An amp meter has to be connected in series with the circuit.
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At 05:45 PM 2/13/2016, you wrote:
I have built the ammeter described on the site using a full wave bridge
rectifier as described on the website. I am using a 4 amp Vishnay
kBU4D rectifier. My two busses are red and black.
In following the directions I attach the red wire from my digitrax
zephyr to my track and connect the red input to the rectifier to
that track.(described as "TO A DCC RAIL" on the site.) I
connect the black wire input to the rectifier to the black output of the
Digitrax dcs 51. I assume that is what it means for me to do when
it says connect the other input to the rectifier "TO CORRESPONDING
BOOSTER CONNECTION." When there is an engine on the track this
should run the circuit through the meter, I think.
I keep my black lead plugged into COM on my meter and plug my red lead at
the "10A" input jack.
When I do this my digitrax zephyr shorts out.
Any idea what I am doing wrong? (Apologies for not being an
electronics expert, but learning)