Objective Design a gumball machine control logic, including the finite state machine and circuit design. Problem Statement The gumball machine delivers a piece of gum after receiving 15¢ in coins. The machine has a single coin slot that accepts nickels and dimes, one coin at a time. A mechanical sensor indicates to the control whether a dime or a nickel has been inserted into the coin slot. The input N is asserted when a nickel is inserted into the coin slot. D is asserted when a dime is deposited. The machine asserts OPEN for one clock period when 15¢ or more has been deposited since the last reset. Then the controller's output causes a single piece of gum to be released down a chute to the customer. The machine does not give change. A customer who pays with two dimes get a piece of gum, but overpays 5¢. Coin Gum Gum release sensor dispenser mechanism FSM Reset CLK • Nis asserted for 1 clock period when a nickel is inserted into the coin slot. • Dis asserted for 1 clock period when a dime is inserted into the coin slot. • Machine asserts Open for one clock period when 15¢ (or more) has been deposited since the last reset. This does not completely define the behavior of the FSM. For example, what happens if a penny is inserted into the coin slot, or what happens after the gum is delivered to the customer? Let's assume that: • Coin sensor returns coins it does not recognize. • External logic resets the machine after the gum is delivered.
Objective Design a gumball machine control logic, including the finite state machine and circuit design. Problem Statement The gumball machine delivers a piece of gum after receiving 15¢ in coins. The machine has a single coin slot that accepts nickels and dimes, one coin at a time. A mechanical sensor indicates to the control whether a dime or a nickel has been inserted into the coin slot. The input N is asserted when a nickel is inserted into the coin slot. D is asserted when a dime is deposited. The machine asserts OPEN for one clock period when 15¢ or more has been deposited since the last reset. Then the controller's output causes a single piece of gum to be released down a chute to the customer. The machine does not give change. A customer who pays with two dimes get a piece of gum, but overpays 5¢. Coin Gum Gum release sensor dispenser mechanism FSM Reset CLK • Nis asserted for 1 clock period when a nickel is inserted into the coin slot. • Dis asserted for 1 clock period when a dime is inserted into the coin slot. • Machine asserts Open for one clock period when 15¢ (or more) has been deposited since the last reset. This does not completely define the behavior of the FSM. For example, what happens if a penny is inserted into the coin slot, or what happens after the gum is delivered to the customer? Let's assume that: • Coin sensor returns coins it does not recognize. • External logic resets the machine after the gum is delivered.
Chapter22: Sequence Control
Section: Chapter Questions
Problem 6SQ: Draw a symbol for a solid-state logic element AND.
Related questions
Concept explainers
Synchronous Generator
In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.
Salient Pole Rotor
Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.
Question
mechatronics home work
Transcribed Image Text:Objective
Design a gumball machine control logic, including the finite state machine and circuit
design.
Problem Statement
The gumball machine delivers a piece of gum after receiving 15¢ in coins. The machine
has a single coin slot that accepts nickels and dimes, one coin at a time. A mechanical
sensor indicates to the control whether a dime or a nickel has been inserted into the
coin slot. The input N is asserted when a nickel is inserted into the coin slot. Dis
asserted when a dime is deposited.
The machine asserts OPEN for one clock period when 15¢ or more has been deposited
since the last reset. Then the controller's output causes a single piece of gum to be
released down a chute to the customer.
The machine does not give change. A customer who pays with two dimes get a piece of
gum, but overpays 5¢.
Coin
N
Gum
Gum release
sensor
dispenser
mechanism
FSM
Reset
CLK
• Nis asserted for 1 clock period when a nickel is inserted into the coin slot.
• Dis asserted for 1 clock period when a dime is inserted into the coin slot.
• Machine asserts Open for one clock period when 15¢ (or more) has been
deposited since the last reset.
This does not completely define the behavior of the FSM. For example, what
happens if a penny is inserted into the coin slot, or what happens after the gum is
delivered to the customer? Let's assume that:
Coin sensor returns coins it does not recognize.
• External logic resets the machine after the gum is delivered.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 5 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you