Metal detection
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Can anybody point me to a very cheap metal detection kit that is easy
to hook up to a basic stamp 2. I don't need anything fancy just
something that uses one IO pin and gives a high (or a low) when a
metal object is detected.
to hook up to a basic stamp 2. I don't need anything fancy just
something that uses one IO pin and gives a high (or a low) when a
metal object is detected.
Comments
The metal you are deteting becomes the iron core. So just send a
freq through the one coil and watch the second one. As metal nears
it the secondary will rise in (current?). Contiion it through an op-
amp or two and your done with a *basic* MD.
--- In basicstamps@yahoogroups.com, "icelandicsage <asbi@m...>"
<asbi@m...> wrote:
> Can anybody point me to a very cheap metal detection kit that is
easy
> to hook up to a basic stamp 2. I don't need anything fancy just
> something that uses one IO pin and gives a high (or a low) when a
> metal object is detected.
> A basic metal detector is just a transformer without the iron core.
> The metal you are deteting becomes the iron core. So just send a
> freq through the one coil and watch the second one. As metal nears
> it the secondary will rise in (current?). Contiion it through an op-
> amp or two and your done with a *basic* MD.
There are some very inexpensive detectors called "Little
Wizards" I belive... the poster might be able hack one of them
since they give a tone frequency when metal is detected and it's
usually not too tough to tie into the speaker circuit and detect
when a frequency is present.
Michael Burr
get to e-bay, they have an official Buzz LightYear going for $15.00 !
Your home brew can take on galactic proportions !
Dave
--- In basicstamps@yahoogroups.com, Michael Burr <mburr@b...> wrote:
> anode505 wrote:
>
> > A basic metal detector is just a transformer without the iron
core.
> > The metal you are deteting becomes the iron core. So just send a
> > freq through the one coil and watch the second one. As metal
nears
> > it the secondary will rise in (current?). Contiion it through an
op-
> > amp or two and your done with a *basic* MD.
>
> There are some very inexpensive detectors called "Little
> Wizards" I belive... the poster might be able hack one of them
> since they give a tone frequency when metal is detected and it's
> usually not too tough to tie into the speaker circuit and detect
> when a frequency is present.
>
> Michael Burr
--- In basicstamps@yahoogroups.com, "Dave Mucha <davemucha@j...>"
<davemucha@j...> wrote:
> It may be too late, the Little Wizzard is about $20.00 but if you
can
> get to e-bay, they have an official Buzz LightYear going for
$15.00 !
>
> Your home brew can take on galactic proportions !
>
> Dave
>
> --- In basicstamps@yahoogroups.com, Michael Burr <mburr@b...> wrote:
> > anode505 wrote:
> >
> > > A basic metal detector is just a transformer without the iron
> core.
> > > The metal you are deteting becomes the iron core. So just send
a
> > > freq through the one coil and watch the second one. As metal
> nears
> > > it the secondary will rise in (current?). Contiion it through
an
> op-
> > > amp or two and your done with a *basic* MD.
> >
> > There are some very inexpensive detectors called "Little
> > Wizards" I belive... the poster might be able hack one of them
> > since they give a tone frequency when metal is detected and it's
> > usually not too tough to tie into the speaker circuit and detect
> > when a frequency is present.
> >
> > Michael Burr
suggestions.
--- In basicstamps@yahoogroups.com, "anode505 <anode505@y...>"
<anode505@y...> wrote:
> And then again, how about a proxswitch?
>
>
> --- In basicstamps@yahoogroups.com, "Dave Mucha <davemucha@j...>"
> <davemucha@j...> wrote:
> > It may be too late, the Little Wizzard is about $20.00 but if you
> can
> > get to e-bay, they have an official Buzz LightYear going for
> $15.00 !
> >
> > Your home brew can take on galactic proportions !
> >
> > Dave
> >
> > --- In basicstamps@yahoogroups.com, Michael Burr <mburr@b...>
wrote:
> > > anode505 wrote:
> > >
> > > > A basic metal detector is just a transformer without the iron
> > core.
> > > > The metal you are deteting becomes the iron core. So just
send
> a
> > > > freq through the one coil and watch the second one. As metal
> > nears
> > > > it the secondary will rise in (current?). Contiion it
through
> an
> > op-
> > > > amp or two and your done with a *basic* MD.
> > >
> > > There are some very inexpensive detectors called "Little
> > > Wizards" I belive... the poster might be able hack one of them
> > > since they give a tone frequency when metal is detected and
it's
> > > usually not too tough to tie into the speaker circuit and
detect
> > > when a frequency is present.
> > >
> > > Michael Burr
> There are some very inexpensive detectors called "Little
> Wizards" I belive... the poster might be able hack one of them
> since they give a tone frequency when metal is detected and it's
> usually not too tough to tie into the speaker circuit and detect
> when a frequency is present.
Forgive the regression back to this discussion, but I thought
the original poster would be *very* interested in this months
(Februrary) issue of Nuts and Volts... especially the article
"Build a Poor Man's Metal Detector" :^)
Looks like a very intresting project with the capibility to
detect a dime an ~ 1 inch.
Michael Burr
Our government it seems has got a new plan...
Seize and search the private records of every man.
No warrants, no judges, no due process required,
With "Homeland Security" the 4th Amendment's retired.
"Total Information Awareness" the project is called,
Oh would our forefathers be aghast and appalled!
http://geocities.com/totalinformationawareness/