Voice-Activated Television Remote Control (VAR) Senior Design I Mid-Semester Presentation [1]

VAR Team Members Team Leader Electrical Engineer Design Hardware PIC programming Computer Engineer Website Voice Recognition Coding PIC programming Computer Engineer Website Voice Recognition Coding PIC programming Adviser: Dr. Pan Li Electrical Engineer Hardware Research PIC Programming Debugging Melissa Webb David Trosclair Bobby Britton Bader Yaseen

Outline Problem Solution Constraints Technical Practical Approach Progress Timeline Questions

Problem and Solution

Problem Some people do not have the ability to operate a standard hand-held television remote control. Our market is the elderly and/or disabled. “During the 20 th century, the number of people in the United States aged 65 or over increased by a factor of 11, growing from 3 million to 33 million” [2, 3].

Solution The VAR will allow users to operate their television by using voice commands. By speaking into a microphone, the user is able to control 6 functions of the television: - Power On- Power Off - Volume Up- Volume Down - Channel Up- Channel Down

What is the VAR? The user will speak the commands into a microphone attached to a computer with our voice recognition software. The software will translate and wirelessly send the signal to the VAR. A microprocessor will convert from the wireless input to an IR signal and output to the television. VAR

Technical and Practical Constraints

Technical Constraints NameDescription Power Supply The VAR must operate from a standard 120V wall outlet. Response Time Target time for complete process is less than two seconds. Transmission Distance The wireless signal and the IR signal’s maximum distances are 15 feet. Voice CommandsThe VAR will recognize six vocal commands. IR Accuracy The IR signal must be transmitted and received accurately 98% of the time.

System Overview

Practical Constraints Manufacturability: Product Size The VAR will be no larger than 8’’ x 8’’ x 3’’. Convenient for user Easily fits into any space Portable Comparable to devices such as modems and routers

Practical Constraints Manufacturability: Operating System The VAR software will be Windows OS compatible. Microsoft Windows is one of the most commonly used operating systems for personal computers [4]. Executable files of the program can easily be made.

Approach

Voice Recognition Software Microsoft Speech API (C#) Supported by Microsoft OS Free Library Easy to use

Wireless Technology What is important to the design: Supported by Microsoft OS Convenience Point to Point Connection

Wireless Technology Name Range (ft) Bandwidth (Mbps) Convenience Point to Point Choice IEEE [5] NoYes Bluetooth [6] 3281Yes Wi-Fi30054YesNo

Wireless Technology NameRange (ft) Bandwidth (Mbps) ConvenienceChoice IEEE [5] No Bluetooth [6]3281Yes Wi-Fi30054Yes Name Range (ft) Bandwidth (Mbps) Convenience Point to Point Choice IEEE [5] NoYes Bluetooth [6] 3281Yes Wi-Fi30054YesNo

Bluetooth Module Name Range (ft) Operating Voltage (V) Price ($)Choice BlueSMiRF Gold [7] – Roving Networks (RN-41) [8] BlueSMiRF Silver [9]603.3 –

Name Range (ft) Operating Voltage (V) Price ($)Choice BlueSMiRF Gold [7] – Roving Networks (RN-41) [8] BlueSMiRF Silver [9]603.3 – Bluetooth Module

Need serial interface & general purpose I/O pins PIC24HJ32GP202 [10] Low Cost Team Experience Supports Library Microprocessor [11]

IR Transmitter High-Output Infrared LED [12] [13]

Progress and Timeline

Progress: Voice Recognition “Listen”

Progress: Voice Recognition “Volume Down”

Progress: Voice Recognition Voice commands implemented

Progress: IR Receiver

38KHz Infrared Receiver Module

Progress: IR Receiver 4.7 K ohms Resistor

Progress: IR Receiver LED

Progress: IR Receiver

Command 1 st code2 nd code Power on Power off Volume up Volume down Channel up Channel down Space-Width encoding

Progress: IR Receiver Command 1 st code2 nd code Power on Power off Volume up Volume down Channel up Channel down Space-Width encoding

Progress: IR Transmitter High-Output IR LED

Progress: IR Transmitter Resistors

Progress: IR Transmitter NPN Transistor

Progress: IR Transmitter

Progress: Breadboard On/Off Switch

Progress: Breadboard 3.3V Voltage Regulator

Progress: Breadboard Status LEDs

Progress: Breadboard BlueSMiRF Silver Bluetooth Receiver

Progress: Breadboard PIC24HJ32GP202

Progress: Breadboard IR Transmitter

JanuaryFebruaryMarchApril Research Design Parts Coding Troubleshooting & Debugging Working Prototype Timeline

References [1] (2012, February 18). “Elderly Couple Watching TV,” in fotosearch. [Online]. Available: [2] F. Hobbs. (2012, January 21). “The Elderly Population,” in U.S. Census Bureau. [Online]. Available: [3] (2012, January 21). “Sixty-Five Plus in the United States,” in U.S. Census Bureau. [Online]. Available: [4] (2012, February 18). “Operating System,” in StatCounter Global Stats. [Online]. Available: [5] (2012, February 18). “Home Networking with Zigbee,” in EE Times. [Online]. Available: [6] (2012, February 18). “Bluetooth Range,” in BluetoothRange. [Online]. Available: [7] (2012, February 18 ). “Bluetooth Modem- BlueSMiRF Gold” in Sparkfun Electronics. [Online]. Available: [8] (2012, February 18). “Bluetooth Module Breakout-Roving Network,” in Sparkfun Electronics. [Online]. Available: [9] (2012, February 18). “Bluetooth Modem- BlueSMiRF Silver,” in Sparkfun Electronics. [Online]. Available: [10 ] (2012, February 20). “PIC24,” in Microchip. [Online]. Available: [11] (2012, February 20). “PIC24,” in Ictradent. [Online]. Available: [12] (2012, February 25). “IR LED,” in Radio Shack. [Online]. Available: [13] (2012, February 25). “Transistor LED Drive Circuit,” in TX-IR Infrared Transmitter. [Online]. Available:

Voice-Activated Television Remote Control (VAR) Senior Design I Mid-Semester Presentation Questions?