Motor can do partial rotation, it can be controlled to release in the step of a wedge which is equivalent to approximately an ounce of food. The motor has been successfully integrated with the power supply, we no longer have overheating issue and the motor is receiving the appropriate current and voltage. We will be using one power supply, it is to power the stepper motor, touch screen and liquid dispensing mechanism. The liquid dispensing mechanism has not yet been finalized due to current issues is being work on. The pump currently has inconsistent peaks of current; therefore, not dispensing the exact amount of liquid each time. It is off by +/- a quarter of a milliliter. For this application, a milliliter is crucial to achieve as we only have two setting, 1 ml for small dog (5lb – 29lb) and 2 ml for a medium dog (30lb – 60lb). Some of the set up tried have been buck (DC -DC converter) and relay, buck and transistor combination and added a resistor that kept the current and voltage ON all the time, there was still inconsistencies in the current. Next step is to work on new component that takes in AC and output 5V 0.5A but cannot be regulated as seen from the specification and consider a pneumatic solenoid valve. Subsystem 3 has made some detail addition to the model, the next set for this subsystem is to consider water-jet fabrication shop, incorporating 4 motors or solenoid valve and finalize cartridge design. Lastly controls subsystem, we have switch to a touch screen and we have images on the screen as well as mapping for sensing location. Next steps are to work on keyboard and switching screens by touch triggering instead of time based. We have achieved great progress so far!

Integrated Pet Feeder for Health and Wellness, Sandy Moreno