![]() The Arduino then senses the speed of the motor using a photodiode fixed under the motor. The Arduino controls a transistor with PWM to drive a high, controlled current through a motor attached to the stirrer. The Stirring Subsystem uses an Arduino connected to a circuit with a motor. I succeeded in producing the desired Stirring Subsystem that can regulate a stirring motor to spin at a setpoint within 500-1500RPM to an accuracy of +-20RPM. I was the Stirring Subsystem leader and thus designed the full stirring subsystem. The project involved three subsystems: the stirring subsystem, pH subsystem and heating subsystem. In this Bioreactor project, we did not have access to physical components due to the COVID-19 pandemic. ![]() ![]() distribution to rural areas, shipping, risks from local extreme weather conditions or political events, etc). Moreover, in the context of producing and distributing TB vaccines, I considered the non-technical factors surrounding the project and informing the design of our system in a follow-up individual report assignment (e.g. This is a "Bioreactor" in the context of regulating the conditions of a yeast solution to make a Tuberculosis vaccine. ![]() The project involved designing and programming the circuits and control systems necessary to regulate the internal stirring speed, pH and temperature of a liquid in a closed system. ![]()
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