what to build first.. i dont have a metal detector so which one is best for using on the beach

[David_1]

Hi all my first post, I write pic code I draw and design pcbs surface mount is my normal choice. I have spent days reading this forum but have no clue where to start , oh I also make my own pcbs for prototypes ??

so can someone suggest a suitable detector that my suit me please :-)

many thanks
David

ps I am diver so find myself near the sea alot

[Davor]

ps I am diver so find myself near the sea alot

That gives you your answer. Your best choice is a hermetically enclosed PI of just about any flawour you find fit. With your choice of technology being surface mount, go for a Hammerhead.

PIs are deaf for short lived time constant target responses, including sea water. You'll have no discrimination of your targets though. In case you roam thrash filled beaches you could go for a VLF with good discrimination like IGSL or Cobra, but get prepared for lots of funny sounds on the shore line.

[golfnut]

The surf kit will be the cheapest and easiest.

S

[David_1]

I found this thread for the igsl now off to look for the hammer head
http://www.geotech1.com/forums/showt...highlight=IGSL

but failed to find a surf kit ?? did you mean whites surf ?

Thanks for quick replies
David

[David_1]

http://www.geotech1.com/cgi-bin/page...head/index.dat
hammerhead page :-)

[Carl-NC]

David, there are a number of PI circuits floating around. The Hammerhead (I) is already available in SMT but it is all-analog. HHII has a PIC but not SMT layout. Tec is just about to post a PIC32-based PI in the SPI-MX forum. There is a SMPI clone that Silverdog is selling as a kit, see here. Your biggest problem isn't the circuitry, but the enclosure. A good waterproof detector housing is hard to find. I hope to have a remedy for that soon.

- Carl

[David_1]

thanks for the heads up... im just reading loads at the moment, not too worried about the waterproofing. its not having a clue about metal detectors is the problem :-)

[kt315]

if you do not want to order the PCB and want do all yourself, a VLF detector on PIC, you can try COXA-2T-M http://www.md4u.ru/viewtopic.php?f=9...97849&start=25

schematic of COXA-2T-M http://depositfiles.com/files/w9kgqlrr5

[kt315]

[David_1]

lots of (well) not english i found a hex file and a utube but not enought to understand that. but thanks :-)

[Qiaozhi]

its not having a clue about metal detectors is the problem :-)

In that case - blatant advert coming up ...

I advise that you order this book ->
http://www.geotech1.com/forums/conte...metal-detector

[kt315]

lots of (well) not english i found a hex file and a utube but not enought to understand that. but thanks :-)

look also this thread I had opened http://www.geotech1.com/forums/showt...highlight=soha

[David_1]

In that case - blatant advert coming up ...

I advise that you order this book ->
http://www.geotech1.com/forums/conte...metal-detector

seems like a very cheap way to start so I orded book hope it arrives soon :-)

[David_1]

cool book now I need to find time to read it LOL
i flicked throught it, lot and lots of stuff in there :-)

[Qiaozhi]

cool book now I need to find time to read it LOL
i flicked throught it, lot and lots of stuff in there :-)

Hope you enjoy reading it!