Re: TI-H: big music project

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: big music project
From: Firepower5@aol.com
Date: Sun, 15 Nov 1998 14:49:53 EST
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


In a message dated 11/15/98 11:47:48 AM Central Standard Time,
fuzz@pinecrest.edu writes:

> 1) what kind of metal wiring is it that contracts when a current is passed
>  through it?
Flexinol a.k.a. Muscle Wires
>  1a) does it contract to different legths when different voltages are
>  applied?
Can't answer that one, 'cause I don't know.  Check out www.RobotStore.com if
you haven't already.  Also, Rich might know about this.  I think the main
thing that affects how it contracts is actually the amps.  It contracts
because it gets heated up from the resistance, not because of the actual
electricity.
>  1b) how long does this contraction take? is it an instantaneous thing or
>  does it take a second or two?
They contract in one-thousandth of a second or less.  However, they take time
to relax after current is stopped, I believe.

Rob Hornick