Title page
Variables and physical process
In our state machine we had four variables,states 0,1,2 and 3 which were based on our state inputs Qa and Qb. Qa and Qb represented what state the state machine would be in. State 0 represented when the gate was closed and signaling a LED to identify when the gate was closed.When the button was pressed it would activate the next state, State 1 which would be when the motor has started opening. The next state, state 2 would be activated when the arm of the toll booth hits the limit switch on the top of the booth telling the arm to stop moving. The next state, state 3 would be activated when the next button is pressed telling the toll booth to close, until it hits the limit switch on the bottom telling the motor to stop. The physical process of the toll booth is when a button is pressed it tells the motor to open until it hits the limit switch stopping the arm from moving. Then when the button is pressed again the arm of the toll booth would start moving down only stopping when the bottom limit switch is hit again.
Conclusion
This project allowed us to apply all of the skills we have learned over this past semester, including Boolean algebra, k-mapping and multisim. Our design process was to create and simplify our state machine using Boolean algebra, after we found our simplified variables we then created the toll booth using vex parts following the picture shown to us on schoology, and our final steps were to create the circuit on multisim along with a circuit on the breadboard to test the circuit. This project is definitely easier then it would’ve been then in the beginning of the year due to us now understanding everything and able to combine everything we learned to solve a problem. Some mistakes that we made was when breadboarding we had some wires in the wrong places for example we had two wires connected to power instead of ground which heated up the chip. However, after looking at the schematic of the circuit we were able to find and fix all of our mistakes a lot easier then we when tried comparing it to the picture of the circuit. Like the copy jam project, we had created our testing machine however with this project instead of using a sliding blocks method we used vex robotics parts. In this project Allie(multisim master) and I worked together on the assembly of the toll booth, and worked together to create a translation table in which we used to find our un-simplified expressions. We each simplified individual expressions, and after this made sure each group member understood how and where we pulled each expression. Then after simplifying our expressions Allie and Jack worked on multisim while I worked on the breadboarding. This group worked extremely well together making sure everyone understood what we were doing and did our best to explain it too the so they understood.