Surf Pi Professional Pcb's back in stock - NEW Prices

[smity]

Ready for field testing - thanks to this forum

Why the lower part of the detector made of aluminum ?.... Need to be made from steel!

[silverdog]

Good Job !

Pictures of completed projects are great - inspire many ideas

[bernte_one]

Ready for field testing - thanks to this forum

http://www.youtube.com/watch?v=HdtYFCj2UxQ

[Balu]

Silverdog, requesting PCB payment details, thanks.

[misko]

my surf pi-thank you silverdog

[WesP]

Pinpoint setting

Quote"
"As well as the following file for adding a pin pointer mode (note the resistor R numbers don't match the Surf PI Schematic, but its easy to locate the place to add it): Attached Images End Quote"

Has anyone done either of these mod and had them work? I was unable to get either one to make any difference in the operation of the detector. I believe I put it in the right spot????

[bernte_one]

Nice job Bernte
Is you setup waterproof ?

mine is working good now, i had to remove al the sockets to find an error under the last one on the pcb. but now everything works fine .

i need to find the right materials to make everything waterproof and if possible with neutral buoyancy.

greetings

Oh no my setup is not waterproof. The housing is a good base to make it waterproof. put i have the trimpots outside and they are a problem but i dont need a waterproof version.

Today i have tried to change some ic`s.
The parts that i have
build in at first: changed part result

TC7660
NE555 ILC555N other metallic sounding but no change in range
NE5534AP
HEF4066BP HCF4066BE no change at first look but 2-3cm more range
HEF4093BP HCF4093BE the range falls from 15-18cm 2Euro to 5-10cm
LM 358

at last i only left the HCF4066BE i have a range up to 18 cm with a coil of 24cm diameter from LIY0,25/1,3 with 1,3 OHM and 470microH (measured with a LCR meter) wdg? maybe 30.

Next i try a coil from copper wire 0,5mm 30 cm dia 30 wdg
should be round about 500microH http://deepfriedneon.com/tesla_frame6.html
but i hope not more then 3 ohm

Thank you for the tip with the wire bridge near irf, i have thougt about before.

[Alexismex]

I am right with you.... For my part i always put a wire and solder ,i do not trust via rivets
Alexis.

[ApBerg]

Hello,

here are some pictures of my finished project.
Some improvements follow this weekend i think my problems were caused by some ic´s.
I ordered the right one strictly like the partlist. If it works than better i post it that nobody take the wrong ones like me.

http://fotoalbum.web.de/gast/bernd.marten2/Surf_Pi

Hello Bernd,

I see on the photo's that the via's beside the IRF9640 are "open" think it is better to fill the via's with soldertin , or even beter put a wire link over it, now... it looks strange, but I do not now how many current the via's can take, the ground from the 1000 uF Cap and coil is made with those via's. If anybody has comments.... ?

Best regards.

Ap

[Majarit]

Hello,

here are some pictures of my finished project.
Some improvements follow this weekend i think my problems were caused by some ic´s.
I ordered the right one strictly like the partlist. If it works than better i post it that nobody take the wrong ones like me.

http://fotoalbum.web.de/gast/bernd.marten2/Surf_Pi

Nice job Bernte
Is you setup waterproof ?

mine is working good now, i had to remove al the sockets to find an error under the last one on the pcb. but now everything works fine .

i need to find the right materials to make everything waterproof and if possible with neutral buoyancy.

greetings

[bernte_one]

my finished surfboard

Hello,

here are some pictures of my finished project.
Some improvements follow this weekend i think my problems were caused by some ic´s.
I ordered the right one strictly like the partlist. If it works than better i post it that nobody take the wrong ones like me.

http://fotoalbum.web.de/gast/bernd.marten2/Surf_Pi

[Butler]

Surf Pi kit

I am new to the forum. I have contacted you today Silverdog regarding a kit purchase.
Thanks

[ApBerg]

Hello,

can i use for C 2 (standard 25V 1000uF) 25 V 2200uF and for NE555 (old) the LMC555 (newer, faster, less energy needed) ?

Hello,

No problem, both work. If your audio still drifts.. check C15 for good +/_ connection

Ap

[Miata]

Hi,

the LMC555 is a CMOS version of the standard 555 and should be compatible.

Regards
Jürgen

[bernte_one]

c2, Timer 555

Hello,

can i use for C 2 (standard 25V 1000uF) 25 V 2200uF and for NE555 (old) the LMC555 (newer, faster, less energy needed) ?