1. Text Message DJ – Reliability & Safety Team 22 Garrett Strzelecki The Text Message DJ allows party guests the opportunity to choose which songs they want to hear. Guests can text the name of the sing they want and the Text message DJ streams the song from the internet. Other features include a voting process, strobing lights, and customizable options.

2. Component Failure Analysis  Linear Voltage Regulators – SPX29302  Voltage regulators are prone to failing if not designed properly against the given voltage and the voltage it must supply  Microcontroller – ATxmega64A3U  Brain of the device that may utilizes most every UART/I2C port simultaneously.  TVS Array – SMF05C  Used between with the GSM to provide transient voltage protection to the SIM card and back. Spiked of up to 2 amps.

3. Criticality Levels  High - The device causes harm or injury to the user  Medium – Device ceases to function in its most desired operation mode. It no longer plays the songs requested.  Low – The device loses an included function, but still can play songs that are requested.  DMX, light strobe, R/W to SD card no longer work

4. Voltage Regulator – SPX29302 SymbolParameterValueDescription λbλb Base Failure Rate0.002Voltage Regulator ΠTΠT Temperature Factor5.1 125 C (Max) ΠSΠS Electrical Stress1.0Voltage Reg constant ΠCΠC Contact Construction1.0Metalurgically bonded ΠQΠQ Quality Factor8.0Plastic ΠEΠE Environment Factor1.0G B Ground, base λPλP 0.0816 /10 6 HoursFailure Rate Voltage Regulator Devices λ P = λ b Π T Π S Π C Π Q Π E

5. Microcontroller – ATxmega64A3U SymbolParameterValueDescription C1C1 Die Complexity0.148 bit πTπT Temperature Coef.0.9585C (Max) C2C2 Pin Number Constant.03264 pins πEπE Environmental Constant0.5Ground base πQπQ Quality Factor10Commercial screening πLπL Learning Factor1.51 year in production (conservative) λPλP 2.235 /10 6 HoursFailure Rate MOS Devices Digital/Linear Gate/Logic Array λ P = (C 1 π T + C 2 π E ) π Q π L

6. Transient Voltage Suppressor – SMF05C SymbolParameterValueDescription λbλb Base Failure Rate0.0013TVS ΠTΠT Temperature Factor14 125 C (Max) ΠSΠS Electrical Stress1.0TVS constant ΠCΠC Contact Construction1.0Metalurgically bonded ΠQΠQ Quality Factor8.0Plastic ΠEΠE Environment Factor1.0G B Ground, base λPλP 0.1456 /10 6 HoursFailure Rate Transient Suppressor Devices λ P = λ b Π T Π S Π C Π Q Π E

7. FCMEC Chart Failure No. Failure ModePossible CauseFailure EffectsCriticalityProbability ( λ /Hour) 1 Failure of Voltage Regulator Chip burn out. Temperature too high with no heat sinks. Incorrect, unregulated voltage into the device and components. Medium0.0816 /10 6 2 Failure of Microcontroller Physical connection, incorrect software translation Logic levels unpredictable Medium2.235 /10 6 3 Failure of Transient Voltage Supressor High current draws from GSM SIM card unprotected. May result in no longer sending or receiving texts Medium0.1456 /10 6