felezjoo PI(the best pulse induction metal detector that I made until now)

[useus]

Try several parallel resistors that will get you below 10 ohms

7ohm A115 B332 C481
5ohm A117 B339 C485

[6666]

I tested resistance 10 ohms, in parallel gives me coil error, in series instead the values have fallen to A117 B336 C487
at the moment I have no resistance below 10ohm to try


to be sure that the cable is not the problem I also tried to connect the coil directly on the pcb but even the values have dropped so the cable should be ok

Try several parallel resistors that will get you below 10 ohms

[useus]

It is recommended that you try a series of 1-10Ω resistors in the coil, there will be different effects

I tested resistance 10 ohms, in parallel gives me coil error, in series instead the values have fallen to A117 B336 C487
at the moment I have no resistance below 10ohm to try


to be sure that the cable is not the problem I also tried to connect the coil directly on the pcb but even the values have dropped so the cable should be ok

[useus]

It is recommended that you try a series of 1-10Ω resistors in the coil, there will be different effects

in series or in parallel on the coil?
2w resistors?

[jinbiao]

I built new coil but I have doubts. the debug values are A147 B389 C530 328uH coil 1.2 ohms. to increase the values I added 4 turns of wire to the coil and became 418uH 1.4 ohms but the values rose to A189 B427 C569.


the coil is made from 25cm in diameter (23 turns 328uH, 27 turns 418uH), enamelled copper from 0.71 (22swg)


I doubt that my LF357N is not original or I'm doing something wrong with the construction of the coil.


please help me!

It is recommended that you try a series of 1-10Ω resistors in the coil, there will be different effects

[useus]

I built new coil but I have doubts. the debug values are A147 B389 C530 328uH coil 1.2 ohms. to increase the values I added 4 turns of wire to the coil and became 418uH 1.4 ohms but the values rose to A189 B427 C569.


the coil is made from 25cm in diameter (23 turns 328uH, 27 turns 418uH), enamelled copper from 0.71 (22swg)


I doubt that my LF357N is not original or I'm doing something wrong with the construction of the coil.


please help me!

[useus]

Hello everyone, I'm new.
I built the felezjoo pi, not being practical I would like clarification about the configuration, the basic metal detector does not detect the gold. at the moment I have only one 790uH - 2.9ohm coil but I have noticed that a 350uH - 1.0 ohm coil is recommended.
to detect gold, just replace the coil or do you need to set parameters in the menu?


thanks!

[ricalbertvig]

hello ... the fact of everything that is recommended in the forums to solve the problem error of the coil ,,, changed bs170, the mosfet 840, the resistance 2.2 k and still nothing ,,,, I could not solve this problem ,,, I have used several 328p ,,,, also several programoderes ,,, I have tried changing the fissile ,,, it will be that all the piesas that I have tried are false? ,,, what annoyance that of coil error
hello ... the fact of everything that is recommended in the forums to solve the problem error of the coil ,,, changed bs170, the mosfet 840, the resistance 2.2 k and still nothing ,,,, I could not solve this problem ,,, I have used several 328p ,,,, also several programoderes ,,, I have tried changing the fissile ,,, it will be that all the piesas that I have tried are false? ,,, what annoyance that of coil error

[gandolfi]

You have to read more on subject.

http://www.geotech1.com/forums/showt...961#post220961

thanks

[chevesne]

You have to read more on subject.

http://www.geotech1.com/forums/showthread.php?22564-felezjoo-PI(the-best-pulse-induction-metal-detector-that-I-made-until-now)&p=220961#post220961

[gandolfi]

where do you bought LF357N ? there is fake on ali express or ebay ?

[chevesne]

Anywhere, except for the LF357N.

[gandolfi]

Ooops!

See links for detector.
[ATTACH]43214[/ATTACH]

thanks.
Where do you buy material (ali express...) ?

[chevesne]

Ooops!

See links for detector.

[gandolfi]

Detector.

Coil.

thanks for your information

it's the same link. is it normal ?