Emergency Response Radio Ashok Basawapatna Joe Friedrichsen Chris Lasek Jeff Ritter

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

Functionality - Appearance 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

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

Radio Block Radio Antenna Demodulator Power Radio Signal Power Radio Signal Tuner

Radio Block Radio Receiver: Schematic

Radio Block RF Filter: Schematic

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!

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

Control Block LM567 Tone Decoder: Schematic

Control Block Notch Filter: Schematic

Control Block Control Logic: State Flow diagram OFF 0010 ON EMI 1011 EM

Control Block Control Logic: Schematic

Control Block Control Logic: Timing Diagram

Amplifier Block Amplifier Radio Signal Out to speakers Power

Parts

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

Schedule

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

Questions