Using Voltage Divider to Make HV Measurements

[eerocketman]

Hi everyone!

I was just wondering if I could use an RC filter at the output of voltage divider to reduce noise in the readings. I have attached the circuit I have in mind.

Thanks,

Ali

[joeqsmith]

0805s?   

[eerocketman]

Probably several 2512s in series, they were part of the symbol I'm using for resistors.

[Zero999]

It's a reasonable idea. Obviously not with 0805 parts. The voltage and power rating of both (especially the upper) resistor needs to be respected.

Here's a link to a site which a handy calculator for selecting resistor values to use in a potential divider.
http://sim.okawa-denshi.jp/en/teikokeisan.htm

There's no need for another resistor to make the RC filter. The output impedance of the potential divider is equal to both resistor value in parallel, so just choose a capacitor to give the required cut-off frequency.

[perieanuo]

Yes hé can do it with 0805 or even smaller,just put 50-100 in series


Envoyé de mon iPad en utilisant Tapatalk