Hardware Lab 4: EEE 120 Design Project Spring 2016 The Application: Gas-Pump Controller Design The Clean Petroleum Company (CPC) is interested in reducing pollution in the atmosphere. When people overfill their gas tanks gas is spilled and evaporates causing air pollution. To minimize this problem, their pumps currently turn off when the back pressure from the gas tank gets too large while the nozzle handle switch is activated (i.e., compressed). They have asked you to design a controller that does the following: If the nozzle handle switch is depressed and the pump pressure sensor indicates low pressure, then allow gas to be pumped. If the pump pressure sensor indicates high pressure then turn-off the pump. (The system clock pulses every one second and you may assume that once the pump shuts off, the pump pressure returns to normal within one second.) Once the pressure returns to normal, allow the pump to be controlled again by the nozzle handle switch. If the pump pressure sensor indicates high pressure a second time, your design will permanently shut down the pump until reset by gas station personnel. (Note that there are two inputs to your synchronous machine: the nozzle handle switch position, and the pump pressure sensor indicator. Your synchronous machine has one output that controls the pump.) All information to complete this design may not be specified. Write down and report any assumptions that you make in your design. Deliverables You are to design two CONCEPTUALLY different finite-state synchronous machines. A design which differs only by the type of flip flop used (e.g., J-K vs. D) or number of states is not considered conceptually different. First, you will need to implement both designs using Logisim and include these simulations into your lab report template. Second, you will need to build ONE design using the TTL parts you used in earlier lab work and report your findings on the lab report template. You can use any part that you have available. The 4-bit D latch that you have not used before might come in handy for the design project. Grading Policy The grade will be allocated as follows: 30% Design Simulation With Logisim 15% for the design of the first circuit and demonstration. 15% for the design of the second circuit and demonstration. 70% Build One Design in Hardware and Lab Report 30% demonstration of one design in hardware. 11% for documentation in the report of how the first circuit performs the application. 11% for documentation in the report of how the second circuit performs the application. 5% for establishing reasonable criteria for picking one design as the \"best\" design. (The one design you build in hardware does not need to be the \"best\" design.) 8% for picking a preferred, \"best\" design. 5% for following report-writing guidelines. 5% (Extra Credit) Completed Self-Assessment Worksheet 1