Maarten,

I wouldn't use op amp on car batteries because of it will amplify the noise
so if you are not going to amplify then that is equal to not using op amp.
what's the purpose of using op amp if your input voltage is higher then 
what you need?


Andre Abelian



Maarten Hofman wrote:

>>>During the Microchip battery seminar, that I attended yesterday, they
>>>recommended to always put an OP196 (?) after your voltage divider (for
>>>which they used resistors in the mega ohms).
>>>      
>>>
>>They can say what they want, but that doesn't absolve you from using your
>>own brain.
>>    
>>
>
>You're absolutely right. I was just copying what they said, because I
>thought it would be useful information for this list. During the
>seminar they seemed to be rather adamant about putting opamps before
>internal A/D converters, and most of the audience happily agreed. I
>myself would probably never use an opamp, but that is equally bad.
>
>I also have to apologize... They did NOT use a 7805, but instead an
>LM3490. However, this doesn't change anything about your useful
>comments.
>
>Greetings,
>Maarten Hofman.
>
>  
>
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