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  #51  
Old 01-30-2018, 07:34 PM
dragomir dragomir is offline
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Something did not happen with the upload
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  #52  
Old 01-30-2018, 07:51 PM
abdou2014 abdou2014 is offline
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It is necessary to reduce the file size, save it in GIF format. thank you Geo for all, I made tons of experiments and I s......d
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  #53  
Old 01-31-2018, 03:58 AM
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Please show to us your experiment...
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  #54  
Old 01-31-2018, 05:24 AM
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Dragomir constructed a very goog clone, i have two photos from it.
Dragomir if you would like i can post the photos here...
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  #55  
Old 01-31-2018, 05:40 AM
dragomir dragomir is offline
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Ok
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  #56  
Old 01-31-2018, 11:59 AM
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I post here 2 photos from a OBMD1 constucted by Dragomir.

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  #57  
Old 01-31-2018, 12:20 PM
abdou2014 abdou2014 is offline
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I think the andreas preamp is less reliable
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  #58  
Old 01-31-2018, 01:21 PM
abdou2014 abdou2014 is offline
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Very nice work Dragomir
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  #59  
Old 01-31-2018, 02:10 PM
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Very nice...will it really work in the field?
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  #60  
Old 01-31-2018, 03:02 PM
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I don't think
Before some years a friend gave me one oBMD1 for one week.
I went at some ancient places for test.
No one beep

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  #61  
Old 01-31-2018, 03:40 PM
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Dragomir.. if you have other photos to post here send them to my email and i will resize and attach them here
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  #62  
Old 01-31-2018, 05:52 PM
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Quote:
Originally Posted by Geo View Post
Part list next week. My opinion is that the IR iss doing NOTHING so you can find the value from other parts at Andy Flind thread.
Dear Geo!
This week passes ... You promised Part List for the scheme you set ...
I do not want to offend you - I'm just a little impatient...
Regards!
Sneshko
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  #63  
Old 01-31-2018, 06:30 PM
dragomir dragomir is offline
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This project has been frozen for 6 years. The device is working in general, but I could not handle its settings. Can anyone tell me what frequency does the receiver and the induction oscillator work?
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  #64  
Old 01-31-2018, 06:38 PM
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Here another photo from this beautifull lrl by Dragomir...
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  #65  
Old 01-31-2018, 06:43 PM
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Dear Geo!
This week passes ... You promised Part List for the scheme you set ...
I do not want to offend you - I'm just a little impatient...
Regards!
Sneshko
Sorry i am busy.
I started to write and did let it...
Today morning i updated the schematic with parts but only for IR section, beeper and preamplifier. All the other are the same from Andy Flind magnetic field detector. So maybe tomorrow i will check it again and will post it here....
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  #66  
Old 01-31-2018, 06:44 PM
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This project has been frozen for 6 years. The device is working in general, but I could not handle its settings. Can anyone tell me what frequency does the receiver and the induction oscillator work?
What do you mean induction oscillator???
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  #67  
Old 01-31-2018, 09:08 PM
abdou2014 abdou2014 is offline
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Mr Dragomir , can you detect magnet with your LRL ?
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  #68  
Old 02-01-2018, 04:26 AM
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There is no induction oscillator in crypton OBMD. It is purely a passive LRL...
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  #69  
Old 02-01-2018, 05:35 AM
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There is no induction oscillator in crypton OBMD. It is purely a passive LRL...
I agree, this is the reason that i asked Dragomir...
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  #70  
Old 02-01-2018, 06:04 AM
dragomir dragomir is offline
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the infrared sensor controls the power supply of the IC7. IC7 acts as an excitation generator and is inductively mixed with the signal received by the receiving coil.
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  #71  
Old 02-01-2018, 06:36 AM
abdou2014 abdou2014 is offline
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I think it's the mixing point between IR oscillator excitement and receiver ?

dragomir I had no answer ???
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  #72  
Old 02-01-2018, 08:07 AM
dragomir dragomir is offline
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The IR manages a transistor that turns on and off the power supply of IC7. The IR does not participate in any process. When the device box opens, it blocks the operation of the IC7 and the excitation generator stops working. This is probably done so that the principle of operation can not be traced when the device opens.
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  #73  
Old 02-01-2018, 08:16 AM
dragomir dragomir is offline
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abdou2014 i think this is the oscillating antenna but this is done for you in another way
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  #74  
Old 02-01-2018, 08:45 AM
abdou2014 abdou2014 is offline
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Mr Dragomir , can you detect magnet with your LRL ?
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  #75  
Old 02-01-2018, 09:23 AM
dragomir dragomir is offline
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My LRL does not work because I do not know how to set it up. I remember detecting a 3-meter monitor, but it works only as a receiver without the excitation generator. now, if I remain free, I can experiment with it
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