1. Design a Moore-type circuit (outputs depend on current state only) to implement the system described below. The system has 3 inputs and 2 outputs.

Inputs:

CLK - represents the system clock. Use BTN1 on the Basys 2 board (Figure 3 shows button-to-pin mapping on the Basys 2 board).

a, b - coin selection inputs specified in the table below. Use SW1 and SW2, respectively (Figure 1 shows switch-to-pin mapping).

a	b	Description
0	0	Do nothing
0	1	Received $0.05
1	0	Received $0.10
1	1	Received $0.25

Outputs:

f, g - action taken outputs specified in the table below. Use LED1 and LED2, respectively (Figure 2 shows LED-to-pin mapping).

f	g	Description
0	0	Dispense a water
0	1	Give $0.05 change
1	0	Give $0.10 change
1	1	Do nothing

Details about the design:

1. The price of a water is $0.15.

2. The machine can accept $0.25, $0.10, and $0.05 coins.

3. The machine dispenses a water as soon as it has received $0.15 or more.

4. If the amount received exceeds $0.15, then return the correct change to the customer.

5. SHOW KMAPS

You may wish to write the Verilog code for your design prior to the lab, but this is not required.