Hello:
My knowledge of electronics is somewhat limited, and would appreciate some help on this schematic. the first stage (gain ~5x)is borrowed from a schematic for a PH measurement circuit. I replaced the inverting second stage with a buffer which feeds a pic.
I am wondering if there should be any changes or improvements in the design. So far it seems to work, but would appreciate a second opinion. Not confident I have the right values for the resistors and capacitors, or the correct noise filtering included.
![ORP.JPG ORP.JPG](https://www.electro-tech-online.com/data/attachments/35/35665-21cdff15e52e60d4b132d2ecb2a0efd1.jpg)
-=Bryan=-
My knowledge of electronics is somewhat limited, and would appreciate some help on this schematic. the first stage (gain ~5x)is borrowed from a schematic for a PH measurement circuit. I replaced the inverting second stage with a buffer which feeds a pic.
I am wondering if there should be any changes or improvements in the design. So far it seems to work, but would appreciate a second opinion. Not confident I have the right values for the resistors and capacitors, or the correct noise filtering included.
![ORP.JPG ORP.JPG](https://www.electro-tech-online.com/data/attachments/35/35665-21cdff15e52e60d4b132d2ecb2a0efd1.jpg)
-=Bryan=-