convertion 0.5v-2v to 0v-5v

Using Arduino Project Guidance
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hi all how can i convert analog in (voltage) 0.5v-2v to output 0v-5v
i know that the out will be pwm and i need RC filter
in the hardwer side its easy but i need some helf with the software

thank , netanel

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netanbi:
i know that the out will be pwm and i need RC filter
in the hardwer side its easy but i need some helf with the software

Or just use an op-amp?

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A simple digital way is to analogRead that voltage, and use map() to convert 102-410 (0.5 to 2volt) to 0-255.

analogWrite(pwmPin) = map(analogRead(voltagePin), 102, 410, 0, 255);

Then use an RC filter to smoothen PWM to a voltage.
But that might not be as fast and clean as an opamp.
Need more details.
Leo..

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5

The following Analog Computer may solve your voltage transformation problem which is of the form:

vo = (10/3)*vi - 5/3

Adjustment procedures:
?

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