Design a soda vending machine, Mechanical Engineering

Design a soda vending machine that can deliver three kinds of soda, A, B and C. All the three soda cost the same amount - 70 cents. The vending machine has four coin slots, one each for nickel (N = 5c), dime (I = 10c), quarter (Q = 25c) and dollar (D = 100c). Coins are inserted into the machine one at a time in any order.

1918_Design a soda vending machine.png

The machine should take coins until 70 cents or more has been put in. When this occurs, the machine should wait for the choice of the soda A, B or C. After the choice is made, the machine is ready for vending. The machine should indicate vending by turning on one of the lines A_O, B_O or C_O for 1 second. During this time the machine cannot accept any coins. After 1 second, the machine is ready to accept coins again. The machine does not return any change. The machine should be a Finite State Machine (FSM) operating with a 100 Hz clock. The machine should have a reset input (R), which when pressed and released puts the machine in READY mode. Whenever this happens, the machine should display the total amount accumulated since last reset. Also, the internal amount accumulated is reset to zero cents.

You can assume that the soda cans are unlimited in number.

Write a VHDL code that implements the above soda machine. You have to turn in the following:
 
1. A state diagram showing the implementation of your design. Clearly show all the states and the conditions on which transitions occur.

2. Hardcopy of your VHDL code and the testbench.

3. Hardcopy of annotated waveforms that show at least the following cases:

(a) Normal operation of soda vending, showing the order in which the coins are inserted,  the state transitions and the vending process. Show that your machine does not accept coins when the machine is vending.

(b) Show the reset operation after a few sodas are vended, clearly displaying the total  amount accumulated and the state change.

Posted Date: 4/1/2013 5:37:44 AM | Location : United States







Related Discussions:- Design a soda vending machine, Assignment Help, Ask Question on Design a soda vending machine, Get Answer, Expert's Help, Design a soda vending machine Discussions

Write discussion on Design a soda vending machine
Your posts are moderated
Related Questions
A biaxial rosette is shown at right. Derive equations to correct for transverse sensitivity effects for the case in which the two strain gage elements exhibit different gage factor

What is entropy microscopically

Q. Plant layout and equipment spacing? Layout refers to the location of plants (and process/power units within the plants and associated utilities (or balance of plant)) as wel

Q. Design Pumps for plant layout? Pumps handling flammable or combustible materials are relatively frequent sources of leakage and should therefore be located as far as practic

Compare solid shaft with the hollow: Compare solid shaft with the hollow shaft, by strength and their weight. Sol.: ( a ) Comparison by strength: Assume that both the s

What is tetra & octahedral voids & how are they formed ?

What are the different theories of failure under static load, explain briefly? The major theories of failure of a member subjected to bi-axial stress are as below: > Maximu

A 1.2 m diameter steel pipe carries oil of relative density 0.822 under a head of 70 m of oil. What minimum thickness of 120 MPa (yield stress) steel would be required for a safety

The following data was obtained from an orthogonal cutting test : Rake angle = 20o, Depth of cut = 6 mm Feed rate = 025 mm/rev Chip length before cutting = 29.4 mm Chip

Centrifugal Filter and Screen Filter Cleaning :   Oil may contain impurities. Since the oil passes through all the engine parts, the impurities may harm the parts and cause imprope