Let's made a PC-base metal detector with usb interface !!!

[Davor]

Switch off all effects!!!!

I always do. Problem of the Live! card was that rfont and back channels were based on different chips, back channel being realised with better ones (!?!). In meantime some people made some nice drivers enabling you to swap front and back, but as I said, a mild disappointment.

[tjmlena]

Does anybody know a good (and possibly a free) BLOG site (independent site)?
I'm thinking of to move over to start interesting new projects.
Aziz

Im planning to create forum and blog for metal detecting world , spanish and english sections.
Contact me if suits your needs.
All free.
Up to soon

[Aziz]

Im planning to create forum and blog for metal detecting world , spanish and english sections.
Contact me if suits your needs.
All free.
Up to soon

Sounds good but I want to have my own blog platform. So I could be legally sued for giving high-tech information.

Another possibility is writing technical publications (PDF's) and giving them for free to implement.

(How about the WBGB system, that knocks out the market leader???)


Well, let's wait and see what happens. I have all options. Even to fire the end-game "thermo nuclear weapon".

Aziz

[WM6]

I have all options. Even to fire the end-game "thermo nuclear weapon".


Aziz

Don't wait till trigger will not work any-more, due too high moisture.

[Aziz]

Don't wait till trigger will not work any-more, due too high moisture.

Hey, that is my intellectual property (IP). I can do with it, what I want to. (Even give it to the Japanese... oops.. Chinese).
No one in the f$kn universe can prevent me, from doing this (if the time is ripe of course).
All depends on the current case.
But it won't happen here. You have to look for it somewhere in the internet...
Aziz

[UrbanFox]

But it won't happen here. You have to look for it somewhere......
Aziz

How about fantasy land??

[Qiaozhi]

Does anybody know a good (and possibly a free) BLOG site (independent site)?
I'm thinking of to move over to start interesting new projects.
Aziz

There are several to choose from:
http://wordpress.com/
https://accounts.google.com/ServiceL...tmpl=start#s01
http://www.weebly.com/
http://www.blog.co.uk/
etc., etc., ...

And there's a review here of the top 10 blog sites:
http://topsitesblog.com/blog-websites/

[Aziz]

There are several to choose from..

Thanks Qiaozhi,

indeed, some interesting platforms to use.
Cheers,
Aziz

[Aziz]

How about fantasy land??

Hey UFox,

why don't you use a legal lawsuit against me to get the WBGB technology?

Comeon, I'm waiting...
Aziz

[Aziz]

BTW UFox,

you like calling me As-if.
I'll give you a hint by changing it into as-is (o la la... it's coming very close to my name) and take the detector signal measurements as as-is. Look very carefully at them and you can get the WBGB technology. You don't have to know physics, EM-science and even Candy science. You need some math basics however.

Comeon old boy, it's isn't so much difficult. Get your own WBGB technology.
Aziz

[Davor]

Back to the topic.
I found by pure chance, of course, that you may buy a pure yellow iron oxide powder for pottery colouring purposes in specialty hobby shops for ~15EUR/kg. I'm not that much into chemistry, but it appears to me that there must be a similar path to maghemite from this material as well.
Red oxide comes at the same price. You mentioned charcoal and water as alternative, and you may buy a self-igniting charcoal even for grills lately, not only for frankincense. Guess it is laced with potassium nitrate and it may complicate things.

[Aziz]

Back to the topic.
I found by pure chance, of course, that you may buy a pure yellow iron oxide powder for pottery colouring purposes in specialty hobby shops for ~15EUR/kg. I'm not that much into chemistry, but it appears to me that there must be a similar path to maghemite from this material as well.
Red oxide comes at the same price. You mentioned charcoal and water as alternative, and you may buy a self-igniting charcoal even for grills lately, not only for frankincense. Guess it is laced with potassium nitrate and it may complicate things.

Hi Davor,

the yellow iron oxide is the C.I. Pigment Yellow 42 and is a FeO(OH) or Fe₂O₃·1 H₂O, iron III oxyhydroxide. Well, I didn't try this iron oxide but if you bake it at 250 °C (not more than 300 °C), you shouldn't get maghemite (gamma-Fe203). I think, you will get hematite (alpha-Fe2O3).

The red iron oxide is the C.I. Pigment Red 101 and is hematite (alpha-Fe2O3, iron III oxide).

The black iron oxide is the C.I. Pigment Black 11 and is magnetite (Fe3O4, iron II,III oxide).

To test metal detectors, you can use the magnetite without any modification. It's magnetic susceptible.

To get maghemite from the other pigments (yellow, red), one need a messy work. This is the exotherm process with the charcoal power. I have to describe how to do it another time.

Cheers,
Aziz

[Aziz]

Below is the iron II and iron III oxidation process path.


I have followed the long lasting bottom Fe2+ process path:
Green rust -> maghemite.

Note, that the cubic lattice is the high magnetic susceptible state.

Aziz

[Davor]

So in reality you may produce a mixture of magnetically susceptible materials that are quite close to the natural hot rocks by doing a bit of barbecue? That can't be that difficult. I'll try to find (again) some self igniting charcoal, crush it and mix with yellow pigment iron oxide. Its not a BBQ season so it'll take me some time.

Anyway, I think I found a perfect maghemite hot rock stand in: a "normal" cassette tape. It is supposed to come with fine grain magnetic domains and they are not messy. I tried one with my IGSL and it was educational

[Aziz]

Anyway, I think I found a perfect maghemite hot rock stand in: a "normal" cassette tape. It is supposed to come with fine grain magnetic domains and they are not messy. I tried one with my IGSL and it was educational

Yep, the old cassette tape (red/brown) consists of very fine grain maghemite. But it could be difficult to get these today.

BTW, some maghemite is also produced in red/brown bricks. It's the maghemite and magnetite (ferrimagnetic), that makes detecting difficult. Not the hematite (anti-ferrimagnetic).

I have choosen the Fe2+ wet oxidation path to produce the fine grain sized maghemite (nm to µm sized grains). Using tensides (washing powder ) help reducing the grain size.

The charcoal method is dusty, messy and hot.

Aziz