Can pinpointer detecting thin chain?

[chemelec]

Cheap, Multi-Turn Pots

Multi-Turn Pots are Expensive. But 10, 18 or 25 Turn Trimpots are CHEAP.
A Short piece of 1/8 Inch Brass Tubing (From Hobby Shops) can be soldered to the Brass Screw Adjustment on these Trimpots, And than can be fitted with a knob for 1/8" Shafts.

Make sure the Brass Adjustment and the Inside of the Brass tube are Clean.
Carefully Than Pre-Tin the Top of the Brass Screw and partly fill the inside of one end of the tube.

Be Careful to Position it Sraight near the trimpot, than using a Weller Soldering Gun,
Heat the Tube to melt he solder in it, Than place it onto the Screw and Quickly Remove the Iron.

If all goes well it will be Straight and work really good.
On MY FIRST ATTEMPT at this, I had to Re-melt the tube Two times to get it Straight, But still didn't damage the trimpot.

[Nezocas]

Ok,

I'm not in any hurry

Regards

[Nupi]

Hi, Nezocas.
Tomorrow I'll send you the PP back, okey?
regards, nupi

[Nupi]

It's good to see that you're happy with it, that's my intention.


Don't say that, that you was dumb. You've made a mistake, that's it.
Everyone is mistaken sometimes. Some people do not tell because they are ashamed (for whom?) BS ego.
You should be proud of yourself. You made a great job. Moreover everything worked 100%.
nupi

[Nezocas]

WOW

Now it work´s like a charm.
What a "few" wrong turns wound in the wrong direction can make
I would like to see a commercial pinpointer detect up to this distance (probably even exists) but in the house of 50 to 100 euros

This is a really cheaply homemade pointer and easy to make (not for me I was DUMB)

Even if after 5 to 10 minutes of use it starts to get unstable, I think we can restart it to continue detecting

Regards

[Nupi]

Okey the video of the NPP of Nezocas is ready.
He is out of focus but you can still see what the intention is.
If someone is irritated by this he can give me a HQ cam. I will be forever grateful to him.

[Nupi]

Hi, Nezocas
So much work was not. The circuit was completely right. I will make the video with and without LED and buzzer.
You should take into account that if you the coil place near the circuit the detection point is what restless.
The video will not be good quality with my old camerea, but I hope good enough.


Best regards, nupi

[Nezocas]

Hi Nupi,

What a load of work I got you ... sorry

I will rewind the wrong windings tightly again .... do not worry about that.
Also seemed to me that I had the whole electrical part as it should be .... but you never know.
C2 must have been easy to change, but the BC not so easy, because its in very tight place ..... also thank´s for that
I see that you have added a LED and piezzo to make the video, nice..... but those parts will not apply to my setup, I will only use the motor.
I will also try to make the coil leads as short as possible to make it really compact

Best regards
Nezocas

[Nupi]

Hi Nezocas,

Today, I had not time to make the video, but I did restore the coil. I can not wrap the coil so good if you do that,
but you should do it again by yourself, okay?


Everything is doing well now.I have, C2 - 47nF replaced by a 33nF and the 2N3906 transistor replaced with a BC560,
this for a better performance. He is now as good as the prototype.Nice!!


Tomorrow I try to make the video, Which includes a stability test.
In this photo you can see the setup for the video tomorrow.


Best regards.

[Nupi]

[QUOTE=Nupi;190370............... we have the whole Geotech forum begging us
(including Carl and Qiaozhi). [/QUOTE]

Ye!! we have the whole Geotech forum begging us to leave.

[Nupi]

Gee, you hit the troll nerve. It only means your pinpointer has a potential to threaten the commercial one. It works like a barometer

The .step param statement is placed as a spice directive text somewhere on a schematic. There are some rules of using it, and the parameter that is changed is used instead of a value in curly brackets, say, {parameter}. I like the ".step param parameter list 1 2 3" formulation. I think the Colpitts version comes with it if not both, and swept parameter being the coupling parameter of the target (seek a statement like this: K1 L1 L2 {parameter})

I'm a MSEE for the time being.

To learn Spice good is too much time and energy for me as an RST (Retired Super Troll).
So, I'll leave that up to you then.

If we combine your expertise and my imagination,than, we have the whole Geotech forum begging us
(including Carl and Qiaozhi).

[Davor]

You're right Davor, but where is he?


It is interesting to visual the developed idea, and to see how that is, when change the feedback pin 5 and pin 1.


Just out of curiosity, what are you, an electronics engineer or would you rather not say.

Gee, you hit the troll nerve. It only means your pinpointer has a potential to threaten the commercial one. It works like a barometer

The .step param statement is placed as a spice directive text somewhere on a schematic. There are some rules of using it, and the parameter that is changed is used instead of a value in curly brackets, say, {parameter}. I like the ".step param parameter list 1 2 3" formulation. I think the Colpitts version comes with it if not both, and swept parameter being the coupling parameter of the target (seek a statement like this: K1 L1 L2 {parameter})

I'm a MSEE for the time being.

[PATCHES JUNIOR]

I will tell you that you need the member here named "AZIZ" he know more about building coils than anyone here. Hope he sees this thread and offers his expert opinion here to help you.

[Nupi]

The Colpitts configuration would be a bonus regarding the coils orientation mess-up. You can't miss.1 - your detector beep more frequently when it is out of stability, and not at all if it is too insensitive.
2 - There is no nice way of saying it, but yes, spice takes time. What you get in turn is a way to see the currents and voltages at places you normally do not check with a scope, and also replace just about anything. When you use a ".step param" directive you can sweep values that are not easy to sweep otherwise.

Spice is not able to replace imagination, but instead it makes you try odd concepts and see what else is possible.

You're right Davor, but where is he?


It is interesting to visual the developed idea, and to see how that is, when change the feedback pin 5 and pin 1.


Just out of curiosity, what are you, an electronics engineer or would you rather not say.

[Nupi]

Hi Nupi,

I dont have an Inductance meter.... so I can not say that my coil is exactly the same as yours "lack of equipment".... but I believe, I have followed your tutorial to the letter...let´s see

I think we should all applaud, whatever attempt to invent something new .... even just a way to lose rings in front of a coil

Best regards
Nezocas

Hi Nezocas,
It does not matter that you make a mistake. There you can learning a lot from.
If you knew how often I am mistaken.


On these pictures you can see what has gone wrong.