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Offline Noro
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« Reply #40 on: December 21, 2013, 06:44:40 am »
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R56- 56 K TO 100K TO FINE RANGE FOR PONTETIOMERER 22K

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Offline Homefire
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« Reply #41 on: December 21, 2013, 09:55:21 am »
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Quote:Posted by Noro
Huh? if you read the topic will enlighten you, at least it works, but somewhat lower detection than other schemes, but the last sentence inpolemica not get yours ...

Posted on: December 20, 2013, 11:20:34 am
if you make a plan and discuss it pate that it will not be perfect
but at least you strive to do and learn
introduction in error not me, and those who want to try are welcome
criticism over a lot ... and that kind of leaves me cold discussions


Not Critic on your post just stating points of what is better.  If the Schematic is Dubious or not proven just say so!  We have a pile of folks that Reverse engineer schematics from a machine and Not being able to find required parts end up Substituting the Substitute with other parts that just don't work.  I am not and will not EVER dog you for posting what you know.   Just trying to keep the Forum clear and Working .   That's my job as a Moderator.   Cool

Posted on: December 21, 2013, 09:47:12 am
I'm thinking we need a better translator.   I know what your trying to say but some of it is Side Ways or Back Wards.  LOL

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« Reply #42 on: December 21, 2013, 10:04:54 am »
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wiring, I did, and tracks follow should be planted in the coming days

Posted on: December 21, 2013, 10:02:27 am
wiring, I did, and the pieces to be planted in the coming days (for slow metal detector)

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Fisher 1280X and others, also DIY
« Reply #43 on: December 25, 2013, 09:04:58 am »
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aT FIRST; i WISH YOU A mERRY cHRISTMAS AND A V:G: AND STABLE HEALTH FOR THE nEW yEAR:

My question to you is, if it is possible, to get a PCB-picture and PCB-layer. This, because I am not firm with f.e. Eagle and other Layout-Designers. I have to learn them at first but don`t want to begin with a complex circuit like yours.
Looking foreward and thanks a lot of the hell, Andreas Gatowski from germany. Would be great, if you send the files to gerngesehen@gmx.de
Best wishes, Andrew



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« Reply #44 on: December 27, 2013, 12:41:29 pm »
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Hi Andrew

First let me welcome you to the forum.
If you are planning to build metal detectors and the likes you may as well get started and do it yourself with a PCB, Schematic designing program. You can download a fully working program with NO limitations from here.

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http://designspark.com/eng/page/DesignSpark-PCB-Home-Page
   they also have another free program called designSparkMechanical it's free and fully functional with NO limitations.

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Xavier

Posted on: December 27, 2013, 07:38:29 pm
I must say that I haven't quite figured out why a 7555 timer is being used in this design.

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« Reply #45 on: December 30, 2013, 06:42:51 pm »
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happy new year for all !

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Offline xavier
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« Reply #46 on: December 31, 2013, 11:56:28 am »
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Thanks Noro

And may 2014 be a good year for you.

Regards
Xavier

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« Reply #47 on: January 12, 2014, 01:52:37 pm »
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Hi Xavier ,almost finis to planted component ,tell my please 2sk170 is compatible to j112?
because according to the survey on the Internet would be the closest j122.
2sk170 command not found in our country.
problems are likely 12nf C24 values ​​and R2 680K as you probably noticed by your poor image resolution
thank Noro

Posted on: January 12, 2014, 01:50:49 pm
sorry R 51 probabil 680k (not R 2!)

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« Reply #48 on: January 12, 2014, 04:47:03 pm »
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The J112 is a switching J-FET where the 2SK170 in an audio amplifier so if it were me I would not use it.

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Xavier

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« Reply #49 on: January 23, 2014, 02:16:17 pm »
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hi Xavier ,first scheme works without adjustments, currently with low sensitivity.
follows in the next few days to adjust to a high sensitivity (if they succeed!)
last ICs are tlc 272
I put the assembly FET transistors, is to see if they can replace

regards Noro

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