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Offline dr.jare
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« Reply #20 on: July 27, 2011, 10:53:56 am »
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My acquaintance was made by Bulgarian PI. His conclusion is that the detector is slightly weaker than the Delta Puls but a lot easier to use. I am personally not interested in PI detectors for deep search (large objects at great depths of 2m-2,5m), because of the hard soil in my area ...

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Offline ramTopic starter
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« Reply #21 on: July 30, 2011, 08:39:42 am »
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Quote:Posted by dr.jare
My acquaintance was made by Bulgarian PI. His conclusion is that the detector is slightly weaker than the Delta Puls but a lot easier to use. I am personally not interested in PI detectors for deep search (large objects at great depths of 2m-2,5m), because of the hard soil in my area ...


you can modify the bulgarian pi for greater power than delta pulse. and delta pulse can be modified for greater power.

ram,

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Offline hamed_s
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« Reply #22 on: October 22, 2011, 02:33:34 am »
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hi ram
what is the exact data of drossel1 or bobin?
plz let me know about this chock.


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Offline fff
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« Reply #23 on: November 01, 2011, 02:39:43 pm »
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Replace drossel with the resistor 33 om.

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Offline deep max
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« Reply #24 on: December 27, 2011, 03:14:58 am »
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ok please help,i made bulgarian pi but have reaction only to 3pin ne5534,pin6 ne5534 have only
puls and no reaction for metal ,object maybe somewhere have little mistake on ne5534 stage? Undecided

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Offline xavier
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« Reply #25 on: December 28, 2011, 03:24:43 pm »
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Hi deep max

It is always a good idea to post some pics of your board so that the others may have a look, and with some luck see where you have gone wrong.

All the best
Xavier

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So many questions so little time
Offline deep max
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« Reply #26 on: January 31, 2012, 01:55:17 pm »
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hi xavier yes i post some pics for my board maybe tomorow, everything works only in ne5534 pin 6 out have a puls but no reaction for metal object Smiley

Posted on: December 28, 2011, 03:38:42 PM
ok guys, very hard connect this forum and reply maybe problem in server

Posted on: January 31, 2012, 01:44:53 PM
this is my sasho pi, please help.The signals is ok,voltage is ok,but after ne 5534 pin 6 have only pulse without reaction of metal, where the problem?













Posted on: January 31, 2012, 01:51:28 PM
i not atachet picture No no!

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Offline lazo
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« Reply #27 on: February 17, 2012, 12:19:26 pm »
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hi deep max Do you have this pcb sent mail thanks

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Offline fff
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« Reply #28 on: February 17, 2012, 12:40:48 pm »
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Check the supply voltage, +5 and - 5 volts at 7 and 4 pines ne 5534.With trimmer R3 adjust the voltage =-0.5volt on the pin 6.

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Offline deep max
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« Reply #29 on: February 17, 2012, 03:49:10 pm »
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thanks fff yes +5v. and -5v. are ok.I check with osciloscope pin 3 ne 5534 ok have pulse and detect metal object.But pin 6 ne5534 have only one big pulse and nothig reaction for metal object.Sound is ok. tresh potenciometer work.I dont now where the search problem, this is good design  pi detector respect fff Smiley

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