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You are here: Home / Replies / use voltage divider resistor

use voltage divider resistor

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Microcontroller › AVR › main supply voltage display using atmega › use voltage divider resistor

September 16, 2014 at 5:57 pm #12197
Ashutosh Bhatt
Participant

use voltage divider resistor network. use resistors with 2W ratings.

calculate resistance values as to get the range of 0 – 230 into 0-5 V.

sense the voltage using internal or external ADC. multiply it with reverse of voltage divider ratio and thats it 

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