2. Scott Frazier-CpE Ryan Rivas-EE Louis Mason-CpE Steffen Sutton-EE,CpE
Group 33
Scott Frazier-CpE Ryan Rivas-EE
Louis Mason-CpE Steffen Sutton-EE,CpE

3. What is CyberChess?
CyberChess is an autonomous, speech- controlled chess board designed to allow two players to enjoy an aesthetically appealing game of chess entirely through spoken commands.

4. Motivations Interactive Experience PCB Design Speech Recognition
Enjoyment
Graduation

5. Goals Chess pieces appear to move by themselves Speech controlled
Chess game rules engine
Audio output system
LED Matrix
Chess clock

6. Requirements The game will... 1.
...provide game feedback via audio and lighting 2.
...allow any move to be completed autonomously 3.
...be able to set up the chess board automatically 4.
...display possible moves (via LEDs) if a user asks for them 5.
...display a visual countdown for modes with timers 6.
...have a specific startup sequence for lights and audio 7.
...have a specific shutdown sequence 8.
...have a flat see-through surface so LEDs can sit underneath the squares.

7. Specifications Complete any move in: 10 Seconds
Set up board from start in:
5 minutes
Save and load:
1 game
Weigh no more than:
25 lbs
Sounds audible from at least:
2 feet
No larger than:
4 x 3 feet
Automatically turn off after (prolonged inactivity)

8. How to Move Chess Pieces?
Individually motorized pieces controlled by RF signals (Requires 32 separate electromechanical systems)
Mechanical arm above board (Chess pieces do not appear to move on their own)
XY-plotter beneath the board, with magnet to grab chess pieces (Move execution time may be fairly slow, but cost and workload are reasonable)

9. Requirements for the XY-Plotter
|____________________________|
12 inches
2 stepper motors (left)
1 servo motor (right)
Linear motion kit (vex racks, sprockets, sliders)
- Wood and screws for structure
- Electronics/software to control motors

10. Additional Systems
LED Matrix - An 8x8 RGB LED array (one for each square) used for visual effects. Also, the LEDs will light up to indicate possible moves for any piece specified by the user.
Chess Timer - Players can use this optional feature to play timed chess games in a few different styles. Two 4-digit 7-segment displays (one for each player to see) will be used to show time.

11. i3 Mainframe
Will be used to interface with the final PCB via USB-to-Serial connection.
The CyberChess audio system will be directly controlled from the mainframe.
Speakers
Microphone
All custom software engines will run on the mainframe

12. General Hardware

13. Microcontroller MCU ATMega2560 ATMega1280 ATMega328 Flash (KBytes)
Pin Count
100 32
Max Operating Frequency (MHz) 16 20
MAX I/O Pins 86 23

14. Motors Stepper Motor ROB-10846 Pololu Adafruit Steps/Rev 400 200
Supply Voltage 3V
3.8V
12V
Servo Motor
ROB-09064
HS-81
Sec/60Deg
0.16
0.11
Supply Voltage 6V
4.8V

15. Motor Driver Stepper Motor Driver DRV8834 A4988 ROB-10267
Microstepping 32 16 8
Supply Voltage
3.3V 5V 8V
Price
Sampled
$9.95
$14.95

16. LED Matrix

17. LEDs Multiplexed LED Array (Darlington Array) 24 pins from MCU
MCU provides current through rows
LED driver sinks in current through columns and adjust color using BC

18. LED Driver LED Driver TLC5952 TLC5940 AS1112 # of Channels 24 16
Data transfer rate
35 MHz
30 MHz
Channel drive
35 mA
120 mA
100 mA
Supply Voltage
3 - 5 V V
Price
Sampled
$5.95
$1.49

19. Chess Clock Display

20. Chess Clock Multiplexing
The ATMega 2560 activates the transistors in order to allow current through certain digits.
The BCD to 7-segment decoder outputs the the connections corresponding to the given BCD numbers (0-F [hex]).
By turning on and off transistors, the four digits can be multiplexed such that each digit is active 1/4 of the time.

21. USB Controller ATMega16U2 FTDI Pins 44 28 Interfaces UART, SPI UART
EEPROM
512B
1024 bits

22. Microphone Minimum Frequency Response: 100 Hz
Maximum Frequency Response: 5 kHz
Microphone Sensitivity: -54 dB

23. PCB Schematic

24. Development Board Arduino Mega 2560 Arduino Uno Operating Voltage 5V
Digital I/O Pins 54 14
Analog Input Pins 16 6
Flash Memory (KB)
256 32
SRAM (KB) 8 2
EEPROM (KB) 4 1
Clock Speed (MHz)

25. Arduino Mega 2560

26. General Software

27. Development Tools Arduino IDE Basic error checking
Simple compilation and uploading
Text Editors
VIM
Notepad
Simple, clean, and straightforward

28. Board Representation Array of 8 rows
Each row represented by one 32-bit int
Each nybble corresponds to a spot
Board acted on with bit-twiddling:
value: (board[rank] >> (file << 2)) & 0xF
unset: board[rank] &= ~(0xF << (file << 2))
set: board[rank] |= (newValue << (file << 2))
All necessary interaction can be composed from these atomic functions

29. Chess Engine Move execution: Check detection:
Iterate through each spot on board
Attempt move from current spot to each King

30. Chess Engine Data Structures

31. BMSE (Board, Movement, Sound)
Maintain synchronous gameplay experience
Control motors, lights, and sounds
Execute movements along square edges
Potentially optimize to move diagonally through empty spaces
Utilize Arduino's simple pin API

32. BMSE (Board, Sound, Movement)
Sounds
startup.mp3, shutdown.mp3
newGame.mp3, gameOver.mp3
gameSaved.mp3
gameLoad{ing,ed}.mp3
pauseGamePrompt.mp3
endGamePrompt.mp3
resignPrompt.mp3

33. Speech Recognition
Audio waveforms split into utterances and paired with the closest match
Utterances
audio chunks between pauses

34. Speech Recognition Options
PocketSphinx
Android
Microsoft Speech API
Coding Language C
Java
Visual Basic/C#
Language Support
English
Chinese
French
Spanish
German
Russian
New languages always being added
Simplified Chinese
Japanese

35. How PocketSphinx Works
Acoustic Model
Acoustic properties of each senone
Specific to Language (English)
Language Model
Used to restrict word search
Created with CMUSphinx Toolkit
Phonetic Dictionary
Mapping from words to phones

36. Speech Recognition Engine
Makes use of PocketSphinx Library
Converts spoken commands into text
Parsed and sent to appropriate program

37. SRE Commands “[Piece Location] to [New Location]”
Action
“[Piece Location] to [New Location]”
Executes requested move.
“[Piece Location] possible moves”
Lights up possible moves.
“Pause Game”
Requests opponent's confirmation.
“End Game”
“New Game”
"Draw"
“Resign”
Requests current player's confirmation.

38. SRE Flow chart No
*Checked with Chess/BMSE Engine
Yes

39. Bootloader ARDUINO MEGA to be used AVR ISP (In- System Programmer)
Connected to AVR Using
SCK, MISO, MOSI, RESET, GND, VCC
Serial Clock
Master In Slave Out
Master Out Slave In

40. Power Supply Power Supply Voltage Range: Servo motor 4.8 - 6V
Stepper motor 3V
LED driver
3 to 5.5V
Motor driver
2.5 to 10.8V
ATmega2560
4.5 to 5.5V

41. Enclosure
4' x 3' x 1'
Hinged side for hardware access

42. Administrative Content
Current Purchases
QTY
Description
Part Number
Unit Price
Total Price 1
ATmega2560
ATMEGA CU
Sampled 2
Bipolar Stepper Motor
ROB-10846
$16.95
$33.90
Dual Bridge Stepper Driver
DRV8834
Servo Motor
ROB-09064
$12.95
24 channel LED driver
TLC5952
Gear Kit
$12.99 3
(2 pack) Linear Slides
$14.95
$44.85
(16 pack) Vex rack gear
$19.99
$39.98 74
RGB LED's
COM-10866
$0.86
$63.64
7 Segment LCD Display
FE0202
LCD Panel Driver
ICM7211AMIPLZ
$1.33
$2.66
Miscellaneous (Wood, screws, etc. )
$20.00
Money Spent to Date: $208.66

43. Administrative Content
Items Left 1
Enclosure
$150.00
Arduino Mega 2560
$59.99
PCB
$30.00
Remaining Cost: $239.99
Expected Total: $448.65

44. Workload PCB Chess Engine Enclosure BMSE SRE Movement System
LED Array/Chess Timer
Louis X
Ryan
Steffen
Scott

45. Administrative Content

46. Problems and Concerns ARM to ARDUINO Movement system fast enough?
Magnetic pulls and buffer space

47. Questions?