Jeohunter - Visual Ground Scanner

[geo-i]

correction

hello my friend are you sure the connection is correct wayer because i have tried to to connect but it's not right pin . i hope to you make sure it is again i do not understand what mean you say about bridge pin B and D with small cable ..........
the small coil need no bridging and the 1m .......
sorry my friend i hope can you correction it

[Funfinder]

Hi geo-i,

the connection info is correct because I have written this info
already 3 months ago.
Check out the picture below:
Does have your Jeohunter connector the same direction?

And yesterday I also have tested it with little LED-lamp and
9v batterie and the pin E was not connected as a second
proof that there is not any mirror-side confusion.

Is this ripped off cable from the standard 45x35cm coil?

You have 2 different little bridging cables on your fotos:
Which cable was original and which you soldered new?
The black or the white?
Take a magnificent glass and read the letters of the pins.

Please tell me both pin letters the short cable does connect.
If this cable was not ripped off and still is original located.
You also can make a makro close up digipix.

The pins are the soldering pins how they can be seen
on your foto (my grafic makes this clear, too).

Bridging Pin B with D means that you have to solder
a litte wire from pin B to D so there is a contact.

I wrote you a very easy understandable beginner
manual but if it's to confusing or complicated it may be
better that you find a person with some skills in electronics.

btw. those cables are connected somehow alltogether
from the coils-connection-side so I doubt you created
a destructive shortcut while ripping off the cable.

But of course it could have happened somehow.

Switch on the Jeohunter without coil and there should
appear some message like: coil error, no coil connected.
If so, I guess the Jeohunters electronic is still working.
Or make this test with an other working Jeohunter coil.


The pin connection is correct for my Jeohunter with
standard coil and also should be the same for yours,
however I don't know if they made some changes.


If the pins should really not work you could do the
following - but this is on your own risk:

Solder 4 little wires onto the Pins A, B, C and D and
then connect all kind of possibilites with your 3
coil-cables until the coil works again.

Good luck!

[geo-i]

thanks

hello friend thanks for your help in fact i know little of electronic i will try again . the two picture pin that i send to you is wrong place i dont no which one sorry . my pin letters is the same as your joehunter . this are the picture

[Funfinder]

OK, geo-i,
now I have opened my own coil connector because of you
for a second time and indeed I found the culprit.
There was some confusion with the 1m coil wiring.



However, below now the connection of my 45cm Jeo coil:

The inner white wire of the grey cable has to be connected
to A and the coax-shielding wire inside of the grey cable to B.

The connection of the single white wire with C fits
and also the little wire connection from B to D is O.K.


But there's a problem - because my cable has 3 different
single white wires and just one of them is connected.

When I opened the connector the first time I marked all
those wires so I had no problems at all but in your case you
have to check out now which single white wire is the right one:


But this is very simple - here the complete procedure:

First:
connect (bridge) PIN B with D (you can find the little
PIN letters A-E near the soldering pins.)

Second:
solder the grey cable -
the white wire to A and the shielding wire to B
and isolate those contacts

Third:
Solder the single white wires to C (just 1 at the same
time) until you have found the correct working one by
connecting the coil to the Jeohunter and switch it on.


Always be careful and mark wires if you cut them so
afterwards you know where they have been exactly.

I wish you good luck that everything will
work fine again and please tell us the results.

[Govind]

[QUOTE=THer1993; Let these "funfinders" clean the good sites off the rusty junk! When real treasure hunters with top notch detectors arrive, [/QUOTE]

Hi THer1993, Can you name some of the top notch detectors. Thanks Govind

[geo-i]

thanks

hello my freind thank you very much for helping me again
for opening your device for me some day i buy you lunch

[Funfinder]

@ Govind
Forget about that arrogant and offending fool, he won't write
again because he's to busy finding tanks with his PI frame.
He couldn't give you any really useful information anyway.


@ geo-i
Thank you very much for invinting me to some lunch, you're
welcome but normally I have to invite you 'cause I should
have opened the connector much earlier so you would have
had less trouble.

However - I really hope the Jeohunter's electronic circuit
was powerful enough to survive the whole mess so please
tell us if the coil now is good working again and let us see
a picture of your own new coil-holder-modification! Thx!

[geo-i]

thanks

hello my freinds
it ok you welcome when i finished this project i will be in touch
thanks for that advice does not matter for that .....
anyway joehunter realy best detector
for me i like this earth very much and have a lot of history need to be exploration
about geotech fourm are the best it help for all to learn

[geo-i]

success joehunter's coil

hello my friend now i have done my project
which you ask me to follow your instruction
and i have success with the work as you can
see the picture before and after is there any comment

[Funfinder]

Super!

Hi geo-i!

Congratulation to you - very good work!

I'm really happy that you made it and that the Jeohunter's
hitec circuits are that great so they haven't got the slightest
damage! Perfect.

I hope you have fully closed the connector finally or
you also can use some tougher tape instead of this.


So now, after you geo-i have proofen to be a very good electronic
engineer and repairer, I am shure you will find also huge treasures!!!


Good luck my friend, take care, thank you for the report and my best
luck wishes to you finding really precious stuff and always have
much fun and cool adventures while treasure-hunting.

Pls come back here if you have interresting news etc.

[geo-i]

thank

hello friend thank you very much for helping me i hope
you do too with the joehunter's if you have some
interesting project don't forget all member joehunter's to show the picture
thank again my friend i be back

[geo-i]

battery modification

hello my friend funfinder how are you.i have new project with the joehunter's battery
i tried to modification batteries joehunter's can i change the lithinum ion orignal joehunter's battery into sealead rechargeable battery (12v 1.2p) because I've made test on the sealead rechargble battery but there is a problem wiyh the joehunter's .
it work corretly not last long and the battery charge level off checking .whether the resistance is not strong enough or lithinum battery and sealed rechargeble battery are not the same volt?
or sealed rechargeble battery not charge so very long ?
can i use lithinum ion battery 3.7v 3000mAh because the orignal is 3.7 mAh 2000mAh just the mAh is not the same? and how many hours should i charge battery
my friend i want to learn a little electronic can you teach me . see the picture of two different type of battery that i have tested please give a comment . thank

[der_fisherman]

hello my friend funfinder how are you.i have new project with the joehunter's battery
i tried to modification batteries joehunter's can i change the lithinum ion orignal joehunter's battery into sealead rechargeable battery (12v 1.2p) because I've made test on the sealead rechargble battery but there is a problem wiyh the joehunter's .
it work corretly not last long and the battery charge level off checking .whether the resistance is not strong enough or lithinum battery and sealed rechargeble battery are not the same volt?
or sealed rechargeble battery not charge so very long ?
can i use lithinum ion battery 3.7v 3000mAh because the orignal is 3.7 mAh 2000mAh just the mAh is not the same? and how many hours should i charge battery
my friend i want to learn a little electronic can you teach me . see the picture of two different type of battery that i have tested please give a comment . thank

I would not recommend it.

The blue battery has 3.7 volts (x 3 = 11.1 volts, x4 = 14.8 volts, wrong voltages) and is physically very small.

The other battery is lead acid (12 volts) and physically much larger and therefore has the bigger capacity.......

You may or may not blow up the electronics with the Lithium batteries......

You may want to consider a battery pack of 10 x NIMH batteries (12 volts), either in AA or those funny sizes that you find in portable drill battery packs, the so called Sub-C batteries. A bit more capacity and weight than AA's......but chargeable in most NICAD/NIMH chargers still.......

Even buying a cheap drill may give you two sets......its a thought, more capacity, but also higher weight...

Voltage is important, but also capacity.....

Regards

Andy

[geo-i]

thank

hello andy thank for your suggest

[Funfinder]

Hi geo-i,

> 12-03-2011 i have been keeping the machine for last 8 mounth
,now i need to use it again but the battery does not charging.
does it because of the adapter does not working .

Now you wanna repair your battery pack - no problem.

Forget about the lead-acid pack, the voltage is to low etc.

You can use the Ultra Fire but you have to connect them correctly!



Connect the cells as you can see at the following schematic:

__-- -[- 3.7liion +]-[- 3.7liion +]-[- 3.7liion +]-[- 3.7liion +]-+__
....-- -[- 3.7liion +]-[- 3.7liion +]-[- 3.7liion +]-[- 3.7liion +]-+

Use the original Jeohunter battery pack plug - the center pin
is the plus 14.8 Volts, the "ring" around is minus/ground.


I recommend first make a test session:
for testing if the battery loader works connect only 4 accu-cells in series.

Here you can see the opened Jeohunter accu-pack:
http://www.geotech1.com/forums/showp...&postcount=173
and this is the "repaired" one:
http://www.geotech1.com/forums/showp...&postcount=176
but this is just for additional information, geo-i.


Better using a new plastic box for the lithium-ion cells.

But you may need the original battery-pack connector.
You can cut of the plastic carefully to get this connector.

You will need exactly 8 lithium-ion cells of the same type.
All of them first need to have the same charching-state -
either noncharged or all of them single-precharged.
Do you have 8 cells already?

If you charge them with the Jeohunter-loader they
have to be already connected 4 in series - the Jeohunter
loader cannot charge single cells.


It's not too complicated:
- make shure you connect the correct polarity
- create 2 series connection á 4 cells
- connect both plus poles of those 2 packs with the inner
pin of the jeohunter accu pack plug and both minus with the ring
- use a voltmeter or a little led-lamp to control everything is connected ok

Good luck and don't shortcut these cells - they could explode if you do so!
However you should be able to built this new battery-pack, it's really simple.