- #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
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
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