I've been looking into making a pH sensor circuit with an atmega168. I have learned that I needed to use op amps to amplify the voltage from the pH and have an offset in order to ensure I have no negative values.
I finished the circuit and now I am looking for parts.
I need a +/- voltage regulator for the op amps right?
I haven't found any for +/-3.3V as I would hope. With 5V I haven't found any parts I could solder.
Anyone work with op amps in low voltage devices that can give me any suggestions?
Thanks in advance.