Simple Russian PI detector Pirat

[Arionas]

PIRATE NE555+TL072

[Arionas]

http://www84.zippyshare.com/v/HwAFoat0/file.html
http://www84.zippyshare.com/v/jpZLQcDd/file.html
http://www84.zippyshare.com/v/u2fBxXJE/file.html

[bernte_one]

and did you also test it? or is this just another variant that could work but not for sure

i build 4 variant of it, only one worked permant with original russian ic kdXXXX
other work not or with bad Performance or go up in smoke

[6666]

i build 4 variant of it, only one worked permant with original russian ic kdXXXX

bernte_one, you make a very important point, WHICH variant did you make that worked OK ? Thanks

[BKY1337]

I think it will work, because its exactly the same version as the K157ud2 one, just with a different Op Amp. I made this version by the way and it worked.

[BKY1337]

Can i replace the 1N4007 with a 1N4003? Its 200V 1A instead of 1000V 1A.

I think its just for the battery. Why do i need 1000V?

[homefire]

Yes, 1N4003 or even 4001 would work fine.

[BKY1337]

It doesnt work. I used LM358 and a 5Watt 220Ohm resistor. I dont know whats the problem.

[bernte_one]

as i said before, this detector is waste of time

for small working detector try pickini v4 smd Version or malysh fm2 latest Version

they are small, good Performance

at pirat some People have luck and most not

[Andi68]

It's no luck, it's the competence to make this device run - it works but bad, i want to take it for a pinpointer...

[BKY1337]

Bernte i asked you at the Detektorforum for a microcontroller few days ago, for the Pickini v4 THT version.
I can order all Parts from reichelt.de but not the microcontroller and i can not write the software on it. I can order one at ebay , and send it to you if its possible.
I dont want to order an usb programmer.

My first version of the Pirat worked fine. I made is as described and everything worked the first time, until i hooked up the battery wrong. This version is just a little bit different. I dont have the coil sound with this version, just a short clack when i connect the battery.
I think i made something wrong, maybe its just my used LM358N , need to try the TL082.
I used the IRF740 from the damaged one, also tried a IRFP450 but it also didnt work.
Maybe i need to use 12v instead of 9v for this version.

The Malysh looks super easy, but i think it has not enough depht. The Pickini4 looks like it has more.

[jladre]

You better build the surf pi 1.2.. it will save you more headache,

[homefire]

I obtained Barracuda PCB from K315 and it was a snap. MiniPulse PCB here waiting for me to do.

[BKY1337]

Coil works now. But still no sound. I can follow the oscillating signal til the speakers, through the op amps.
I couldnt do this with my other version. There was nothing oscillating at 200Hz. Its still too less voltage at the speakers only about 50mV.

Also the input wasnt oscillating at the op amp. I wanna bring the two PCBs to work.

I want to etch my own pcb. Is the surf pi double sided? How long is the longboard?
My copper clad boards are only 160mm long.

[homefire]

Surt Long is two sided. I have nothing that only shows traks