Re: Will this circuit work, and how much power will I need?

From: smpaladin (smpaladin_at_yahoo.com)
Date: 10/18/04 

Date: 18 Oct 2004 15:56:08 -0700

"Rheilly Phoull" <Rheilly@bigpong.com> wrote in message news:<2th766F1v9sdiU1@uni-berlin.de>...
> "smpaladin" <smpaladin@yahoo.com> wrote in message
> news:6753235c.0410171702.de6d3c6@posting.google.com...
> > This is a depiction of a circuit that I am planning to make.
> > http://www.geocities.com/smpaladin/maglevcircuit.gif
> >
> > It is a linear motor; Whenever a magnet is passed over the hall
> > sensor, it turns on the Power transistor, and therefore turns on the
> > Electromagnet coil. In the picture, there are only four sets of the
> > hall sensor/transistor/coil. In the real circuit, I am planning on
> > having 12 sets of them.
> >
> > So will this circuit work properly? And how much power will I need?
> > You would think that the circuit would need a lot of power, but then
> > you realize that only one set of the hallsensor/transistor/coil will
> > be turned on at any one time.
> >
> > Any advice is greatly appreciated.
>
> OK, so all you really want to know is the current for one section. No one
> can tell you unless the details of the coil and battery are shown. I.e
> battery voltage and details of the coil. Always include that sort of info
> when asking this type of question. Also what the device is required to do
> usually helps anyone answering.

Each coil consists of 15 ft of magnet wire (i'm not sure what type of
magnet wire, but its slightly thicker than thread) wrapped around a
1/4 inch thick screw. The coil should be strong enough to attract and
get a hold onto a similar sized screw from about 1/4 inch away (That
works with one set of hallsensor/transistor/coil, but the question is
will it work with 10 sets connected to eachother).

The transistors are PNP TIP106, and the hall sensors are PNP 21E.

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