Date: Wed, 23 Feb 2011 14:46:22

Author: Thomas J. Bauer

Subject: Re: Hallway Display Cases and Demonstrations at Cal Poly Pomona

Post:

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Hi Paul,

Try an interval timing Relay. You set how long the relay is on after power
is applied to it.
See McMaster-Carr

http://www.mcmaster.com/#timing-relays/=b5ti5s

Tom Bauer
Wellesy College.

tap-l@lists.ncsu.edu writes:
>I now have a display case with power and adjustable shelves. I need to
>create a list of displays that can be shown at different times throughout
>the year. I’d like them to be interactive, but I worry about middle
>school and high school kids putzing in ways that might cause breakage.
>
>Does anyone have any tips for creating a momentary switch that couldn’t
>be taped down by a high school kid? The warnings given below
>(ferrofluids and high current) would be taken as a challenge to some of
>our more daring students.
>
>Any thoughts would be appreciated.
>
>Â
>
>Â
>
>Â
>
>
>
>
>Paul Lulai
>
>Physics Teacher
>
>St Anthony Village S.H.
>
>3303 33rd Ave NE
>
>St Anthony Village, MN 55418
>
>Â



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Hi Paul,

Try an interval timing Relay. You set how=
long the relay is on after power is applied to it.
See McMaster-Carr

http://www.mcmaster.com/=
=23timing-relays/=3Db5ti5s

Tom Bauer
Wellesy College.

tap-l=40lists.ncsu.edu writes:
I now have a display case with power and adjustable shelves.=
=C2=A0 I need to create a list of displays that can be shown at different t=
imes throughout the year.=C2=A0 I=E2=80=99d like them to be interactive, bu=
t I worry about middle school and high school kids putzing in ways that mig=
ht cause breakage.

Does anyone have any tips for creating a momentary switch tha=
t couldn=E2=80=99t be taped down by a high school kid?=C2=A0 The warnings g=
iven below (ferrofluids and high current) would be taken as a challenge to =
some of our more daring students.

Any thoughts would be appreciated.

=C2=A0

=C2=A0

=C2=A0




Paul Lulai

Physics Teacher

St Anthony Village S.H.

3303 33rd Ave NE

St Anthony Village, MN 55418

=C2=A0





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From tap-l-owner@lists.ncsu.edu Wed Feb 23 16:28:15 2011