Hello all
Can i use a DC Voltage Sensor Module (VS.DC2) to measure voltage higher than 25 V and use a voltage divider to make the output voltage suitable for esp32 or this voltage sensor could be damaged by voltage higher than 25 V.
Thanks in advance.
It is not a sensor, it just a voltage divider.
Nothing will happen to the module itself, but if the input voltage is more than 25V, its output will be more than 5V, and this can lead to damage to the Arduino.
You can easily replace this "sensor" by voltage divider you make yourself.
What do you suppose the purpose of those 2 resistors on the board might be? 
I just wanted to make sure that these resistors in the voltage divider can withstand high voltages,so i can take the output of the module which can be higher than 5 V and connect it to another voltage divider on breadboard to step it down to a safe voltage for the esp32.
Why do you need this module as intermediate step?
Why not to make a voltage divider that will convert your input voltage to 0..3v3 range in a single step?
You can just calculate the ratio from the values of the two resistors then change one of them to make it work on the voltage you want within reason. I see 7.5K and 3K. This link may help you.
Because am using a breadboard and i cant connect these high voltages to it, so it will make the connection more complicated and require soldering, However you are right i will make a potential divider directly and avoid the fuss.
Thank you.
OK, no you should not apply any voltage exceeding 25 volts. Why? Because it's a voltage divider and as we increase the voltage across the divider, what happens to the current? Fixed resistance so if we increase the voltage the current will increase. We can't exceed the power ratings of the resistors.
Not sure what you are after? If all you are looking to do is reduce a voltage I would just build my own divider for the range you want.
Ron
The resistor values and types are visible in the photo. You can easily see that your concerns are unfounded.
May I ask how high the voltage is???
Above 50V things get dangerous. Above 100V you may die.
Where does this voltage come from? Is it referenced to earth ground???
My guess is that the board will fail above 1000V or so...(due to arcing).
Yes it can be damaged