Please bring the Bobrow textbook and your lecture notes to lab to help you with sequential logic circuit design.
Problem: Design and implement a two-button game show detector circuit. A summary of the circuit operation is as follows.
Inputs: Boolean X1, X2 for the contestants' buttons, and CLEAR
Outputs: Boolean Q1, Q2 to indicate which contestant pressed the button first
Initially, Q1 = Q2 = 0
If X1 = X2 = 0 and no button was pressed, then remain at Q1 = Q2 = 0
If X1 = 1 first, then Q1 = 1 and Q2 = 0
If X2 = 1 first, then Q1 = 0 and Q2 = 1
CLEAR input resets the state to Q1 = Q2 = 0
Question: Can you design this circuit using combinational logic only? Please explain.
Wiring the push-buttons: The push-button switches have four pins and have the following characteristics:
Use your ohm meter to determine which pins form each pair of internally connected pins. Also, use your ohm meter to confirm that both pairs of pins are not connected when the switch is not depressed and are connected when the switch is depressed.
Follow the circuit diagram below and construct the switches such that when the switch is not depressed, Vout is 0V, and when the switch is depressed, Vout is ~5V. Instead of the 1 Mohm resistor in the circuit diagram, you may use resistors in the kohm range.
Thank you and have fun.