Voice-Activated Television Remote Control (VAR) Senior Design II Final Presentation [1]

VAR Team Members Team Leader Electrical Engineer Hardware PCB Design PCB Components Packaging Computer Engineer Website PIC programming Voice Recognition testing Computer Engineer Website GUI Creator PIC programming Voice Recognition Testing Adviser: Dr. Pan Li Electrical Engineer Hardware PCB Design PCB Components Packaging Melissa Webb David Trosclair Bobby Britton Bader Yaseen

Outline Problem Solution Constraints Technical Practical Hardware - PCB Testing Software - GUI Testing Testing - Technical Constraints 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 key functions of the television: - Power- Mute - 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

System Overview

Technical and Practical Constraints

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

Practical Constraints NameDescription Product SizeThe VAR will be no larger than 8” x 4.5” x 3”. Operating SystemThe VAR will be Windows OS compatible.

Practical Constraints Manufacturability: Product Size The VAR will be no larger than 8’’ x 4.5’’ 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.

Hardware Updates

PCB Schematic

PCB Layout Front Back

PCB Layout Front Back

PCB Layout Front Back

PCB Layout Front Back Power Jack

PCB Layout Front Back Power Switch

PCB Layout Voltage Regulator

PCB Layout PIC24

PCB Layout Bluetooth Receiver

PCB Layout Front Back IR LEDs

Enclosure

Final design for the VAR Power supply Power switch Power connector

Software

Reminisce: Previous Voice Recognition Software

Current Voice Recognition Software

Alteration of Keyword Previous Keyword: “Listen”Current Keyword: “Attention”

VAR GUI Operations COM Port Menu ItemCOM Port Selection

Channel Customization Customize up to 7 channels Add Channels Delete Channels Error Detection strictly enforced when attempting to authorize a new channel Channel authorization success grants local integration of that channel to VAR’s customized dictionary

Add / Delete Channel Menu Items Add Channel Menu ItemDelete Channel Menu Item

Add Channel Operation Add Custom 1 Slot after Add Channel Operation Delete Custom 1 Slot after Add Channel Operation

Delete Channel Operation

Error Detection: Inadequate Information

Error Detection: Channel Name Already Assigned

Error Detection: Channel Number Already Assigned

Error Detection: Invalid Channel Name

Error Detection: Invalid Channel Number

Channel Customization Integration to VAR GUI

Testing: Technical Constraints

Testing: Bluetooth

Testing: IR Transmitter Accuracy CommandAccuracy (%) 15 ft. Straight Ahead 15 ft. 15° to right 15 ft. 15° to left Obstructed View Power100 0 Volume Up100 0 Volume Down100 0 Channel Up100 0 Channel Down100 0 Mute100 0

Testing: Voice Recognition Software

UserPercent Error for each User (%) Power Volume Up Volume Down Channel Up Channel Down Mute Bader Bobby David Melissa

Testing: Latency CommandTime (s) Power0.40 Volume Up0.30 Volume Down0.60 Channel Up0.70 Channel Down0.50 Mute0.45

Testing: Sunny Day Case User enters correct COM port VAR is connected User says key word “Attention” Command is recognized User says command “Power” Television responds by turning on or off

Testing: Sunny Day Case

User enters the correct COM port. Software informs user that the COM port is closed i.e. VAR is off VAR still tries to connect. Once the connection is made, the VAR is connected and normal operation continues. Testing: Rainy Day Case- Bluetooth not Connected

Testing: Rainy Day Case- Unrecognized Command User enters the correct COM port VAR is connected User says key word “Attention” Command is recognized User says command “Power” Command is not recognized User prompted to repeat command

Testing: Rainy Day Case- Unrecognized Command

Working Finished Design

VAR System Setup

Part’s Cost PartDescriptionQuantityCost per unitTotal Cost Enclosure Blue plastic enclosure- 7.62x4.47x2.47"1$9.35 PCB 1$33.00 BT-BluetoothBlueSMiRF Silver Bluetooth Modem1$39.95 Wall Transformer6 V, 1 A1$8.06 Power Connector 1$0.92 PICKit Header Pin6 pins1$1.13 PICPIC24HJ64GP5021$6.08 D1 & D2-IR LEDHigh-Output Infrared LED2$2.19$4.38 IC1-Voltage RegSurface Mount 3.3 V voltage regulator1$1.91 S1-SwitchRight angle side slide switch1$1.80 F1-Fuse3A,125V1$0.65 C147 uF1$0.19 R1 & R22.2 k2$0.08$0.16 C2 & C30.1 uF2$1.06$2.12 R310 k1$0.08 R4201$0.08 C410 uF1$0.81 T12N39041$0.18 TOTAL$110.85

Part’s Cost PartDescriptionQuantityCost per unitTotal Cost Enclosure Blue plastic enclosure- 7.62x4.47x2.47"1$9.35 PCB 1$33.00 BT-BluetoothBlueSMiRF Silver Bluetooth Modem1$39.95 Wall Transformer6 V, 1 A1$8.06 Power Connector 1$0.92 PICKit Header Pin6 pins1$1.13 PICPIC24HJ64GP5021$6.08 D1 & D2-IR LEDHigh-Output Infrared LED2$2.19$4.38 IC1-Voltage RegSurface Mount 3.3 V voltage regulator1$1.91 S1-SwitchRight angle side slide switch1$1.80 F1-Fuse3A,125V1$0.65 C147 uF1$0.19 R1 & R22.2 k2$0.08$0.16 C2 & C30.1 uF2$1.06$2.12 R310 k1$0.08 R4201$0.08 C410 uF1$0.81 T12N39041$0.18 TOTAL$110.85

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:

Voice-Activated Television Remote Control (VAR) Senior Design II End-Semester Presentation Questions?