1. Portable Battleship Display
ECE 445 Spring 2017
Portable Battleship Display
Group #80: Elizabeth Roels, Jonathan Rakushin, Colin Lu

2. Introduction
Battleship is best known as a tabletop game where players represent a fleet of ships with pegs and take turns declaring coordinates in order to destroy the opponent’s fleet.
We decided to create a modern twist on a classic game, Battleship that minimizes setup time and allows for more convenient gameplay.

3. Project Goals We had several goals in mind for the project
Portability - the game should be able to be taken outside or to other people’s houses
Engaging - the game should be fun to play by including relevant visual and audio effects.
Simplistic - the game should have simple controls-only switch and button inputs should affect gameplay

4. Features Li-Ion battery powered device
Integrated charging via MicroUSB
Button display
Sound
Bluetooth connectivity

5. Overview
Hardware
Power supply, microUSB connector, low pass filter speaker, Bluetooth chip
Button array, LED array
Software
Control game logic
Connect bluetooth chips together

6. Block Diagram

7. PCB Design

8. Charging Circuit With Speaker
The microUSB connector detached
Cables to connect in bottom left

9. Internal Power Lithium Ion battery @ 3.7V
Connects to a charging module to charge via 5V 1A
5V boost converter and 3.3V regulator
Convert the battery voltage to 5V for the speaker
Regulate to 3.3V for logic and LEDs

10. Battery Charging Time

11. Microcontroller
We planned on using a AT32UC3L016-AUT micro in order to control the interfacing between the LED array and the button array.
The micro should detect the game state and output the appropriate audio as well as interface the bluetooth chips properly

12. Microcontroller Flowchart

13. Bluetooth Module Connect two devices to play player vs player
Uses external HC-05 chip connected to power supply

14. Bluetooth Flowchart

15. Sound NMOS transistor regulates PWM signal to create sound
Low pass filter to smooth audio

16. Sound Video

17. Low-Pass Filter Roll Off
Roll off graph of the low-pass sound filter

18. Button array
8x8 button inputs controls the players moves in Battleship
Shift Registers take in 3.3±0.3V
Latency for button presses < 0.5ms

19. Button Array Delay 1 KHz Square Wave Input
Delay between button presses was ~20 ms, less than our specified 50 ms constraint.

20. LED Array Shift registers help change the colors of LEDs on the board
8x8 LED array displays the game board

21. LED IV Characteristic

22. Microcontroller+Board Layout

23. Future Prospects Finish Bluetooth functionality
Design the case to hold the boards in a compact design
Fix 5V regulator
Microcontroller was unable to be programmed due to lacking a programmer
5V boost regulator did not work, although most of the circuit was fine running off the provided voltage