1. Design Review S13-44-GLCK 4/18/2013

2. Who We Are Baker Alotaibi Mechanical Engineer Fahad Alotaibi Electrical Engineer Devin Scarborough Mechanical Engineer Richard Posada Computer Engineer Travis Arnold Electrical Engineer

3. Design Overview Locking Mechanism Lock Case Material Power Subsystem Microcontroller Subsystem Software Subsystem

4. Locking Mechanism Rack and Pinion mechanism Handles much travel depending on setup Simple to manufacture Key Failsafe and Mechanism Relation

5. Locking Mechanism Key and Matching Lock Cylinder Typical Key Pros and Cons Barrel or Tube Key and Cylinder

6. Locking Mechanism Solenoids Ideal use for simple lock operation Solenoid Force versus Plunger Extension

7. Lock Case Material Stainless Steel: Advantages: hard material does not corrode. Disadvantages: High cost, hard to fabricate. Brass: Advantages: high-class look, corrosive resistance, easily machined, cheaper. Disadvantages: Weak, easily damaged, non- weather resistant Steel: Advantages: Very strong, easy construction. Disadvantages: heavy, corrosion, action of rust.

8. Power Subsystem Power subsystem: Batteries Will be used as a power source Will supply power to the microcontroller Microcontroller will provide power to the solenoid and the Bluetooth receiver Microcontroller supports AAA batteries at 1.5v, and a coin battery “cr2032” 3v

9. Microcontroller Subsystem Microcontroller subsystem Rfduino will be the microcontroller used for this design Is Arduino compatible and uses the same Arduino code Has low power mode and can run for a long duration of time using only a 3V CR2032 coin battery Built in wireless communication. i.e. Bluetooth 4.0. Small in size and low cost Easy to program with the USB shield Function Obtains input from phone application Uses the output mechanisms of the microcontroller to control the solenoids Will need an N-Channel Mosfet (TIP 102 works fine) as a relay that will provide and switch the power for the 12 V solenoids

10. Software Subsystem Phone Application Coded in Eclipse Java based application Free Software Microcontroller Application Coded using Arduino Software Using Arduino based libraries Free software

11. References 1.N/a. Stepper Motors. 2011. February 2013. 2.Society of Robots. ACTUATORS - SOLENOIDS. 2013. February 2013. 3.Bob Simon. Plant Services. 2013. February 2013. 4.Open Source RF, Kickstarter, [online] 2013. http://www.kickstarter.com/projects/1608192864/rfduino-iphone-bluetooth-40- arduino-compatible-boa (accessed: 14 April 2013). 5.Mohammad Hamdar. IPhone and Android are Taking over. May 28,2012. February 2013. 6.David Cogen. Android Application Development 101: Getting Setup. January 2011. February 2013.

12. Questions ?