1. ECEN 4013 Project II Research Locking Mechanism & Power Supply

2. Power [70] 3.3V, 350 mA 5V, 230 mA 12V, 120 mA 24V, 25 mA Microcontroller Unit Check Combination Main Program Input/Output Set/Restart Timers Display MAGE Communication Blair Cameron Ben Jake Eric Rui Enclosure Design [25] Unlocking Mechanism (24V, 25mA) [30] Unlock (GPIO) Digital Specs (Unless Otherwise Specified) Vdd = 2V Vss = 0V [50] Xbee (3.3V, 50mA) [30] MAGE TX IR Emitters (5V, 50mA) [45] RF at 2.4GHz RX PWM Infrared at 56kHz λ= 950nm UART Visual Indication (5 or 12V, 120mA) Numerical Indicators [60] LED Display [40] 7 GPIO to 3 digit, 7- segment decoder Digital Input Lines Vdd = 5V Vss = 0V GPIO 30s Countdown Keys Correct Red, λ=619nm Green, λ=568nm Yellow, λ=588nm RFID Block (5V, 30mA) (1) RFID Key Reader [40] (4) RFID Keys [10] Digital Input Lines Vdd = 5V Vss = 0V 32 bit Identifier Functional Block Diagram v 2.3 Audio Indication (5V, 150mA) Driver / Storage [50] Correct Combo Wrong Combo Out of Time IR Attack Programming [50] 8 GPIO Digital Input Lines Vdd = 2V Vss = 0V Microphone or unamplified line from audio source

3. Table of Power Requirements Power Requirements 3.3V:5V:12V24V X-Bee50 mARFID30 mAVisual120 mALock25 mA PIC300 mAIR Emitter50 mA Audio150 mA Total350 mATotal230 mATotal120 mATotal25 mA Total Current Used:725 mA

4. Level 2 Block Diagram - Power

5. Level 2 Alt. Block Diagram - Power

6. Alt. Power Block Explained Larger Battery: Several aspects of this battery were very nice; it had a large capacity, large output current, and AC charging. I ultimately decided, though, that the change in cost ~$50 wasn’t worth the unneeded difference. Voltage Dividers: Using resistive voltage dividers to step down the voltage (5 to 3.3 and 27 to 24 & 12) dissipated power unnecessarily, even though it would have been simpler. Regulators do a better job of stepping down voltage. Using the step-up booster allowed us to run everything off of the single 5V supply, eliminating the need to use the 9V batteries. This also simplifies recharging and maintenance.

7. Level 2 Block Diagram - Lock

8. Level 2 Alt. Lock Block Diagram

9. Alt. Lock Block Explained I could have used a 1.5-3.0 V hobby motor instead of the maglock. The benefit would have been the lower voltage requirement, but I would have had to construct a locking mechanism from scratch for the gear on the motor to control. The code for implementing the motor-controlled lock would also have been far more complicated than simply turning a transistor on and off.

10. Lock Simulation On

11. Lock Simulation Off

12. Parts List Part:Part #:Quantity: Voltage Step-up (12 & 24 V) 10 uH InductorLQH31CN100K03L2 45kOhm ResistorCMF6045K000BEBF1 1M Ohm ResistorMF1/4DCT52R1004F2 Schottky DiodeZHCS500TA2 4.7 uFREA4R7M1EBK-0511P4 91k Ohm ResistorMF1/4DC9102F1 Voltage BoosterZXLD1615ET5TA2 Power Regulation (3.3 & 5 V) 3.3V Regulator LD1117S33TR 2 5V Regulator S-1165B50MC-N7J-TF 3 Locking Mechanism Lock http://www.amazon.com/Skylink-MC-201- Electro-Magnetic- Lock/dp/B000KL2M64/ref=sr_1_4?ie=UTF8&qi d=1330628782&sr=8-41 Transistor 2PA1774Q,115 1 1k Resistors RN732BTTD1001F25 2 Power Supply 5.3V Battery Pack http://www.amazon.com/PowerGen-External- Blackberry-Sensation- Thunderbolt/dp/B005VBNYDS/ref=sr_1_1?ie= UTF8&qid=1330633433&sr=8-11