Simple Russian PI detector Pirat

[gandolfi]

- what do you think about this kit compare to lm301 or k157ud2 ?

https://www.ebay.fr/itm/DIY-kit-metal-detector-Pirate/223012059126

- what pcb and part list take for better performance ?
- what the difference with PICKINI (depth, esaier ti use or build...) ?

http://users.telenet.be/willaert/MD/pickini/pickini_en/V4/electronics.html

thanks

[sinclairuser]

hi has anyone tried this circuit with the lm301/, the russian source stated that it was compatible with the k157ud2.

http://www.ti.com/lit/ds/symlink/lm101a-n.pdf

https://www.mouser.co.uk/Semiconductors/Amplifier-ICs/Operational-Amplifiers-Op-Amps/_/N-4frvm?keyword=LM301

the top link is the lm301 datasheet, the bottom is mouser where all versions are available, even metal can through hole, though the plastic dip package says end of life but is still available, so maybe there is an alternative to the soviet chip, would be nice to know since the only variant that works correctly is that version.
since the lm 301 is an 8 pin package, i can only think that it is electrically compatible not pin for pin, but the pirat does not use all the pins on the k157ud2, so we may be in luck and able to find an opamp other than k157ud2 that works as prescribed.

[Rumcajs]

hi all,
here is an datasheet from the low-noise & dual op-amp, type K157UD2
pinout (from pdf)
1 1. compensation
2 1. non-inverted input
3 1. inverted input
4 -U
5 2. inverted input
6 2. non-inverted input
7 2. corr
8 2. corr
9 2. output
10 ? (empty?)
11 +U
12 ? (empty)
13 1. output
14 1. corr

Max. input 500mV;
Similar than uA747--another pinout!
k157UD2 link: http://www.datasheetspdf.com/pdf/1097444/ETC3/K157UD2/1

747 link: https://www.elprocus.com/op-amp-ics-pin-configuration-features-working/

[Hammerhead]

Thank you my teacher

[Arionas]

[Arionas]

Very Good Work and Very Good Video Mr Hammerhead

[Hammerhead]

Good work Hammerhead.

Wish you a big treasure soon.

Thank you. I learned a lot from this forum

[WM6]

Good work Hammerhead.

Wish you a big treasure soon.

[homefire]

Good Stuff. Everything needed in One Hole. Thank You.

[Hammerhead]

[/ url]

Your student has succeeded in building a pirate my friend https://youtu.be/7QtBcQ9Yxjw?t=3

[seriall714]

Hello,

Anybody tested this in saltwater ? i would like to use it in water(underwater) i hope clear sound?

thanks

[kt315]

Can someone tell me how much turns i need for a 5mm diameter ferrite rod with 0,25mm wire to reach the 330uH?
And how much for a 10mm diameter?

Thanks in advance!

you can buy absolutely perfect universal meter KIT http://www.geotech1.com/forums/showt...2-Chinese-toys
look my post from #21.
it does all measurements.

[homefire]

Contact SilverDog via PM. He made arrangements for payment for me one time without bank card.

[BKY1337]

Can someone tell me how much turns i need for a 5mm diameter ferrite rod with 0,25mm wire to reach the 330uH?
And how much for a 10mm diameter?

Thanks in advance!

[Arionas]

Post #173 in this thread is my layout, i used 68k instead of 62k resistors, the ceramic cap is a foil capacitor and the transistors are BC558 and BC548.
12 Ohm instead of 10Ohm and the Mosfet is IRFP450, but i think this doesnt make much difference.

05-23-2017, 08:07 AM #173


http://www.geotech1.com/forums/showthread.php?22047-Simple-Russian-PI-detector-Pirat/page7