Never Wander Band MID-SEMESTER PRESENTATION SENIOR DESIGN II MARCH 3, 2015

Team Members Cody Smith Electrical Engineering Team Leader PCB CADD Charles Kirk Electrical Engineering CADD Code Architecture Ravinder Singh Electrical Engineering Website Design PCB William Davis Computer Engineering Code Architecture Website Design

Faculty Advisor Dr. Robert Reese Professor ECE Department

Outline 1.Problem 2.Solution 3.Constraint ◦ Technical ◦ Practical 4.Progress 5.Testing 6.Future Work 7.Questions/Comments

Problem Worry of child getting lost Other devices are not practical/affordable Buddy Tag Freedom Watch Approximately 800,000 children are reported missing every year in the US. [1] [2] [3]

Solution A wearable system that: Alerts a parent when their child has wandered outside the parent’s proximity Points the parent toward their child Gives the parent an approximate distance to the child Never Wander Band – Dual System (two bands)

High Level Overview

Constraints

Constraint Description Size Specifications Parent Band must not exceed dimensions of 2.5”x 2”x 0.8”(LxWxH). Child Band must not exceed dimensions of 2”x 1.5”x 0.6”(LxWxH). Device Range and Accuracy The Parent Band must be able to communicate with the Child Band at a minimum range of 100 meters, line of sight. It must also be accurate in tracking within 5 meters of child’s location. Technical Constraints

ConstraintDescription Battery LifeThe battery life of each device must be at least four hours. User Customizability User will set the safe range their child needs to be in. The user has the option of 20, 30, 40, and 50 meters. Display AbilityThe Parent Band must point in the direction of the Child Band and give the distance to the Child Band.

Practical Constraints TypeDescription Economic The device must be competitive The Never Wander Band System must cost less than $150 for the customer. Competitor’s, Buddy tag and Freedom Watch, cost range from $40 to $600.

Practical Constraints TypeDescription Manufacturability Product must be wearable and comfortable for both users User friendly interface Fashioned in the way of a wristwatch and wristband Discrete, lightweight, and modern

Progress

New Code Architecture ● No longer waits for packets of the UART, only try to load a new packet when one is ready ● Implemented more error conditions checks and error displays ● Added software timers for packet timeouts

Parent Band Schematic

Transceiver Charging Circuit Microcontroller Screen GPS Buzzer and Vibrator Buttons Switch

Child Band Schematic

GPS TransceiverCharging Circuit

Testing

PCB Testing Wiring Check Transceiver Distance Test – 100 meters Battery Life Test - 4 hours Water Resistant Test – Light misting

Future Work Order PCB and needed parts Populate and test PCB Create CADD design for packaging 3D print packaging and assemble Test final packaged product

References [1] Staff, Abc News. "Missing Children in America: Unsolved Cases." ABC News. ABC News Network, n.d. Web. 02 Sept Available: cases/story?id= cases/story?id= [2] "BuddyTag + Silicone Watch." LE VISE PRODUCTS LLC, n.d. Web. 16 Nov [3] "Lok8U." Lok8U. N.p., n.d. Web. 16 Nov

Never Wander Band MID-SEMESTER PRESENTATION SENIOR DESIGN II MARCH 3, 2015