Date: Tue, 21 Feb 2012 10:17:37

Author: George Herold

Subject: Re: RLC circuits

Post:

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Hi Dave, You may want a 2nd R as a 'source' impedeance. (Feed the LRC
as low impedance voltage source or high impedance current source.) =20
=20
I'd try a design that leaves lots of room for students to make mistakes.
(The only time I really learn somethng is when I first do it wrong.) I
know this doesn't 'fit' with limitied time labs.
=20
George H.


________________________________

From: tap-l-owner@lists.ncsu.edu
[mailto:tap-l-owner@lists.ncsu.edu] On Behalf Of david kardelis
Sent: Monday, February 20, 2012 1:46 PM
To: Physics Group
Subject: [tap-l] RLC circuits
=09
=09
I finally made a set of RLC circuits with 3 identical circuits
but a different component connected to ground in each. They can measure
the voltage and phases of any component or the whole circuit without
flipping leads or inverting signals on the Oscope.
=09
I would like to get your opinion: I have 2 types. The first
type, you can see all 9 components and how they are hooked together and
how the terminals you connect the scope to the circuit are connected.
Type 2 has only 3 components visible, the others are hidden inside the
box. The setup makes it look like the 3 components are actually hooked
together in series and the terminals connect to the points in between
the components.=20
=09
Type 2 looks cleaner,. It may avoid confusion on scope hook ups
and issues with scope grounds. They can look at impedance, phase angles
and resonance in a more straight forward way. Feel like I am hiding
something, which I am to avoid confusion=20
=09
Type 1 allows the same analysis but all the visible leads could
lead to confusion. It would be a little more open ended in that a
curious student could look at a combined LC, RL or RC voltage.
=09
dave
=09
=09
=09
=09
=09


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Hi Dave, You may want a 2nd R as a 'source' =
impedeance. =20
(Feed the LRC as low impedance voltage source or high impedance current=20
source.)

I'd try a design that leaves lots of room for students to =
make=20
mistakes. (The only time I really learn somethng is when I first =
do it=20
wrong.) I know this doesn't 'fit' with limitied time=20
labs.

George=20
H.



From: tap-l-owner@lists.ncsu.edu=20
[mailto:tap-l-owner@lists.ncsu.edu] On Behalf Of david=20
kardelisSent: Monday, February 20, 2012 1:46 =
PMTo:=20
Physics GroupSubject: [tap-l] RLC =
circuits
I finally made a set of RLC circuits with 3 identical =
circuits but=20
a different component connected to ground in each. They can measure =
the=20
voltage and phases of any component or the whole circuit without =
flipping=20
leads or inverting signals on the Oscope.I would like to get =
your=20
opinion: I have 2 types. The first type, you can see all 9 =

components and how they are hooked together and how the terminals you =
connect=20
the scope to the circuit are connected. Type 2 has only 3 =
components=20
visible, the others are hidden inside the box. The setup makes it look =
like=20
the 3 components are actually hooked together in series and the =
terminals=20
connect to the points in between the components. Type 2 looks=20
cleaner,. It may avoid confusion on scope hook ups and issues with =
scope=20
grounds. They can look at impedance, phase angles and resonance in a =
more=20
straight forward way. Feel like I am hiding something, which I am to =
avoid=20
confusion Type 1 allows the same analysis but all the visible =
leads=20
could lead to confusion. It would be a little more open ended in that =
a=20
curious student could look at a combined LC, RL or RC=20
voltage.dave

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