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Design >> Analog Design >> Current Transformers
https://designers-guide.org/forum/YaBB.pl?num=1104728228

Message started by sardineta on Jan 2^nd, 2005, 8:57pm

Title: Current Transformers
Post by sardineta on Jan 2^nd, 2005, 8:57pm

Hello everyone! have a happy new year!!!

I have a current transformer which generates an induced AC signal: 60 Hz Amplitud may vary from 0 to 10V. The transformer has a resistance of 900 ohm

http://my.netomat.net/sardineta/Current_Transformer

I would like to read this signal in order to get it into an ADC. The ADC I will use is inside a microcontroller, PIC16F870.

I have already done a circuit, but I think it requires a special attention that I don't know.

I am not sure if the design of the differential amplifier is correct and also I would like some advices to create the layout, I did one but it does not work well.

I did it in a protoboard and worker well but in the layout it fail, I will upload the layout latter, i don't have the file right know.
other questions are:

Does the power supply is right?
The differential amplifier and all other circuits are right?
what consideration to create the PCB I have to take?

Here is the project
http://my.netomat.net/sardineta/Current_Transformer

Thanks in advanced, I will appreciate your help!