It is a project for digital logic. Project report requirements: o A brief description of the design process you used to obtain the circuits. Be sure to point out why you chose a particular design, along with the steps you took to minimize the amount of hardware required. This includes ? State diagram ? State reduction ? Final (reduced) state table o Include all design elements, such as truth tables, state diagrams, tables, etc, o Test the device in the simulator. Include a test plan: ? Include your secret code for verification ? Example inputs, expected outputs and what happened when you tested. ? Descriptions, along with a detailed explanation of what simulations you did, what they show, to demonstrate that the circuit works properly under all circumstances. NOTE that all Logisim implementations must meet all labeling requirements, as established at the start of the semester (see Lab 1) Project Description There are many security and access control devices on the market that attempt to prevent unauthorized access to secured areas. One such device is a key-pad based device. To unlock the door, you must enter a secret decimal code. For example, say a device accepts a 4-digit decimal code, 1234. The device will unlock the door when 1234 is entered, but it will not unlock if 123 o
r 123411 is entered. For your final project, you are to design an access control system based on a sequence of 6 bits that accepts a 1-bit at a time, either 0 or 1. This could be implemented with a 2-button keypad (o and 1), used to enter the binary code. A second input functions as the Enter key, which ends the key code entry. As the key is entered, the device outputs Enter = 0 until the input sequence terminates. If the input sequence matches the access code, then output Enter =1 (for example LED lights up), which will unlock the door in a full implementation. The secret code is preset: choose your own code (see below). After two unsuccessful attempts (i.e. the secret code was not matched), the system shuts down and wont accept any more bits, and an alarm is triggered. Thus, your circuit has a second output Alarm, which is set to 1 after two unsuccessful attempts. Extra credit: Add a reset to the system that presumably only the owner could control: when the reset key is inserted, the system is again enabled and can accept bits again. You can code the reset as either 0 (no key) or 1 (key inserted) for this project. Secret code: ? Each of you has their very own secret code: no 2 people in the class can have the same code ? Your code can NOT be a simple sequence of all 1s or all 0s, and must contain a minimum