741 question

shteii01

Joined Feb 19, 2010
4,644
Hello to all and thanks for your help,

this is a home project. I use voltage from current transformer to detect when U < 0,08 V. I tried to do it with op amp and comparator function (PIC microcontroller). I have to amplify AC signal several times for PIC comparator.
Is ADC better way of sensing this low voltages? Is there PIC microcontroller which can work with 80 mV AC signal?

thanks,
If your 0.08 V AC signal is centered on zero.

If you are only looking for positive portion of 0.08 V.

Then you will only see 0.04 V at most. So you will always be less than 0.08 V.



ADC will not help you much because I doubt there are many ADC that are designed for inputs in millivolts. I bet such ADC are specialty items and expansive.
 
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