Hi Jon, Here is a good place to start.
http://pw2.netcom.com/~shammon1/equip.htm  And here are some photos you =
can
look at of a Lehman I built to help get you going.
http://pw2.netcom.com/~shammon1/AptosStn.htm. And yes, you can use led.
Scroll to the bottom of the page in the last URL and you will see the =
specs.

Regards, Steve Hammond, PSN Aptos, California.


-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@............... =
On
Behalf Of jonfr@.........
Sent: Monday, January 21, 2008 10:32 AM
To: psn-l@..............
Subject: Specs for Lehman type sensor


Hi all

I am looking for specs for Lehman type sensor. As I can build a lehman =
type
sensor in my school with an help.

However, the specs I already aren't good, so I need better onces. If =
someone
has them ready. If no one has them, I need to write them up my self.

I need the size and length in cm. I also need a suggestion for the =
material
needed for the mass, I was thinking about using led. But I don't know =
how
good idea that is. For the base of the sensor I was thinking about using
aluminum.

Please send this to my main email address, jonfr [at] jonfr.com

Thanks in advance.

Regards.
J=F3n Fr=EDmann.

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