[Prev][Next][Index][Thread]

Re: Hall effects probe



There are two main types of hall effect devices available, what you want is
an analogue probe.
A Hall probe is simply a rectanular plate of semiconductor material. A DC
voltage is applied across two opposite edges. The output signal is taken
from the remaining two edges. An applied magnetic field deflects the flow of
electrons travelling between the input electrodes, producing a dc signal
betweeen the ouput connections. The level is low and high impedance, it
needs amplifyoing before it is any use for measurement, a single op-amp is
sufficient. Because of the low level, the output leads need to be screened.
You will then of course need a suitable analogue to digital converter to
interface with your computer.
I must admit that it is some years since I designed a circuit for a
magnetometer using one, and the supplier I then used no longer stocks Hall
devices. A major components stockist may be able to help, it will be a
matter of searching some on-line catalogues.
----- Original Message -----
From: Tesla List <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, March 25, 2000 2:20 PM
Subject: Hall effects probe


> Original Poster: "Nathan Ball" <nateburg-at-hotmail-dot-com>
>
> Hello again
>
> Just thought i might try again on this since nobody answered last time...
>
> What exactly is a hall-effects probe and where can I get some? My
> CSE-studying cousin will help me with some programming so I can use an
> interface card on my computer and measure and model the magnetic field on
my
> coil, since this is apparently something that a hall-effects probe can
help
> me do.
>
> Has anybody else done this?
>
> Thanks,
> Nathan B
> ______________________________________________________
> Get Your Private, Free Email at http://www.hotmail-dot-com
>
>
>