1. Emergency Response Radio Ashok Basawapatna Joe Friedrichsen Chris Lasek Jeff Ritter

2. Purpose A radio that alerts users to emergency broadcasts A radio that alerts users to emergency broadcasts –Constantly monitors specified station –Broadcasts emergency message when the Emergency Alert System is activated –Otherwise behaves as normal radio

3. Functionality - Appearance 1 2 3 4 5 7 8 10 1. Emergency Radio Tuner Indicator 6. Power Button 2. Emergency Radio Band Selector 7. Volume Knob 3. Emergency Radio Tuner Knob 8. Standard Radio Tuner Knob 4. Emergency Radio Manual Override Button 9. Standard Radio Band Selector 5. Manual Override Light 10. Standard Radio Tuner Indicator 6 9

4. Block Diagram Standard Radio Emergency Radio Control Amplifier Power Conditioning Power Radio Signal User Input Out to Speakers Radio Signal

5. Radio Block Radio Antenna Demodulator Power Radio Signal Power Radio Signal Tuner

6. Radio Block Radio Receiver: Schematic

7. Radio Block RF Filter: Schematic

8. Control Block Control Power ERR Radio Signal Standard Radio Signal User Input Power to ERR Power to Standard Chosen Radio Signal Power to Amplifier Logic Tone Recognition ERR Radio Signal Standard Radio Signal Power User Input EAS Tone Matched? Power to ERR Power to Standard Radio Power to Amplifier Digital Switches Power ERR Radio Signal Chosen Radio Signal On/Off/ Override Emergency!

9. Control Block Notch: 905HzBand Pass: 853Hz Band Pass: 960Hz K2K2 Comparator IntegratorComparator Emergency! v in Voltage Follower 74HCT11 Voltage Follower Comparator K1K1 K3K3 Tone Recognition: Block Diagram

10. Control Block LM567 Tone Decoder: Schematic

11. Control Block Notch Filter: Schematic

12. Control Block Control Logic: State Flow diagram OFF 0010 ON 1110 111 110 100 011 010 000 111 110 100 011 010 000 101 011 010 001 101 011 010 001 110 111 EMI 1011 EM 1011 001 000 100 101 000 001 100 101 111 110

13. Control Block Control Logic: Schematic

14. Control Block Control Logic: Timing Diagram

15. Amplifier Block Amplifier Radio Signal Out to speakers Power

16. Parts

17. Division of Labor Isolation Circuit & Demodulator Isolation Circuit & Demodulator –Jeff Control block Control block –Ashok: tone recognition –Joe: control logic Amplifier Block Amplifier Block –Chris Documentation Documentation –Entire group

18. Schedule

19. Deliverables Milestone 1 Milestone 1 –Amplifier block built and tested –Radio block built and testing Milestone 2 Milestone 2 –Control block built and tested Final Expo Final Expo –Integration of all blocks

20. Questions