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Multiplay current circiut

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barbar

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I am looking for a simple circiut that multiplay test current by knowing factor, for testing battery time life:?:
 

Convert test current to voltage (using a resistor) and use common voltage to current converter to generate required current.
I(test) * R =U(test)
Take U(test) =Vin .. See attached picture (LM324 does not need +/- supply; it will happily work of 0-12V) ..
, and multiplication factor is hidden in R and Re ..
Regards,
IanP
 

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