu/pageID_9307646.html
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#10
08-19-2010, 04:16 AM
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Quote:
but I'm not shure in making a big secret out of it... if I get overrolled by a truck today  (btw. gibon if you read here too: be careful not get slain by a coconut if you dig at those trees... - each year die dozens of people by falling down coconuts...) my inventions perhaps would be lost...But for shure I want something in return - at least information what MDs are really the best nowadays in finding deep small stuff, because for deep large objects I have already the Jeohunter. Perhaps I'll get myself the new Blisstool LTC64 - because I love Bulgaria and the price is fantastic!
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#11
08-22-2010, 12:55 PM
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circuit one - build and tested................... OK
circuit two - build and tested................... OK housing with handle ready....................... OK joining circuit one plus two...................... OK antenna one and two... build and tested... OK "connecting" antenna one and two........... OK final sensitivity checks............................ OK Q.C. passed........................................... OK elapsed time... over 30h takin' & posting pictures of device... soon
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#13
08-22-2010, 03:55 PM
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Yeah! Another successful work is finished!
This detector uses a very silent "threshold" noise and moving electrostatic loads in front of create different squeaking effects. Near the handle is the ground-contact for touching with a finger for even better gain. I'm already curious about the field-test! Phew! This was a nice piece of work and now the exciting part is beginning!
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#14
08-22-2010, 04:31 PM
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Quote:
 The scotch tape is effective for concealing the wire connections to prevent reverse engineering. Will the production model be built on a standard PCB or SMT? Best wishes, J_P
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#15
08-22-2010, 06:27 PM
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Schematic ??
So, do we get to see the schematic.
AND the test results ?? Goldfinder PS - Great to see someone doing something besides critisizing, and condeming what some else's ideas. Real progress we all hope for!
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#16
08-22-2010, 07:25 PM
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Great job.I like its simplicity.
Even if it doesn´t work, you may eventually find something with it. An it may help to say that it could work better with a microcontroller, even if you don´t know why. Please keep us informed with the results.
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#17
08-23-2010, 05:01 AM
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Quote:
, it's a quite cool design - I'm always happy if in the end I created something I'm liking, too - because when I start often I have no idea how and with which parts I should begin... The tape only is for isolation and stability and not to prevent reverse engineering. And I have to hurry creating the final schematic out of my mind otherwise the tape will prevent me of this... I guess standard pcb... smt could burn through...
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#18
08-23-2010, 05:05 AM
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Quote:
it works already with microcontrollers!
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#19
08-23-2010, 05:16 AM
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Quote:
And maybe also if someone really knowledged is willing to analyze what the circuit does... Because I'm not completly shure about this - seems it uses some kind of resonance circuit that only establishes under special circumstances - resulting in this very sensitive threshold noise. That shortcuted emitter-basis connection of T1 (see above) also is very important. Goldfinder, you're right, crizisizing is funny and easy, building such stuff alot serious work and "headache" if there occure unexpected problems - and those will... Now I understand much better why some metal detectors are a bit more expensive as flat screen LCDs etc. Developing such stuff devours a huge amount of time, work and nerves... 
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#20
08-23-2010, 05:57 AM
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Quote:
This made me think you used this kind of construction intentionally to minimize the conductor lengths, while saving time with circuit boards. I figured if you wanted to maintain the same short lead length on a production model, you would choose SMT. But these are harder to work with when hand-built, so a well-designed circuit board may work better. Actually this prototype construction method is not a bad idea. The last LRL construction I was involved with was wired with the same method. Too bad the circuit designer was banned from the forum before I finished the LRL. It was said to be good for detecting TVs from the couch, and static fields from a large distance. Best wishes, J_P
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#22
08-23-2010, 11:44 AM
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Quote:
People with no knowledge will give you more interesting answers about the principle, if you need names i may be of help.
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#23
08-23-2010, 01:19 PM
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Quote:
mikebg is probably among the best forum experimenters I can think of who is knowledgeable of how to design and optimize circuits for metal detecting. But I doubt he would be able to analyze what this circuit does or is intended to do other than to amplify something between a large metal plate, a coil and a finger on an emitter lead. Maybe a good starting point is to define exactly what kind of kind of field signal you want the circuit to detect or demodulate before enlisting help to analyze it. Or if that can't be done, then I think Fred has a good solution. Best wishes, J_P
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#24
08-23-2010, 04:17 PM
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funfinder, whit these strange project, stuff of extremely poor man in time of crisis, i remember the rudimentary laboratory of dr frankenstein
btw may brhy, the important is what these has function, you keep then far of evrentis-artemis ltd eyes, or soon you look you project in internet sales by pay pal you keep then top secret how today may congratulations, soon we seeing you tries videos?
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#25
08-23-2010, 06:38 PM
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may be same built tegnologie how funfinder designs jaajii
http://www.youtube.com/watch?v=lIsNH...eature=related
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