NEW TECH PHOTOS

[Tinkerer]

My quick reply wasn't ample, huh?



My suggestion would be to initially design a light-weight unit for coin/relic hunting utilizing an 8" coil. (Hays has a couple of 8" housings that would work well.)

The TX power should be determined as the design progresses, due to all of the trade-offs between TX power, battery consumption, battery size, unit weight, etc., which are all dependent on the pulse width, pulse frequency, coil parameters and driver circuitry.

A primary goal should be to achieve some form of ferrous/non-ferrous discrimination. Your IB-PI experiments should obviously be the stepping stone for this goal.

Very good observations. Could you post a drawing of the Hays 8" coil housing, so that we can design a coil that fits?

Yes, everything is interdependent. This is why I want to take the decisions now, taking into consideration the wishes of the team members.
As a starting point, lets use a middle ground. Medium everything.
But lets define the numbers.
Say: TX 100uS, max 2A coil current, 12V, 600 PPS?

Tinkerer

[hobbes_lives]

OK, but, lets go a bit further.

My quick reply wasn't ample, huh?

Purpose: Relic hunting? Coil hunting? Gold nuggets?
Power: 500mW, 1W, 2W, ? This concerns mostly TX power, for the rest of the circuit we look where we can save power but keep it simple.
Coil diameter: Medium = 10 to 12", small = 8 to 10" ?

My suggestion would be to initially design a light-weight unit for coin/relic hunting utilizing an 8" coil. (Hays has a couple of 8" housings that would work well.)

The TX power should be determined as the design progresses, due to all of the trade-offs between TX power, battery consumption, battery size, unit weight, etc., which are all dependent on the pulse width, pulse frequency, coil parameters and driver circuitry.

A primary goal should be to achieve some form of ferrous/non-ferrous discrimination. Your IB-PI experiments should obviously be the stepping stone for this goal.

[Tinkerer]

You've set the first goal in your statement above...

OK, but, lets go a bit further.
Purpose: Relic hunting? Coil hunting? Gold nuggets?
Power: 500mW, 1W, 2W, ? This concerns mostly TX power, for the rest of the circuit we look where we can save power but keep it simple.
Coil diameter: Medium = 10 to 12", small = 8 to 10" ?

I would like to get some feedback by team members.

Again, everybody is invited to join the team. I did make a few direct invitations, but then I realized that this might look as if I am just trying to generate a lot of posts.
So please Max, Qiaozhi, B^C, Porkluvr, EVERYBODY is invited.

Tinkerer

[hobbes_lives]

Next job, parameters. What are our goals?

You've set the first goal in your statement above...

I am thinking of a basic model, that will be easy to build. This way many can build it and try it in the field...

[nick_f]

Tinkerer, I was looking at the graphs and I am puzzled why there is such a big difference between the cannon ball and the steel lugs and steel nails. Isn't the cannon ball made of iron too? I would suggest to take another photo just with a very rusty nail (because we have much more (mis)chance to find rusty iron than steel lugs). And if it happens that you have some hot rocks in your collection, maybe you should take a shot of those ones too. By the way, I discovered that my hot rock attracts magnets, in fact I can hold the rock suspended by a neodymium magnet.

Regards,
Nicolae

[Tinkerer]

I concur.

Thanks hobbes,

Let's call it TINKERERS IB-PI.

Next job, parameters. What are our goals?

Tinkerer

[Tinkerer]

Hi Nicolae,

congratulations for a fabulous job. Now one can really see the various responses for various targets. I even feel like buying one of these detectors myself.

Thanks

Tinkerer

[nick_f]

The rest of the photos.

[nick_f]

Hi All,
Here are Tinkerer's photos, with the signal for no target superimposed on every image. At this stage I realised I should have added some text about the ownwer of the photos (Tinkerer). He also asked me to take credit for editing the photos, which I do hereby

Regards,
Nicolae

[hobbes_lives]

I think that it should be named "The Tinkerer PI" As all of the tinkerers around the globe will be doing just that!

I concur.

[Mustafa]

I like short names.
What about Ti-PI

[Tinkerer]

Hi Tinkerer,
I think that it should be named "The Tinkerer PI" As all of the tinkerers around the globe will be doing just that!
Cheers

Hi Mechanic,

not a bad idea at all, it fits in with the "loose parameters".

Anybody second that name?

Tinkerer

[Mechanic]

Hi Tinkerer,
I think that it should be named "The Tinkerer PI" As all of the tinkerers around the globe will be doing just that!
Cheers

[Tinkerer]

You need to think of a clever name!

I am thinking of a basic model, that will be easy to build. This way many can build it and try it in the field, so hopefully we get a lot of feedback for a full blown model with more Christmas tree lights and bells and whistles.

Everybody is invited to share their knowledge in the project and the team.

The first job of the team will be to chose a name.

The second job will be to select some loose, basic parameters.
I am thinking of loose parameters, because, this being a worldwide effort, it is often very difficult to find the exact parts to replicate the design.
So I am thinking more of a worst case approximation, that will be easy to reproduce.
The advantage will be that we end up with a variety of executions that we can compare and thus learn from it.

Tinkerer

[Carl-NC]

You need to think of a clever name!