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Preliminary Design Review Team 24 Remote Chessboard October 20, 2017 Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 1 Team Introduction Battsooj Bayarsaikhan

Shashwat Patel David Nguyen Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 2 Content 1. Problem Statement 2. System Specifications 3. Design Alternatives 4. Block Diagram 5. Budget

Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 3 Problem Statement Digitization of Entertainment interconnected convenient less holistic experience Chess.com 18 million+ members Goal To create a chessboard that

allows users to play remotely while providing a more intimate experience Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 4 System Requirement An ideal system/solution must possess the following characteristics: 1. 2. 3. 4. 5.

6. 7. Detect every move/changes on the board accurately Identify different types of pieces Verify eligibility of recorded move Indicate illegal moves Fast response time (<2s) Standard sized (5cm-6cm squares) (3.75in king height) Reflect opponents move clearly Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 5

Design Alternatives 1 Chesstronic Smart Chess Board (Kickstarter) This project was launched on July 21, 2017, and was cancelled due to underfunding. Similar User Interface (moves are indicated with LEDs) Lacks in Detecting Individual Pieces (No RFID readers) 1. Assumes every piece is placed in the right locations in the beginning of games. 2. Requires to use the app frequently during game for the special moves (Castling, Pawn Promotion, En Passant). Therefore defeats the purpose of the project which is physical intimate experience. https://www.kickstarter.com/projects/14758633/chesstronic-smart-chess-board/description Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 6

Design Alternatives 2 Square-Off (Kickstarter) This project was launched on Nov 5, 2016 and funded. Completely Different User Interface (with self moving parts and no LEDs) Lacks in Detecting Individual Pieces (No RFID readers) 1. Assumes every piece is placed in the right locations in the beginning of games. 2. Requires to use the app frequently during game for the special moves (Castling, Pawn Promotion, En Passant). Therefore defeats the purpose of the project which is physical intimate experience. 3. Uses pressure sensors to detect the movements (players have to press hard on the board 4. Uses smaller pieces than standardized size to make the movements https://www.kickstarter.com/projects/infivention/square-off-worlds-smartest-chess-board-relaunched Department of Electrical and Computer

Engineering Advisor: Professor McLaughlin 7 Our Design Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 8 RFID Sensing System ARPT System Passive Tags

LF/HF Lowest radio interference Short read distance Read Only Active Reader Mifare RC522 MFRC-522 ~$2 Bus Such as SPI Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 9

Communication Protocol Communication between Phones will occur through WiFi Communication between Chessboard and Phone will occur through bluetooth using an SPP Profile for sending short bursts of data RN4870- 4.2 BLE Module Shielded $8 Provides maximum range of 1m Low Energy Module ASCII Interface Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 10

Choosing a Microcontroller ATMega32 provides USART to interface with Bluetooth SPI terminal for RFID Reader Serial Buses Low Power Consumption Low Throughput and Computational Power ARM LPC1769FBD100 512 kB of flash memory, 64 kB of data memory, Ethernet MAC, USB Device/Host/OTG, 4 UARTs, 3 SSP/SPI, 3 I2C, I2S motor control PWM 2 times more functionality than ATMega32 and will provide room for project to continue to grow Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 11

LEDs LED edge-lit acrylic lighting - Surface friction can be modified - Custom sized - Easier for the RFID scanners to read through - Attached to metal frame to create the supporting board surface. Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 12 Android Application/ Microcontroller illegalMoveDetection()

Engine to assess legality of moves before sending to opponents android application. ledController() Controls LED using MUX to select which LED to light in each row. Will help in reducing the number of traces on PCB gameLogic() checkmates, draw conditions, three-fold repetitions, and castling problems chessBoardUI() Design simple to use UI to display moves Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 13

Budget Microcontroller: $2-$12 RFID Tags: $15 RFID Readers: $2(x64) PCB: ~$30 LED: <$2(x64) Raw Materials: $10 BT Module:

Total: $8 ~$350 Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 14 MDR Deliverable Detection of piece movement within a 3x3 grid and transmitting information to a mobile phone. Assembly of LED and Sensor Array(David, Battsooj) Software Skeleton and Microcontroller(Shashwat) Demonstrates:

Accurate detection of unique piece ID Detecting the removal and placing of pieces within a 3x3 grid Relaying information to Android Application Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 15 Questions Department of Electrical and Computer Engineering Advisor: Professor McLaughlin

16 Q&A Would people actually buy it? Ans: YES! Square-Off chess was funded in only 3 weeks, and being sold by 250$ per board on indiegogo.com. Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 17 Q&A Chess equipment standard? US Chess Federation has established Tournament

Sizing Standard. The 75% Guideline. Department of Electrical and Computer Engineering Advisor: Professor McLaughlin 18

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