One interesting thing about our design was that we were able to code the different angles we wanted the motor to turn. We had different cases based off user input that selected which angle to use. We then had a variable in each of those cases to store the degrees chosen, so that the return motor function would know how far to come back so that the catapult could be shot again.
As you can see in the image above, the red arrow is pointing to our motor, which is being used to pull back the catapult’s arm. The yellow arrow is pointing to our Atmega328PB which is sending out our signals to the solenoid and the Big Easy Driver. The blue arrow is pointing to the Big Easy Driver which is controlling the motor. The green arrow is pointing to the solenoid which is acting as the release mechanism. Below is the schematic to make it all work.
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The goal of performing this project was to encompass learning objectives acquired throughout the duration of this course. We wanted to use a motor to pull back the arm of a catapult and have a solenoid be the release mechanism. The project was successful. When we pressed the appropriate key, the motor would pull back the arm and the solenoid would retract.