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#26
01-28-2018, 06:49 AM
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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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Geo 
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#30
01-29-2018, 04:45 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
01-29-2018, 05:00 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
01-29-2018, 06:07 AM
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 btw...congrats.. for your project.
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Geo
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#35
01-29-2018, 06:25 PM
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IR there is only to make the device more complex and to be convincing that it works 
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Geo
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#40
01-30-2018, 04:47 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
01-30-2018, 04:59 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
01-30-2018, 06:10 AM
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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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Geo
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#43
01-30-2018, 06:19 AM
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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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Geo
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#44
01-30-2018, 08:21 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
01-30-2018, 08:39 AM
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Position of the IR sensor on the Crypton OBMD-3 LRL device. Regards! Sneshko
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#47
01-30-2018, 01:42 PM
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Yes, its a decoration with a purpose.
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#50
01-30-2018, 04:55 PM
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But if there is or not.... same results. Nothing....
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Geo
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Linear Mode
