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

[samii]

Hello

New hex from Felezjoo website.
v.3.35

v3.35.zip

[jladre]

a little clue

[6666]

[ATTACH]36496[/ATTACH] a little clue

Thanks but its a bit out of focus could you please take the picture in focus thanks

[jladre]

maybe i can make it better next time

Thanks but its a bit out of focus could you please take the picture in focus thanks

[jladre]

people in persia are arguing to this so called 2 stage amp designed.

[selim]

[gurdal]

hello if I connect a coil 380 uH coil 38 cm radius with 1 mm wire device not opening giving coil error .İf I open device without coil and connect during startup felezjoo working without any problem.
if ı connect serial 8 ohm to coil device opening. How can I solve this problem?

[ivconic]

hello if I connect a coil 380 uH coil 38 cm radius with 1 mm wire device not opening giving coil error .İf I open device without coil and connect during startup felezjoo working without any problem.
if ı connect serial 8 ohm to coil device opening. How can I solve this problem?

Use thinner wire.

[Tagomago]

The "2 stage amp" shown in #980... I don't get it.


What is it? Voodoo? An idea to get rid of your precious LF357s?


This circuit - the way it is pictured - will do exactly nothing to your signal, however it will most likely heat up (and potentially destroy) the second LF357...

[Teleno]

10K is going to be a hell of a noise source.

[6666]

Starting my build today, just going through junk box for all the bits, will be useing 2n7000 for T1.

[samii]

Hello

My felezjoo working good .İt is not detecting coin if coin is vertical position to coil.Dedecting coin good (30 cm distance ) paralel or horizental to coil with a spider coil (30 cm)

[kadir6141]

hi friend 3.35v good working
https://www.youtube.com/watch?v=wcCI_V1DB_w

[gurdal]

Use thinner wire.

Use thinner wire ?

[ivconic]

Use thinner wire ?

"...hello if I connect a coil 380 uH coil 38 cm radius with 1 mm wire..."

1mm wire is too thick for coil with only 38cm diameter, by my humble opinion.
For 38cm diameter coil i would suggest wire gauge between 0.55 to 0.7mm.
But for this particular detector; i would not suggest use of single Cu lac wire.
Inter capacitance is high and FelezJoo PI don't like it.
Instead use litz wire with common gauge not exceeding 0.55 to 0.7mm, preferably pvc coated (a bit more inter space - much less inter capacitance).
Or in case if you insist on single Cu lac wire; than don't make conventional single layer coil but do make spider or basket coil instead with it.