Pin pointer, THE MAGIC WAND

[Monolith]

Pin pointers can help a lot in extracting targets.

Looking at APBerg's long board design and how he placed it into a PVC pipe got me to thinking that, with today's SMD capabilities, one could build a circuit that fits into a 1"1/4 PVC pipe that serves as the handle including the battery.
Then connect a 3/4" PVC pipe to it that contains a 4" ferrite rod with the amount of windings to make a 300uH inductor.

THE MAGIC WAND

Probably it would be best to use a non-motion design.
Maybe use a vibrator like they use in cell phones as indicator? Right in the handle?

Just a stick. No external parts.
Well, almost.

An ON-OFF switch

A tune switch

Both switches could be magnetic. Reed switches.

Any suggestions?
Better ideas?

Monolith

[ApBerg]

Pin pointers can help a lot in extracting targets.

Looking at APBerg's long board design and how he placed it into a PVC pipe got me to thinking that, with today's SMD capabilities, one could build a circuit that fits into a 1"1/4 PVC pipe that serves as the handle including the battery.
Then connect a 3/4" PVC pipe to it that contains a 4" ferrite rod with the amount of windings to make a 300uH inductor.

THE MAGIC WAND

Probably it would be best to use a non-motion design.
Maybe use a vibrator like they use in cell phones as indicator? Right in the handle?

Just a stick. No external parts.
Well, almost.

An ON-OFF switch

A tune switch

Both switches could be magnetic. Reed switches.

Any suggestions?
Better ideas?

Monolith

Well... my thinking go's a little slow (sometime's)... your idea is some months old now...but I like the idea.
It must be in a pipe complete water proof, so I was thinking to make a little coil in it with a bridge cell for charging the batts... just like in a toothbrush..., what battery’s are best for it.. ?
Think the brain must be a microprocessor.... in the past I made the Tracker PI,... nice.. no adjustments to make...

If there are more idea's...

[silverdog]

pinpointer

I'm going to have a go at this one

http://www.md4u.ru/forum/viewtopic.p...t=1555&start=0

[taliesin]

thats a nice looking thang

anyone see "the gadget show" recently?.that battery in pic gp ultra did best in tests against all the most expensive brands.

[taliesin]

tuning

I'm going to have a go at this one

http://www.md4u.ru/forum/viewtopic.p...t=1555&start=0

how's this one tuned ? push button ?

[silverdog]

how's this one tuned ? push button ?

Petrapin operates in static mode with autobalancing
The onboard switch is used to setup, then all you need is an on/off switch
I guess it could be modded and a pager motor added for vibration indication, although battery will drain much quicker, the batteries are very cheap though

I'll post my progress

[homefire]

My Russian Sucks! Any place in English?

[goldfinder]

No SMD please

I got enough with standard board electronics without going to surface mount even though it takes a lot less room. Us geezers cant solder that tiny SMD stuff much less see it well enough to do a decent job.

Besides, a pinpointer should be a relatively easy circuit and a standard PI circuit with do a very nice job as a pinpointer. With a microcontroller PI it should be a fairly small circuit board.
goldfinder

[mikebg]

My Russian Sucks! Any place in English?

Here is translated
http://translate.google.com/translat...F8&sl=ru&tl=en

[silverdog]

Part of the Petrapin .pdf doc is in english

[ionut_mtb]

Does this pinpointer have instability to temperature changes or magnetic fields of the earth? I like the autobalance switch, no need of a potentiometer, easy to use with one hand.

[ripsdevala]

I fail all my pointers project, is this can be use in high mineral terain/vulcanic land?