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Topic: 12v variable to 5 volt scaling (Read 527 times) previous topic - next topic

JHEnt

I get how to take 12v and use a transistor to act as a 5 volt switch with iverted activation for on/off logic input but how do you take a 12 volt variable resistor type signal and convert it down to a 5 volt signal to use for analog in?

Have a pressure transducer and ultrasonic sensors that both work on 12 volt signal scales and would like to use with Arduino.
Thanks

RuggedCircuits

Are you just looking for a basic voltage divider?

http://en.wikipedia.org/wiki/Voltage_divider

That will reduce a 12V signal to 5V, given appropriate resistor choices.

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