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Power scaling - Esduino

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bubble_d

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Hi everyone.

I am trying to use the esduino microcontroller to read a voltage from a power supply (+-15) and show it on an soldered on LCD.

I already have the LCD running and showing something for now (From previous code)... but that was the easy part. I know that I will need to scale down the voltage coming out of the power supply so I dont blow the esduino with 15 volts,
but I am unsure how to actually do this. Obviously it will take some circuit design first. Can anyone lead me in the right direction (Software and hardware) in order to achieve this.


Thank you for any help
 

You can use external level shifters for this purpose.
 
You can use a potential divider to divide the voltage into 10 volts and 5 volts, and feed the 5 volts to adc pin of your micro.
 
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