I have to measure 110V DC using a microcontroller(5V). But at the same time I need to keep the microcontroller safe from high voltage.
One method that I know is to use a voltage divider and limiting the voltage using a zener diode. The calculated value of the resistors are R1=210K and R2 = 10K.
Now instead of using a single 210K resistor I can use series of resistor so that if any resistor gets short the voltage will still be in control because of the zener diode.Now what I want to know is that are there any other better ways which can keep the controller safe.
Thank you.
One method that I know is to use a voltage divider and limiting the voltage using a zener diode. The calculated value of the resistors are R1=210K and R2 = 10K.
Now instead of using a single 210K resistor I can use series of resistor so that if any resistor gets short the voltage will still be in control because of the zener diode.Now what I want to know is that are there any other better ways which can keep the controller safe.
Thank you.
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