Can pinpointer detecting thin chain?

[Nupi]

Take your time,
Stress is poison for humans.

[Davor]

Today I went to see my shack, and ... mission accomplished - it is still there. I did not make anything new though. The Colpitts Nupi will have to wait some more. It was a stressful week at work.

[Nupi]

It is easy. I have tons of time when I walking in water with metal detector and listening to the music. All that time I am thinking for new ideas. Music helps a lot. You should try.

I love listen to the music, to most types of music from classical to pop music,
but prefer quiet in my room. Directly from CD-player to the headphones.
But I get not good ideas from.
But find you so few gold that you have so much time to listen to the
music and thinking.?
I have an idea, you have to listen at the music from Shark Night - Dark Tide - Jaws..........
I think you run the water out. with your hair standing on, and you never come back

[Waikiki_Sweep]

You are definitely an Idea man, I bet you can not keep up with all of them.
Your Idea of an MP3 player in a MD is Gold. But this is even better.

It is easy. I have tons of time when I walking in water with metal detector and listening to the music. All that time I am thinking for new ideas. Music helps a lot. You should try.

[Waikiki_Sweep]

Maybe with a multiple coil which is made up of several small ferrit coils there are around with parallel coupled air coils.

You are right. It have to be a bar with multiply pinpointers.

Finally "Rake" Pinpointer has Poped-UP!!!!! I wanted to draw it from the beginning on this thread weeks ago.

Every pinpointer in the rake needs that short coil with highly concentrated focus of magnetic field and sensitivity at the end.
Also probably function of all CD4024 counters for all pinpointers may be provided by one microcontroller with many I/O lines to make it cheaper.
Offered by Davor coil with one inductance may helps too.
Automatic adjustment is a problem awaiting to be solved for this application and may be that microcontroller can do it too.

So finally "Rake" Pinpointer may be useful as a Gold Chains Detector & Nuggets Detector.

[Thomas]

Where is my Nobel Prize?

You are definitely an Idea man, I bet you can not keep up with all of them.
Your Idea of an MP3 player in a MD is Gold. But this is even better.

[Nupi]

Nupi pinpointer detecting by the top end and has short coil. That concentration of field and sensitivity in small area probably allows it to detect small targets even may be that needles.

Pinpointer from the picture has a long coil and I expect its magnetic field spreads more over long coil and sure it has lower sensitivity as result and lower chance to detect such tough targets like that needles.

Maybe with a multiple coil which is made up of several small ferrit coils there are around with parallel coupled air coils.

[Nupi]

OK. Just catch another one.

I have an idea for you: BLIND PINPOINTER!!! NO INDICATION AT ALL!!!

But how it works? If you using pinpointer for sure you holding metal detector in other hand and your headphones are on.
If you hold your coil close enough to pinpointer you have to hear some interference from its work.
And when your pinpointer find target that noises changing.

So let your pinopointer to communicate with your metal detector and use metal detector coil as a receiver of pinpointer emitting signals.
It will make staff much more simple and convenient especially to use underwater where you can not hear your pinpointer or look on it.

Sure there some experiments are required and may be some changes or tunings for frequencies but it looks doable.

You're a good illustrator, nicely done.
Your new idea is impressive. A Nobel Prize is not important enough for your idea. You deserve more than that.
But what you say is true "interference detection" can be very efective, but not new.


The coill you using is a very old. xp! from Microsoft???

[Waikiki_Sweep]

Not necessarily, there are pin-pointer with sensor part longer than 20cm, mounted on detector steam it can cover area comparable to detectors.

Problem is surgical needle detectability.

Nupi pinpointer detecting by the top end and has short coil. That concentration of field and sensitivity in small area probably allows it to detect small targets even may be that needles.

Pinpointer from the picture has a long coil and I expect its magnetic field spreads more over long coil and sure it has lower sensitivity as result and lower chance to detect such tough targets like that needles.

[WM6]

Even if such pinpointer will detect it somehow area it can cover is too small.

.

Not necessarily, there are pin-pointer with sensor part longer than 20cm, mounted on detector steam it can cover area comparable to detectors.

Problem is surgical needle detectability.

[Waikiki_Sweep]

The right question is: can pin-pointer (or detector) detecting hypodermic surgical needle placed at distance of 1-2cm alongside of the sensor (not at the tip):

http://www.geotech1.com/forums/showthread.php?11573-Detecting-Surgical-Instruments&p=42502#post42502

Such detecting is needed to clean places around schools and kindergartens from such dangerous needles.

Looks like it is very tough task. Even if such pinpointer will detect it somehow area it can cover is too small. You will need thousand hours to check school yard inch by inch.

Governments love ruling and regulating so you can just throw them an idea to add into every plastic head of hypodermic surgical needle a small rare earth magnet.
So you will be able to run with sensitive magnetometer and find it fast anywhere.

[WM6]

The right question is: can pin-pointer (or detector) detecting hypodermic surgical needle placed at distance of 1-2cm alongside of the sensor (not at the tip):

http://www.geotech1.com/forums/showthread.php?11573-Detecting-Surgical-Instruments&p=42502#post42502

Such detecting is needed to clean places around schools and kindergartens from such dangerous needles.

[Waikiki_Sweep]

Where is my Nobel Prize?

[Waikiki_Sweep]

Waikiki I know you have several good ideas. Tell us more.

Come on people, this is an open thread, where are the other ideas???

OK. Just catch another one.

I have an idea for you: BLIND PINPOINTER!!! NO INDICATION AT ALL!!!

But how it works? If you using pinpointer for sure you holding metal detector in other hand and your headphones are on.
If you hold your coil close enough to pinpointer you have to hear some interference from its work.
And when your pinpointer find target that noises changing.

So let your pinopointer to communicate with your metal detector and use metal detector coil as a receiver of pinpointer emitting signals.
It will make staff much more simple and convenient especially to use underwater where you can not hear your pinpointer or look on it.

Sure there some experiments are required and may be some changes or tunings for frequencies but it looks doable.

[Davor]

No.
My shack is out of town, and I'm there far less frequent than I wish. So it may take a while.
The way to make this automatic would require a voltage control of the oscillator working point, and the trimmer preset should be set near the sweet spot so that settling time gets reasonably short. The integrator would correct the working point in a way that the oscillator only barely triggers the beeps with no target. There are a few ways to achieve this. First step would be establishing where to apply voltage so that there is a predictable effect on the oscillator behaviour. Integrators are easy.