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Topic: increase ADC voltage on Arduino Due  (Read 283 times) previous topic - next topic

steven2010

Hi
I'm a newbie and trying to read an analog sensor which gives 0~5 Volts at the output. The uC is DUE and as you all know its dc level is 3.3 volts. Can you give me a hint how to increase the ADC level to 5 so that I could read more range from the sensor?

Unofortunately i cannot switch to another uC such as UNO, ...

Thanks

steve_mcdonald

Could you consider using an op-amp set up with negative gain to compress the 5v signal into a 3v3 window?

hammy

You just need a simple resistor divider to reduce the voltage from 5 to 3.3volts.
Google this :

Or... (ignore RL in the example, and aim for something in the like 10k for one of the resistors https://www.google.co.uk/search?q=voltage+divider&ie=UTF-8&oe=UTF-8&hl=en-gb&client=safari#imgrc=6EuX4-yIyXVbVM:


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