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

[useus]

today first use in the field, various findings even at 28cm depth!
my felezjoo is finally completed and fully functional! he is really sensitive, he found me an m4 nut about 10cm below the ground.
I can safely use sensitivity 18 with unshielded flat spiral coil.
I shielded the electronics box,
mounted C14 / C26 green cap capacitor and replaced R10 with 15ohm as refinement of debug values.

[ionut_mtb]

today first use in the field, various findings even at 28cm depth!
my felezjoo is finally completed and fully functional! he is really sensitive, he found me an m4 nut about 10cm below the ground.
I can safely use sensitivity 18 with unshielded flat spiral coil.
I shielded the electronics box,
mounted C14 / C26 green cap capacitor and replaced R10 with 15ohm as refinement of debug values.

Hello, Sens 18 in the field is not recomended but if no false signals then is ok. What settings did you use? How big is the coil and what version did you use of software? How is the iron separation?
I’m thinking to build 50-60cm coil because i don’t want to sense all the small iron in the ground.
My settings for stable detection is sens 16, pw160, freq201, delay30, integ44, ground8, speed8(not sure), iron reject(depend on coil)

[useus]

flat spiral coil 25cm external diameter, 349uH 1.0 ohm 30-32 turns (not remember, see my older post in the topic) 0.71 copper wire magnet
iron separation not tested but have optimal debug values
sens 18
speed 10
pulse 150
freq 200
delay 10 to 20 (autodelay 19)
integr 32
ground 5 to 10
3.35 original 300 times use

[tenere750]

can you give me the file 3.35 original 300 times use

flat spiral coil 25cm external diameter, 349uH 1.0 ohm 30-32 turns (not remember, see my older post in the topic) 0.71 copper wire magnet
iron separation not tested but have optimal debug values
sens 18
speed 10
pulse 150
freq 200
delay 10 to 20 (autodelay 19)
integr 32
ground 5 to 10
3.35 original 300 times use

[useus]

you can find it in the topic, it has already been uploaded several times

[tenere750]

you can find it in the topic, it has already been uploaded several times

which of the two is it demo 300 that's what I'm looking for

[useus]

I have a question to ask you about the power supply and the circuit. the metal detector consumes about 115ma without target.
I use 3x18650 2000ma BMS 3S and XL6009 boost to bring the voltage to 18V.


Calculating 2000ma (batteries): 115ma (consumption) the theoretical use should be 17 hours (without targets), but it lasts about 3 hours.
I can't understand what causes batteries to last so short

[Qiaozhi]

I have a question to ask you about the power supply and the circuit. the metal detector consumes about 115ma without target.
I use 3x18650 2000ma BMS 3S and XL6009 boost to bring the voltage to 18V.


Calculating 2000ma (batteries): 115ma (consumption) the theoretical use should be 17 hours (without targets), but it lasts about 3 hours.
I can't understand what causes batteries to last so short

Have you tested the batteries with a constant current load to confirm their actual amp-hours capacity, and not what's printed on the side of the batteries?
There a lot of fake batteries available on the internet. If your battery pack is really 2000mAh, then 3 hours implies that the circuit is consuming an average of 667mA.

[useus]

Have you tested the batteries with a constant current load to confirm their actual amp-hours capacity, and not what's printed on the side of the batteries?
There a lot of fake batteries available on the internet. If your battery pack is really 2000mAh, then 3 hours implies that the circuit is consuming an average of 667mA.

no I have not tried, it is probably as you say, I will change batteries with original sony and we will see if I solve

[green]

I have a question to ask you about the power supply and the circuit. the metal detector consumes about 115ma without target.
I use 3x18650 2000ma BMS 3S and XL6009 boost to bring the voltage to 18V.


Calculating 2000ma (batteries): 115ma (consumption) the theoretical use should be 17 hours (without targets), but it lasts about 3 hours.
I can't understand what causes batteries to last so short

Was the 115ma measured at the circuit or the batteries?

[useus]

Was the 115ma measured at the circuit or the batteries?

Circuit

[green]

Circuit

With the boost supply the battery current is probably closer to 200ma? Still doesn't explain the 3 hours.

[ionut_mtb]

Hello

Depending on the type of loop used and especially the frequency and width settings of the battery, the battery consumption will vary. If you use the suggested loop with the capacity and resistance mentioned, the consumption of a circuit with a frequency of 200 and a pulse width of 160 is about 100 mA. The more these two settings, especially the pulse width, the greater the battery consumption. However, the overall battery life of this circuit ranges from the lowest to highest values for frequency and pulse widths of approximately 50 to 500 mA.

Be sure to use the piezo loudspeaker so that the noise will not be pushed into the circuit when it is sounded and the balance will not disturb. The main issue with this is the use of a conventional loudspeaker, which will significantly increase the circuit's current flux when it is sounded, resulting in a slight change in the voltage and balance of the device. So I strongly recommend that you use a piezo speaker, which is an impedance speaker and does not significantly increase the circuit current consumption during the beep.

Circuit Power Specifically an 18V battery which is also recommended as 5 lithium ion 18650.

[useus]

I have a question to ask you about the power supply and the circuit. the metal detector consumes about 115ma without target.
I use 3x18650 2000ma BMS 3S and XL6009 boost to bring the voltage to 18V.


Calculating 2000ma (batteries): 115ma (consumption) the theoretical use should be 17 hours (without targets), but it lasts about 3 hours.
I can't understand what causes batteries to last so short

I solved, it was the bms that had problems, the metal detector has been on for 5 hours with the coil connected and has not yet turned off!
if it arrives at 8 or more hours I will be happy: D

[useus]

The end

thanks for your advice and help!



if one day I feel like it I will try to write the code from scratch, unfortunately the author does not update the project anymore and I am of the idea that it can be improved, perhaps also by inserting the motion option