Preliminary%20Design%20Review%20(PDR)

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Preliminary Design Review (PDR)

• Team Amaze Me

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Team Amaze Me

• EE 296 Project (MicroMouse)
• Members
• Brandon Gibu
• Ah Ram Kim
• John-Kalani Miyajima
• Justin Ogata
• Website
• http//www2.hawaii.edu/bgibu

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Brief Overview of Project

• Micromouse
• Autonomous robot
• Find center of a 16 x 16 maze
• Uses sensors to turn at corners
• Uses tracking program to keep track of location
  in maze
• Continues to search until it finds the fastest
  path to center

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Brief Overview (continued)

• Approaches
• Use tutorials to help construct hardware to build
  mouse
• Create wall hugger program to randomly maneuver
  through maze
• Create tracking software to find fastest route to
  center

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Block Diagram of the Mouse
Sub-components are inter-related with each other
in some way
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The Chassis of the Mouse in detail

• Base frame (bottom plate)
• The Third Wheel
• Position of the protoboards, sensors, and other
  circuit elements
• Miscellaneous

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Base Frame

• Oval design
• Fold up motor mounts
• Keep the wheels
• closer together
• Small body frame

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The Third Wheel

• It is used to balance the overall weight of the
  mouse
• Experimented with
• roller caster
• Problem Possibility of
• dragging the mouse
• Looking for a new 3rd
• wheel

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The Position of Circuit Elements

• Stack the protoboards on top of each other
• Stack in a easy access manner
• Team decided to use a top down layout b/c of
  experiment
• The infrared sensors (QRD1114) are weak
• A signal roughly occurs within half an inch
  distanc, based on tests
• Battery packs placed in vertical fashion near
  stepper motor

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Miscellaneous

• Try to make it look like a mouse
• Either a circuit board in the shape of a mouse or
  have a figure of a mouse on top
• Have adjustable arms that connect to areas of the
  sensors
• No two mazes are exactly the same
• Find ways to protect the sensors
• Ex. With a side sensor layout, use stand offs as
  bumpers to prevent damage

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Prototype of Mouse
Front View
Side View
Top View
Top View
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Future Tasks

• Become highly familiar with the behavior of the
  sensors and rabbit
• At the same time, continue making changes on the
  chassis of the mouse
• Create the Algorithm
• Coding, coding, coding

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Potential Problems

• Balance of mouse (extra wheels ???)
• Connecting the right ports to desired input or
  output
• Supplying enough power to mouse
• Keeping mouse within rules of competition
• Brains of the mouse
• Time constrains

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Other Module Analysis-The Circuit(Stepper Motor
Problem)

• Voltage drop across stepper motor circuit
• Axle rotated only in one direction and stopped
  when sensor sensed movement
• Voltage supply showed voltage dropping by half
• LED probe on sensor circuit
• Not enough resistance resulting in LED being very
  bright and decrease in voltage

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Decisions to be Made

• Third wheel(s) low friction pad or canster ball
• Number of sensors to be used
• Exact locations of sensors
• Design mouse into a mouse
• Amount of batteries we need to supply mouse

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Schedule and Time LineGantt Chart
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Thank You

• Questions or comments?