Re: [Phys-l] Step down transformer trouble

["Paul Lulai" <plulai@stanthony.k12.mn.us>]

It is a transformer designed to drip 120Vac to 16Vac. I believe the only item on the circuit is the bell, so the 16 volts at the transformer should only drop across the bell.

Paul Lulai
Physics Teacher
St Anthony Village Senior High
3303 33rd Ave 
St Anthony Village MN 55418

(w) 612-706-1146




----- Reply message -----
From: "Dr. Keith S. Taber" <kst24@cam.ac.uk>
Date: Wed, Jul 6, 2011 10:37 am
Subject: [Phys-l] Step down transformer trouble
To: "Forum for Physics Educators" <phys-l@carnot.physics.buffalo.edu>

Just a thought, but is the 16V measured on open circuit, or when the 
bell is connected up?

Keith



At 05:58 -0400 6/7/11, Paul Lulai wrote:
> Hi.
> We can't keep our doorbell stepdown transformer working.  I thought 
> i would check this group for thoughts.
> The transformer drops to 16v.  That matches the input for our 
> doorbell. The transformer is connected to ground and both the black 
> and white house wires (as directed on installation instructions). 
> It is installed onto a standard junction box with (which has a cfl 
> attached).
> I've changed transformers multiple times.  I checked the doorbell. 
> I found no problem, but thought a $20 change of bells might so it, 
> so I changed it anyway (after the 2nd transformer).
> Any thoughts?
>
> Paul Lulai
> Physics Teacher
> St Anthony Village Senior High
> 3303 33rd Ave
> St Anthony Village MN 55418
>
> (w) 612-706-1146
>
>
> _______________________________________________
> Forum for Physics Educators
> Phys-l@carnot.physics.buffalo.edu
> https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l


-- 
Dr. Keith S. Taber

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http://people.pwf.cam.ac.uk/kst24/

Author: Progressing Science Education - Constructing the Scientific 
Research Programme into the Contingent Nature of Learning Science 
(Springer: 2009)

University Senior Lecturer in Science Education

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