- #1
Jdo300
- 554
- 5
Hi Everyone,
This thread is a modified continuation of my "Digital Voltage Meter circuit " thread I started a long time ago here:
https://www.physicsforums.com/showthread.php?t=180822
But with a few changes. In this case, I have a large DC capacitor that I want to monitor the voltage on. This capacitor can hold up to 1000VDC across it and I am trying to come up with a simple and safe way to measure the voltage with a microcontroller for processing purposes.
The sensor circuit I want to design has to have a bandwidth of about 50-100kHz and be isolated so that if something goes wrong, my whole board won't go up in smoke! Below I have attached a diagram of how I *think* it could be done. I wanted to get some opinions on this to see if anyone here has any ideas on how this could be done more simply (if even possible).
I did find a 'voltage transducer module' here: http://search.digikey.com/scripts/dksearch/dksus.dll?Detail?name=398-1019-ND which seems like it would work perfectly for my application, but the price made me want to cry :yuck:
It would be great if there was another canned solution out there that was much more affordable, but assuming that there isn't anyone have any other ideas?
Thanks,
Jason O
This thread is a modified continuation of my "Digital Voltage Meter circuit " thread I started a long time ago here:
https://www.physicsforums.com/showthread.php?t=180822
But with a few changes. In this case, I have a large DC capacitor that I want to monitor the voltage on. This capacitor can hold up to 1000VDC across it and I am trying to come up with a simple and safe way to measure the voltage with a microcontroller for processing purposes.
The sensor circuit I want to design has to have a bandwidth of about 50-100kHz and be isolated so that if something goes wrong, my whole board won't go up in smoke! Below I have attached a diagram of how I *think* it could be done. I wanted to get some opinions on this to see if anyone here has any ideas on how this could be done more simply (if even possible).
I did find a 'voltage transducer module' here: http://search.digikey.com/scripts/dksearch/dksus.dll?Detail?name=398-1019-ND which seems like it would work perfectly for my application, but the price made me want to cry :yuck:
It would be great if there was another canned solution out there that was much more affordable, but assuming that there isn't anyone have any other ideas?
Thanks,
Jason O