TOLL BOOTH
Variables and Physical process
In our state machine we have four possible states S0, S1, S2, and S3, each based off our two state inputs, Qa and Qb. Qa and Qb symbolize the binary equivalent to whatever state the machine is in. State 0 is when the gate is closed and there will be an LED signaling the gate is closed. When the Open Switch is manually hit, this triggers the next state, S1, causing the motor to open up the toll booth. The motor will keep running until it hits the limit switch on the top of the booth. When the switch is hit the LED on the board is on showing that the gate is open, S2. The motor will then close when the button is pressed, S3, and the booth will close until it hits the limit. Therefore the outputs are the LEDs lighting up when the gate is open or closed and the motors opening or closing the toll booth arm. For the physical process the arm will open when a button is pressed and will stop when it hits the top limit. When it hits the limit then the arm will stop. It will close when the second button is pressed it will close until the arm hits the lower limit switch.
Conclusion
This final project was a combination of all the skills we have learned this year and showed us how much we have learned. we learned a lot. Daniel, Jack and I all worked very well together, we all took turns and helped explain and work through the problems we faced. Daniel (the VEX master) and I worked on the assembly of the toll booth. We all used our state graphs to create the translation table which we used for our logic expressions which we simplified with Boolean algebra. With our simplified expressions we were able to create our MultiSim, Jack and I took turns while Daniel worked on wiring the breadboard. This project shows the skill be have learned this year, wiring, Boolean algebra, creating circuits on MultiSim and even being able to explain what we have learned in words! When we tried to upload our final design we had a few struggles with correct pin assignments on MultiSim, correct resistors and a few minor wiring issues but at the end we had a functioning toll booth, which is satisfying to use and see how all your hardwork paid off! This project again incorporated all of the components that we have used in our previous projects. We have to create our testing machine, in this case with VEX, like the copy jam project, we also used MultiSim and breadboarding to transfer our circuits just like in so many other projects, however we used our knew understating of state machines to create our cycling toll booth. We were able to use the schematics diagram of the wiring for the chip to make sure we placed our wires and components in the right place. This project was definitely more manageable than in the more beginning of the year, with all our knowledge of circuits, MultiSim and a breadboarding we were very successful with our toll booth! If we did this project again I would budget my time better and look for simple mistakes first, to save us some of the stress we had towards the uploading process.