Transcript Emergency Response Radio

Emergency Response Radio
Ashok Basawapatna
Joe Friedrichsen
Chris Lasek
Jeff Ritter
Purpose

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
1
2 3
10
98
1. Emergency Radio Tuner Indicator
2. Emergency Radio Band Selector
3. Emergency Radio Tuner Knob
4. Emergency Radio Manual Override Button
5. Manual Override Light
4
5
6
7
6. Power Button
7. Volume Knob
8. Standard Radio Tuner Knob
9. Standard Radio Band Selector
10. Standard Radio Tuner Indicator
Block Diagram
Standard
Radio
Emergency
Radio
Radio Signal
Power
Radio Signal
Power
Power
Control
Power Conditioning
Power
Radio Signal
Amplifier
Out to
Speakers
User Input
Radio Block
Power
Radio
Antenna
Radio
Signal
Demodulator
Tuner
Radio
Signal
Power
Radio Block
Radio Receiver: Schematic
Radio Block
RF Filter: Schematic
Control Block
Power
Power to ERR
Power to Standard
ERR Radio Signal
Control
Power to Amplifier
Standard Radio Signal
Chosen Radio Signal
User Input
Power
Tone
Recognition
ERR Radio Signal
EAS Tone Matched?
Power
Logic
User Input
On/Off/
Override
Emergency!
Power to ERR
Power
Standard Radio Signal
ERR Radio Signal
Digital
Switches
Power to Standard Radio
Power to Amplifier
Chosen Radio Signal
Control Block
Tone Recognition: Block Diagram
vin
Voltage
Follower
K1
Comparator
K2
Comparator
K3
Comparator
Band Pass: 853Hz
Voltage
Follower
Band Pass: 960Hz
Voltage
Follower
Notch: 905Hz
74HCT11
Emergency!
Integrator
Comparator
Control Block
LM567 Tone Decoder: Schematic
1
f0 
1.1R1C1
BW  1070
Vi
f 0C 2
Control Block
Notch Filter: Schematic
Control Block
Control Logic: State Flow diagram
011
010
000
011
010
000
111
110
100
OFF
0010
001
001
101
101
011
010
000
001
011
010
110
111
EMI
1011
001
000
100
101
111
110
100
ON
1110
111
110
EM
1011
100
101
Control Block
Control Logic: Schematic
Control Block
Control Logic: Timing Diagram
Amplifier Block
Radio Signal
Amplifier
Power
Out to speakers
Parts
Emergency Response Radio
Control Block
Tone Recognition
1 Notch Filter
3/4 OPA4134
6 1.76k Resistor
3 100n Capacitor
1 17.6k Resistor
2 100u Capacitor
3 Comparator
1/4 LM124 OP AMP
2 100u Capacitor
3 Voltage Follower
1/4 LM124 OP AMP
2 100u Capacitor
1 Integrator
1/4 LM124 OP AMP
3 100u Capacitor
1 90k Resistor
1 Virtual Grounding Circuit
1 UA7810
1 UA7805
1 3-input AND gate
1/3 74HCT11
1 853Hz Tone Decoder
1 LM567
1 1.065k Resistor
1 20k Potentiometer
3 1u Capactor
1 0.01u Capacitor
1 0.02u Capacitor
1 853Hz Tone Decoder
1 LM567
1 1.065k Resistor
1 20k Potentiometer
3 1u Capactor
1 0.01u Capacitor
1 0.02u Capacitor
1 960Hz Tone Decoder
1 LM567
1 1.065k Resistor
1 20k Potentiometer
3 1u Capactor
1 0.01u Capacitor
1 0.02u Capacitor
Logic Controller
1 4010E FPGA
1 27C266 EEPROM
4 0.01u Capacitor
1 3x2 header
1 DIP-4 switch
Switches
3 HSR412 Solid-state relay
Amplifier Block
1
9
2
1
1
1
4
2
TDA8944AJ amplifier
220n Capacitor
4.7n Capacitor
100n Capacitor
1000u Capacitor
10u Capacitor
4 Resistor
20k Potentiometer
Radio Block
1 TEA5710 AM/FM demodulator
Tuner
7 Fixed Tuner Capacitors
4 Fixed Tuner Inductors
1 Single knob x 4 Capacitors
Demodulator
2 100uF Capacitor
1 10uF Capacitor
2 10nF Capacitor
1 22pF Capacitor
1 4.7nF Capacitor
1 625uH inductor with center tap
1 625uH transformer
2 180pF Capacitor
1 60nH Inductor
2 Oscillator - SFE10.7MS
1 Oscillator - CDA10.7MC40
1 FM/AM Antenna
Division of Labor

Isolation Circuit & Demodulator
– Jeff

Control block
– Ashok: tone recognition
– Joe: control logic

Amplifier Block
– Chris

Documentation
– Entire group
Schedule
Deliverables

Milestone 1
– Amplifier block built and tested
– Radio block built and testing

Milestone 2
– Control block built and tested

Final Expo
– Integration of all blocks
Questions