Deepscan iductances and coil detection

[TufaN]

https://www.geotech1.com/forums/show...7-Superscan-PI

thanks engineer KT315

[ifrenide]

Thank you tufan . Mr kt315 probably you don't like Turkish modifications , you are an excellent politician. leave electronics and try politics ,you will get a big success

[kt315]

thank u for the feeback. if i'll try politics then who are helping you? i am arhivarius of the forum, i am Platinum Member.
thats enough.

[ifrenide]

hhhhhhhhhhhh my brother KT315 you are a platinum member because of your knowledge and your powerful politic. you have helped me thank you very very much , but you are like a severe teacher hahahahahahah I'm beginner Mr kat315 and you have have a big experience over me, so please be flexible with beginners please. and thank you very very much again

[sbalio1]

hi ifrenide
Did you make this version
I did it but the sensitivity is low with coil 40 cm
The sound of a signal on a metal is weak even when it is very close. Is it a problem with settings to increase the speed of sound when the metal approaches the coil

[ifrenide]

HI sbalio ,"what is your problem exactelly? you said two different problems . low sensitivity or speed of sound wich is 'sound frequency' . wich one you got ?

[sbalio1]

hi ifrenide
the sensitivity is low. With another detector pi and with the same metal and the same coil the detection distance is 1m.
I made all the adjustments and failed to improve the sensitivity
the sound does not accelerate when the metal approaches. like another video of super scan.


https://www.youtube.com/watch?v=21ARkDFUI9k

[ifrenide]

HI sbalio1. I'm sorry to be late . first of all you have to check voltages "are they ok?". you have to verify if you used an original ICs or not if not you have to adjust their activating compenents . your coil has to be with proper inductance and resistance.and the most important thing is you have to use an oscilloscope to see what hapens with your recieved signal with the proper relaionship with the other options like time delay .... like that I think you can build a working metal detector.
best regards.

[sbalio1]

hi ifrenide . ics I'm not sure they are original. Watch the video the sound does not accelerate as it should

[ifrenide]

HI sbalio . if you have a problem "only" with soud acceleration. you can solve this problem and increase the sound frequency by reducing the value of C21 47nf, and changing the resistor R53 10k with a lower value ,because these two compenents control the output frequency of U10 555 "timer" if you decrease them you can increase sound frequency.
best regards

[sbalio1]

hi ifrenide
the problem was the integrated circuit. bad quality..Tl082 .Tl081.I changed it with Tl062 .Tl061 brand thomson original.

[ifrenide]

Congratulations , Sbalio.is the depth exelent now ? if yes, please make a smal video, to show results. thak you .have a nice hunting.
best regards.

[sbalio1]

hi ifrenide.
the detection distance is not good.c was less compared to another detector with the same coil.i changed the 39k resistance with 19k to minimize the delay.I tested with a large coil and no success There is a lot of noise and weak detection

[sbalio1]

coil 27 cm .


https://www.youtube.com/watch?v=sVoH...&feature=share

[ifrenide]

HI sbalio .hahahahaha , you told me that the problem was due to fake IC's .I thinked you passed all problems.I will tell you congratulations later .
you detection depth not too bad, but not so good. I told you in the past you have to make a correct coil " correct resistance,and correct inductance", and then get original ICs and good capacitors and resistors.measure power supply voltages +12v,... they have to be correct.change c21 47nf to get a good sound frequency.
You can't make a working metal detector by just place copenents on pcb and solder them , "oh it's nice PCB"now let's connect the coil,where is the battery? ,aaaah it's here ."I made everything ok" oh It will work fine for sure . there is a sound waw ,that's great.now where is the coin? it's here.make it one meter far from the coil , and you suspect to get 80 cm depth. no .... it's only 25 cm .wak wak wak wak waaaaaaaaaak.
Sbalio my brother it is maybe 213 electronic compenents working with each other.it's a huge system. a small error will cost you reduced depth.Ask our god to help you.And you have to use linear researching method "one by one"to locate the error starting by the coil and then compenent quality,and then check voltages, soldering quality, pcb traces check if there is cracks or not.use good measuring devices.
like that I will tell you congratulations
best ragards.