Originally posted by Teleno
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Originally posted by lamoiz View Post2: 1 ratio for the dimensions. the coil is made for a pulsed induction detector. this one has the role of tx and rx alternately. I did several tests; inductors equal like 150 and 150..100 and 100 but in the end, the best was a 2: 1 ration also for the inductors .. maybe somebody answer this question ???? ... i use of the litz wire, therefore, the capacitance is very low. the secret lies in the damping of the entire assembly. that's the secret .....
Could you tell us a bit more about your damping ? thanks.
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Originally posted by 6666 View PostCould you tell us a bit more about your damping ? thanks.
I specify that the direction of rotation of the fields is important,! otherwise they cancel and the inductance drops.
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Completed Arduino Nano PI
My wife also wanted one, so had to make two.
Stems from China via Amazon at around ?20 each (4 weeks wait though)
Batteries are 3x LiIon cells which slide into the bottom section of the case.
The case, panels and knobs are all 3D printed, as is the coil former on the LH detector.
Off for a beach holiday in Jersey in a few weeks time to put them to the test.
Many thanks all for the help.
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Originally posted by Olly View PostMy wife also wanted one, so had to make two.
[ATTACH=CONFIG]55433[/ATTACH] [ATTACH=CONFIG]55434[/ATTACH]
Stems from China via Amazon at around ?20 each (4 weeks wait though)
Batteries are 3x LiIon cells which slide into the bottom section of the case.
The case, panels and knobs are all 3D printed, as is the coil former on the LH detector.
[ATTACH=CONFIG]55430[/ATTACH] [ATTACH=CONFIG]55431[/ATTACH] [ATTACH=CONFIG]55437[/ATTACH]
[ATTACH=CONFIG]55435[/ATTACH] [ATTACH=CONFIG]55436[/ATTACH] [ATTACH=CONFIG]55429[/ATTACH]
[ATTACH=CONFIG]55432[/ATTACH]
Off for a beach holiday in Jersey in a few weeks time to put them to the test.
Many thanks all for the help.
Hope you have a wonderful holiday, and show us your finds!
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Originally posted by lamoiz View Posthi, the damping of l1 is 312ohm, the setting is done with the potentiometer tool described here by George. the method is to start with the coil l1, then to do the same thing on the totality of the two .. the total damp is at 300ohm. the Q is 1.25 before damping. I use 0.040mm litz wire because the srf is 850khz to 1.5mhz. But we leave the NANO subject, we can restart a subject in the coils ...
I specify that the direction of rotation of the fields is important,! otherwise they cancel and the inductance drops.
Thank you.
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Originally posted by Olly View PostMy wife also wanted one, so had to make two.
Stems from China via Amazon at around ?20 each (4 weeks wait though)
Batteries are 3x LiIon cells which slide into the bottom section of the case.
The case, panels and knobs are all 3D printed, as is the coil former on the LH detector.
Off for a beach holiday in Jersey in a few weeks time to put them to the test.
Many thanks all for the help.
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Just figured I would post up some fun pictures of my first field tested NanoPI. Worked well at the local river (Finds1). Managed to give my Nokta Simplex+ a challenge in wet sand beach condition. This is FAR from my final, polished version. Just proving out the mechanical stuff. I must admit my foam backed coil is rather light weight! ;-)Attached Files- NanoPI - Coil.jpg (231.6 KB, 179 views)
- NanoPI - Pots.jpg (183.5 KB, 147 views)
- NanoPI - Stem.jpg (325.4 KB, 124 views)
- NanoPI - Case.jpg (392.9 KB, 110 views)
- NanoPI - Beach find.jpg (204.5 KB, 133 views)
- NanoPI - Cuff.jpg (170.2 KB, 107 views)
- NanoPI - Field1.jpg (618.4 KB, 135 views)
- NanoPI - Finds1.jpg (309.5 KB, 131 views)
- NanoPI - Simplex.jpg (455.4 KB, 157 views)
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Originally posted by dingbatca View PostJust figured I would post up some fun pictures of my first field tested NanoPI. Worked well at the local river (Finds1). Managed to give my Nokta Simplex+ a challenge in wet sand beach condition. This is FAR from my final, polished version. Just proving out the mechanical stuff. I must admit my foam backed coil is rather light weight! ;-)
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