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  #26  
Old 01-28-2018, 07:49 AM
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Ha, ha...! Very good Geo!
Thanks!
...Аnd, Is this PCB from OMBD-1 or 2 ???
Thank you in advance for the answer!
Regards!
Sneshko
The pcb photo is the first pcb for OBMD1.
Constructor had attach to a Greek forum.
Look at top where is writes "antenna". It uses this track as antenna and this is what shows at schematic as coil with critical null
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  #27  
Old 01-28-2018, 12:35 PM
abdou2014 abdou2014 is offline
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Is it a coil stimulator, what are the values, can we know more about the IR sensor ?
Thank you !
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  #28  
Old 01-28-2018, 02:34 PM
dragomir dragomir is offline
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I feel like this infrared sensor is used to protect against opening the box.
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  #29  
Old 01-28-2018, 09:44 PM
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Geo, I did not see the second antenna in the picture
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  #30  
Old 01-29-2018, 05:45 AM
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The second antenna is not a coil, it is a in a form of a trace in the pcb(worded ANTENNA), it is connected to the input of the main coil via capacitor. This antenna is dependent on the PIR sensor. Look at the picture in the first page on this thread...
I have a complete schematic, pcb for this project...
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  #31  
Old 01-29-2018, 06:00 AM
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here is my project...this is based on the schematic posted in the forum...crypton clone.
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  #32  
Old 01-29-2018, 07:07 AM
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Originally Posted by GOLDEN LILLY View Post
The second antenna is not a coil, it is a in a form of a trace in the pcb(worded ANTENNA), it is connected to the input of the main coil via capacitor. This antenna is dependent on the PIR sensor. Look at the picture in the first page on this thread...
I have a complete schematic, pcb for this project...
Yes, you are right...

btw...congrats.. for your project.
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  #33  
Old 01-29-2018, 07:16 AM
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I need your help Geo !
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  #34  
Old 01-29-2018, 09:10 AM
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GOLDEN LILL Yhow is the role of the infrared sensor when it is enclosed in the box?
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  #35  
Old 01-29-2018, 07:25 PM
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GOLDEN LILL Yhow is the role of the infrared sensor when it is enclosed in the box?
No role, it don't work.
IR there is only to make the device more complex and to be convincing that it works

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  #36  
Old 01-29-2018, 07:26 PM
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I need your help Geo !

I hear.....
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  #37  
Old 01-29-2018, 09:25 PM
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It soon blocks the operation of the device when opened
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  #38  
Old 01-29-2018, 10:01 PM
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The audio stage does not work, I think there is an error ???
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  #39  
Old 01-29-2018, 11:51 PM
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Your circuit and the original are not the same, I need values of your circuit, thank you Geo!
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  #40  
Old 01-30-2018, 05:47 AM
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Of course it is not the same. The circuit drawn by Geo is a modification from the original circuit of Andy Flind. In the original circuit, the 4016 directly drives the buzzer but in the modification, the same 4016 drives a tone generator using 555 ic...
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  #41  
Old 01-30-2018, 05:59 AM
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The PIR sensor is not inside the enclosure it is positioned at the back of the unit facing towards the area to be detected. Even without the IR, the device will still function. I think the IR senses a slight change in the surrounding temperature. Take note that a metal buried near the surface absorbs heat from the sun during daylight. This maybe the reason why crypton will detect near surface buried metals at night.
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  #42  
Old 01-30-2018, 07:10 AM
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Your circuit and the original are not the same, I need values of your circuit, thank you Geo!
The circuit is exactly the same.
4016 and 4066 are quad switch ICs, so no problem if you will use the 1st switch or 2nd etc....
The schematics have diference only at pins, nothing else.
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  #43  
Old 01-30-2018, 07:19 AM
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Originally Posted by GOLDEN LILLY View Post
The PIR sensor is not inside the enclosure it is positioned at the back of the unit facing towards the area to be detected. Even without the IR, the device will still function. I think the IR senses a slight change in the surrounding temperature. Take note that a metal buried near the surface absorbs heat from the sun during daylight. This maybe the reason why crypton will detect near surface buried metals at night.
IR is a trick, it don't do anything.
When you make a lrl with purpose to sell it then you try to protect it from copies (at least from amateurs). One way is to make it very complex. It is the recipe by Mineoro...
So works only one module (IF IT WORKS) all the other doing NOTHING.
The same here is happenng with IR.
The same is happening at Cryfton OBMD-3 with Ion detector and GOLD SENSOR etc...

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  #44  
Old 01-30-2018, 09:21 AM
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I check it's still wrong, when I approach the transmitter the LED lights up all alone, and when I get closer than the buzzer produces a weak sound .
I think it's not normal that the VU alone displays before (CA3130 + 4016 + NE555)
what do you mean by an error in this post Geo ?
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  #45  
Old 01-30-2018, 09:39 AM
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GOLDEN LILL Yhow is the role of the infrared sensor when it is enclosed in the box?
Dear friends!
Position of the IR sensor on the Crypton OBMD-3 LRL device.
Regards!
Sneshko
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  #46  
Old 01-30-2018, 11:48 AM
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Dear friends!
Position of the IR sensor on the Crypton OBMD-3 LRL device.
Regards!
Sneshko
This I think is purely aesthetic decoration
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  #47  
Old 01-30-2018, 02:42 PM
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Yes, its a decoration with a purpose.
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  #48  
Old 01-30-2018, 05:34 PM
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This is my project and infrared sensor is inside
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  #49  
Old 01-30-2018, 05:45 PM
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Hi Dragomir.
Your photo is not visible.....
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  #50  
Old 01-30-2018, 05:55 PM
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Dear friends!
Position of the IR sensor on the Crypton OBMD-3 LRL device.
Regards!
Sneshko
At obmd3 there isn't IR.
But if there is or not.... same results. Nothing....
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