Measuring voltage from a current transformer

[Darrel Taylor]

what effect will you experience if you were to have an inductive load on the primary with a precision rectifier on the secondary?

You would get the wrong amperage reading.

If you calibrated the device with a resistive load, so that it reads the correct current with light bulbs etc. When you plug in an inductive load like a motor, the readings will be much lower than they should be. They will vary from one inductive load to the next. And even the same load at different current levels will be in error by different amounts.

If you plug in a Light Dimmer, Motor Soft-Start or speed control, The thing will go absolutely NUTS from the "Chopping" of the SCR or Triac.

All of those problems are resolved by using the RMS converter. Which gives the correct amperage under ALL conditions.
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[docwisdom]

Cool,
Ill give the RMS converter a shot.

-edit-
seems LTC1966 is discontinued.
found this http://search.digikey.com/scripts/Dk...me=AD736JNZ-ND

[Darrel Taylor]

seems LTC1966 is discontinued.

Hmmm, well that's unfortunate.
I really liked that chip.

I'm sure any other "True RMS to DC" converter will do just as well. It's the RMS that counts.
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[CocaColaKid]

The LTC1966 does not appear to be discontinued just not in stock. DK can have one in a couple of days.

[docwisdom]

hm, cant seem to find the page where I saw the word discontinued.

anyway. what do you do to put the smd on a breadboard?

[mackrackit]

what do you do to put the smd on a breadboard?

Look at how the Basic Stamp is put together.
http://www.parallax.com/Portals/0/Im...ller/fig1b.gif
Put the SMD on a small board with a header. Plug that into the bread board.