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hey folks im the new guy. i am quite lost when it comes to electronics. i can barley properly register my acount hahahah. i wish to build the accumeter from the schematics found on the schematics board but, aside from purchaseing all the goods i really do not know where to begin. any good books you can recomend on the mechanics of embarking on this type of "from scratch project"? do i need to etch a pc board? i did that in highschool and i know i can do trial and error but i really dont know where to start. and i do not want to spend 2-4k on a unit that has 75 dollars worth of radio shack parts in it. thanks much .
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The Accumeter is simple enough to build on perf board or Veroboard (strip board), using point-to-point soldering. Radio Shack has these. Or used to.
The problem with the Accumeter is the AC source. The Accumeter uses a DC-AC inverter, but does not use the 110vac output... it uses some intermediate internal 24v square wave... you'll need to know what you're doing to take this approach. Or, use a 24v transformer, as done in the Survey Meter article (same design as the Accumeter).
- Carl -
yea thats a good project probably to start with . like i said i am totaly green. i was just gunning for the accumeter as it has the 4 probes as opposed to the survey meter with two. is their anyway to add two more probes to the survey meter plans?Comment
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Yes... just make 2 more probes, and you're done!
Even though the Accumeter includes 4 probes, it only uses 2 at a time. You insert the 4 probes in the ground, and then set some switches to chose any 2 of them.
The Accumeter ($2995) really is the exact same circuit as the Survey Meter. So is Fitzgerald's "Mother Load [sic] Locator" ($2995), and Kellyco's GPLs ($3695 - $6450).
- CarlComment
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well heck that makes this whole deal a whole lot easier then. now my next questions.... do these things actually work? or is this a lrl type gimmick? shoulda asked that first . the concept seems plausable testing the resistance between the probes as long as i dont have to stick faceted quartz crystals in my ears and wait for a full moon . it sounds like they are a real technology.Comment
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No, not an LRL gimmick... earth resistivity is a legit method. But ERM has limited usefulness, which normally doesn't include looking for buried treasure, and is very tedious to use, especially if done manually.
ERM is normally used to map ground anomalies, including disturbed areas and hidden caves. It probably won't detect a buried metal target like a coffee can full of gold coins. And a true 4-probe data-logging design is much better than these cheesy 2-probe units.
- CarlComment
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4 PROBE DATA LOGGER is that the item that lrlman sells that i have been seening you guys talk about? i have a whites two box . how does that work together?Originally posted by Carl-NCComment
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xr 71 p
hi
i build sniffer xr_71p.but this circuit is unstable . this circuit have very parasite . i think that this unstable is from coil & type capacitance. i use from polyester
capacitance .is effective using other type capacitance example tantaniom??????????? .please you tell to me that i what work for this problem????????????
i will a large coil for sniffer xr_71p like delta pulse (110cm _110cm). please help to me that i use from what wire and many turn this coil . until whit this coil sniffer had ustabl.
please help to me . wait for ask you. tank you
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