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  #1651  
Old 08-17-2017, 07:23 AM
ford ford is offline
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Hi all
I used BC549B and my Lrl work fine.

Best Regards

BC549B is low noise transistor via 200 ~ 450 hfe.
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  #1652  
Old 08-17-2017, 10:43 AM
FrancoItaly FrancoItaly is offline
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The absorption is very small, 20 - 40mA, depends on how many leds are used. I recommend two 9V batteries connected in series.
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  #1653  
Old 08-17-2017, 12:52 PM
kaligula kaligula is offline
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Originally Posted by FrancoItaly View Post
The absorption is very small, 20 - 40mA, depends on how many leds are used. I recommend two 9V batteries connected in series.
Great, ill use 4 mobile phone batteries from 3.7v and I'll conect them with 4s electronic board for lithium batteries. I'll have around 15v. I finish soldering today, but I'll try tomorrow or some other day. Thanks Franco for your cooperation. To bed is that I can't upload pictures. Is it there some other way?

https://image.ibb.co/ewNxMa/IMG_20170816_101751.jpg

https://image.ibb.co/ftBoBa/IMG_20170817_153400.jpg

https://image.ibb.co/ep5yBa/IMG_20170817_153418.jpg

https://image.ibb.co/m57TBa/IMG_20170817_153741.jpg
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Last edited by kaligula; 08-17-2017 at 01:42 PM. Reason: Can't upload pictures
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  #1654  
Old 08-17-2017, 02:38 PM
FrancoItaly FrancoItaly is offline
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Originally Posted by kaligula View Post
Great, ill use 4 mobile phone batteries from 3.7v and I'll conect them with 4s electronic board for lithium batteries. I'll have around 15v. I finish soldering today, but I'll try tomorrow or some other day. Thanks Franco for your cooperation. To bed is that I can't upload pictures. Is it there some other way?

https://image.ibb.co/ewNxMa/IMG_20170816_101751.jpg

https://image.ibb.co/ftBoBa/IMG_20170817_153400.jpg

https://image.ibb.co/ep5yBa/IMG_20170817_153418.jpg

https://image.ibb.co/m57TBa/IMG_20170817_153741.jpg

Good work, as regard to upload pictures, you must read forum rules, for example jpg no more than 1M.
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  #1655  
Old 08-18-2017, 09:48 PM
kaligula kaligula is offline
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Hallo Franko, from sensor stage I have 6,9 v. Is it good idea to remove all three 1p capacitators to decrease the voltage? When I touch the antenna voltage increase. In display stage I have problem, only one led is on and it's going on off only with use of 22k potentiometer. When R16 is not attached the led is off.
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  #1656  
Old Yesterday, 08:34 AM
kaligula kaligula is offline
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Now is ok. I put twisted wire of place at three 1p capacitors and now buy cutting it step by step I have around 5,5v at out of sensor stage. Now my problem is that when I touch the antenna voltage goes up.

https://image.ibb.co/cG7n6k/IMG_20170819_103023.jpg
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  #1657  
Old Yesterday, 10:42 AM
FrancoItaly FrancoItaly is offline
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Originally Posted by kaligula View Post
Now is ok. I put twisted wire of place at three 1p capacitors and now buy cutting it step by step I have around 5,5v at out of sensor stage. Now my problem is that when I touch the antenna voltage goes up.

https://image.ibb.co/cG7n6k/IMG_20170819_103023.jpg
Twisted wire instead of capacitors it's a good idea to reduce capacitance. As regards antenna test I already said that the important thing is that the DC output decreases or increases, that's there is a change, by performing that we are sure that all the sensor stage is ok. The only true test is in the test field.
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  #1658  
Old Yesterday, 11:58 AM
kaligula kaligula is offline
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Originally Posted by FrancoItaly View Post
Twisted wire instead of capacitors it's a good idea to reduce capacitance. As regards antenna test I already said that the important thing is that the DC output decreases or increases, that's there is a change, by performing that we are sure that all the sensor stage is ok. The only true test is in the test field.
Yes, sometimes it increase and sometimes it decreases. Now I'm not able to test it in open environment.until I'll not put in the box. It's very sensitive device. Does it good idea the 22k potentiometer to replace with 10 k? I think it has big value.I'll read again all thread to see where maybe I make mistakes. Thanks Franco.
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  #1659  
Old Yesterday, 02:34 PM
FrancoItaly FrancoItaly is offline
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Originally Posted by kaligula View Post
Yes, sometimes it increase and sometimes it decreases. Now I'm not able to test it in open environment.until I'll not put in the box. It's very sensitive device. Does it good idea the 22k potentiometer to replace with 10 k? I think it has big value.I'll read again all thread to see where maybe I make mistakes. Thanks Franco.
I think 22K or 10K it's the same thing. There is still a test that you can do, ie increase the gain until the compass effect appears and this is another proof of good functioning. Obviously, this does not guarantee that it also reveals the phenomenon.
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  #1660  
Old Yesterday, 02:52 PM
kaligula kaligula is offline
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Quote:
Originally Posted by FrancoItaly View Post
I think 22K or 10K it's the same thing. There is still a test that you can do, ie increase the gain until the compass effect appears and this is another proof of good functioning. Obviously, this does not guarantee that it also reveals the phenomenon.
I need to make field tests, but for that I'll need some time. I'm discovering something new about this device vith every new attempt to adjust it
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  #1661  
Old Yesterday, 03:56 PM
Milad.salsa Milad.salsa is offline
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HI FRANCO
I built a Franco circuit, but my circuit operates in the opposite case, when I touch the antenna, the LED turns on. My CIRCUIT has a lot of sensitivity to the ground, wall, and other objects. What is the problem?
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  #1662  
Old Yesterday, 04:19 PM
FrancoItaly FrancoItaly is offline
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Originally Posted by Milad.salsa View Post
HI FRANCO
I built a Franco circuit, but my circuit operates in the opposite case, when I touch the antenna, the LED turns on. My CIRCUIT has a lot of sensitivity to the ground, wall, and other objects. What is the problem?
Look at post #1659, as regards sensitivity to ground, wall I think that the gain is too big.
You must reduce gain in display stage.
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