In this project, we developed a microcontroller based system to control the pH degree of a solution, composed of Acid and base. We based our control algorithm on Fuzzy logic. We also used MatLab to act like the system controller.
Our system consists of three microcontrollers: the first one is a master while the two other are slave. The three microcontrollers are inter connected using I2C bus. One of salves is connected to Acid tank and controls a pump based on level and flow sensor. The Second one is connected to Base tank. The master controller collects data from two slave and transfers its to MatLab running on PC. The master serves as mediator between the Fuzzy logic controller (MatLab) and the two slave microcontrollers to control Acid and Base pumps to get the central pH.