Hey Everyone,
I am trying to replicate the schematic shown here: http://wiki.medialab-prado.es/index.php/Algas_Verdes where they use a KE-25 Oxygen Sensor with a TLC272 Op amp. However, I cannot find what V2 or U2 is. My guess is some voltage regulator? Also, does anyone have a good link to understand the op amp with the arduino (with code)? Thanks for any insight.