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  #1551  
Old 03-08-2017, 10:13 AM
FrancoItaly FrancoItaly is offline
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As I said 8 m are a good distance that proof that the LRL works well. You can increase the DC gain of the amplifier, by changing R1 from 150K to 56K, R2 from 220K to 470K and changing the value of the voltage divider R3 / R4 / R5 / R6, try R3 = 15K, R4 = R5 = 3.3K, R6 = 4.7K or R3 = 18K, R4 = R5 = 2.2K, R6 = 4.7K. In this way, the LEDs (2 and 3) are switched on with a lower voltage.

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  #1552  
Old 03-08-2017, 08:09 PM
sakher sakher is offline
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Default water!

Hello Mr. Franco

Through my experiences I think this device is sensitive to stream of water
But I did not dig to make sure
what do you think?
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  #1553  
Old 03-09-2017, 09:53 AM
FrancoItaly FrancoItaly is offline
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It never happened, but it could happen if the stream has a particular orientation with respect to the axis north / south.
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  #1554  
Old 03-13-2017, 09:04 AM
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ayoni03 ayoni03 is offline
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Default 8 mhz sensor stage and pic16f876

hi Franco

What's your idea...
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File Type: pdf franco sensor sensitive led bar pic16f876.PDF (24.7 KB, 150 views)
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  #1555  
Old 03-13-2017, 09:16 AM
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Default rar

try
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  #1556  
Old 03-13-2017, 10:54 AM
FrancoItaly FrancoItaly is offline
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Good job, in the past I have used a PIC for this purpose, can not remember the type but it had 18 pins. However for this purpose it is also sufficient a LM3914 that can operate as bar or dot

Best Regards
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  #1557  
Old 03-15-2017, 08:54 AM
abdou2014 abdou2014 is online now
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Default Qestion to Franco

I tested your lrl ( C13 / 10 nF ) ( very sensitive to static and magnetic and sky effect ) with a High Frequency Generator ,
Trying different antenna the reception frequency does not change (77-80 Mhz)
is it normal , I want to increase it to 100 Mhz, how to do ???
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  #1558  
Old 03-15-2017, 10:15 AM
abdou2014 abdou2014 is online now
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do you Think with replacing the quartz with 10 mhz we'll receive 100mhz ???
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  #1559  
Old 03-15-2017, 10:47 AM
FrancoItaly FrancoItaly is offline
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My lrl works well (in my country) with various quartzs : 3 - 4 - 6 - 8 and 10 Mhz. you may try 10 Mhz but I think that there is no apparent link between the frequency of the quartz and frequency determined by L1 / C10.

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  #1560  
Old 03-18-2017, 09:12 AM
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dream_man dream_man is offline
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Exclamation

Hello dear Franco;
Hope you are well and your face is smiley. I found that this system would turn on its LED1 just near a wastewater hole or sewage hole. As I understood, at these types of places, there are some sort of gases like Hydrogen sulfide and some Ions like Ammonium Ion.
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  #1561  
Old 03-20-2017, 05:33 PM
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zakari zakari is offline
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hi all


hi all iranian members

happy new year


best regards
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  #1562  
Old Yesterday, 10:55 AM
FrancoItaly FrancoItaly is offline
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The lrls are devices with high gain and therefore easily influenced by any source of electromagnetic disturbance, it would be better to do the tests away from any disorder.

Best Redards
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  #1563  
Old Yesterday, 07:55 PM
LRLMAN LRLMAN is offline
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Default COPER BAR

I still can not upload images............................................ .........
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