Deepers Detector

[Xtrem]

Personally though, I would always connect the shield to the positive rail, as this minimises the possibility of a short circuit across the battery.

Not always, e.g on Surf-pi and Barracuda , Negative has to be the Ground (common) P-channel mosfet
in contrast of ...Minipulse, Deepers,Superscan, TDI, SD2000 N-channel mosfet
Delta pulse , change-pi ,Clone-pi ..are another story , they have virtulal Ground. ...
is mainly related to the connection of the search coil, and also is related how the op-amps are connected to the circuit , has to do with the filter capacitors of Noise Absoption of them and how they are connected, (sorry, i dont find the correct word).

[kt315]

To clarify what KT315 is saying:
If you use a single-core cable with an outer shield (so-called coax cable) then you must have the positive rail connected to the shield. This (of course) only applies to PI detectors that use the positive rail as ground. However, if you use a twin-core cable with an outer shield, you can connect the coil using the two inner cores, and then connect the shield to the negative rail. Electrically there is no difference.

Personally though, I would always connect the shield to the positive rail, as this minimises the possibility of a short circuit across the battery.

they are like too bad schoolboys in the class. they are always need in especial additional lessons
under teacher's stick. then they write 'you had banned on all russian forums'.

yes, George. Ground for logic 4000 IC's series we show always Negative bat. IT IS MAIN RULE.

i choiced Ground artificial point on opamp divider in DP. it is standart in all schematics.

[Qiaozhi]

you can shield a cable on Negative of battery (using 2 wire cable). oh oh oh. that is new discovery
for you.

NO DIFFERENCE TO USE THE CONNECTION POINT OF THE SHIELDING EITHER IT IS PLUS OR MINUS, but plus is more comfort only.

duped people everywhere.

To clarify what KT315 is saying:
If you use a single-core cable with an outer shield (so-called coax cable) then you must have the positive rail connected to the shield. This (of course) only applies to PI detectors that use the positive rail as ground. However, if you use a twin-core cable with an outer shield, you can connect the coil using the two inner cores, and then connect the shield to the negative rail. Electrically there is no difference.

Personally though, I would always connect the shield to the positive rail, as this minimises the possibility of a short circuit across the battery.

[kt315]

Nothing is wrong with the Schematic, Ground MUST BE the positive of Battery,
Shield of Coaxial cable,Shield of Coil have to be connect to Positive of Battery.

you can shield a cable on Negative of battery (using 2 wire cable). oh oh oh. that is new discovery
for you.

NO DIFFERENCE TO USE THE CONNECTION POINT OF THE SHIELDING EITHER IT IS PLUS OR MINUS, but plus is more comfort only.

duped people everywhere.

[Xtrem]

Nothing is wrong with the Schematic, Ground MUST BE the positive of Battery,
Shield of Coaxial cable,Shield of Coil have to be connect to Positive of Battery.

[chemelec]

Sorry I Didn't Notice the Positive Ground.

The main problem is that three gurus responded, but that they would not understand that the polarity of the battery is confused. Sit down please you three get a minus.

The scheme is drawn according to the board Deepers 10DD.
Since on board Deepers +Batt. is the GND, then and on my scheme +Batt. is the GND.
But if chemelec and WM6 just said that there is some kind of mistake, then kt315 decided to mix me with a muddy.
Obviously it is such a gratitude.

Keep the scheme with the changed polarity of the battery.


This scheme is quite suitable for use. However, if you do not like this scheme, then wipe it off and do not use.

[kt315]

i give you oscillograms you asked me. with YOUR polarity. just for funny duped blind squirell.

Since on board Deepers +Batt. is the GND

there is not +Bat is GND on the board. open your mind.

[LDTVN]

The main problem is that three gurus responded, but that they would not understand that the polarity of the battery is confused. Sit down please you three get a minus.

The scheme is drawn according to the board Deepers 10DD.
Since on board Deepers +Batt. is the GND, then and on my scheme +Batt. is the GND.
But if chemelec and WM6 just said that there is some kind of mistake, then kt315 decided to mix me with a muddy.
Obviously it is such a gratitude.

Keep the scheme with the changed polarity of the battery.


This scheme is quite suitable for use. However, if you do not like this scheme, then wipe it off and do not use.

[kt315]

D1 is Backwards.

the mind problem of those people they do not want to hear suggestion aside.
i wrote to use -Bat like a GND, they want +Bat. ok, you use -Bat but pins on opams of power supply you draw like
GND is -Bat. look on D9 D14 like GND is -Bat again.

whole schematic is unusable and unreadable. thats not funny.

[WM6]

D1 is Backwards.

This is cause there AC battery foreseen.

[chemelec]

D1 is Backwards.

kt315 very funny.
Thanks to you, its scheme is available to everyone who reads this topic, and on my circuit all checkpoints are marked.
Specially for you the final version of the scheme, with corrected all the mistakes.
It's a pity that there are no oscillograms.
Thank you for the photo inside. Enjoy the result.

[LDTVN]

kt315 very funny.
Thanks to you, its scheme is available to everyone who reads this topic, and on my circuit all checkpoints are marked.
Specially for you the final version of the scheme, with corrected all the mistakes.
It's a pity that there are no oscillograms.
Thank you for the photo inside. Enjoy the result.

[kt315]

if you do not have a schematic you do not know where to point and what to see/get. i hope that is clear for all.

[LDTVN]

Unfortunately, no factory specifications and factory waveform.
And we will certainly not see any factory specifications.

[Melbeta]

And as I would say, please give me the factory specifications material along with the factory waveform settings sheets, along with the specification settings for the waveforms, and the test points used for the factory specification settings.

The part value you gave was exactly correct. Each Deepers metal detector, is like a human being, some stronger, some weaker, and some just right, and each must be set to factory specifications settings by using an oscilloscope connected to proper waveform test locations.
Melbeta