In: Electrical Engineering
Design a “disk spinning” animation circuit for a CD player. The
input to the circuit will be a 3-bit binary number A1, A2, A3
provided by 3-bit up counter. The circuit for 3-bit counter has
already been provided in CCT file on Google Classroom, so there is
no need to design the up counter yourself.
The animation will appear on the top four lights of the LED display
of Figure, i.e., on X1, X2, X7, and X6, going clockwise as shown in
Figure 1.
Figure 1 Seven Segment Indicator
The animation should consist of a blank spot on a disk spinning
around once, beginning with X1. Then, the entire disk should blink
on and off twice. The pattern is shown in figure 2.
Figure 2 Disk Spinning Pattern
You have to design a circuit that must use two 2x1 multiplexers,
and two 4x1 multiplexers in the design. You may also use logic
gate(s) in the design.
(a) Draw the truth table for the circuit below. The truth table
must cover all the possible cases. Stick to the notations use in
the question.
(b) Drive the input equations for the multiplexers.
(c) Implement the same circuit on LogicWorks. The output of the circuit must be shown through 7Seg Disp component in the LogicWorks. There is no restriction on the selection of 2x1 mux and 4x1 mux variants available in the LogicWorks. You have to connect the up-counter circuit already provided to you with your designed circuit