1. Poolside Alarm Jay Bombien – BSEE Darren Pallesen- BSEE
Lead Report Manager
Darren Pallesen- BSEE
Lead Project Integrator
Louis Chatfield- BSEE
Lead Presentation Manager
Peter Brunner- BSEE
Lead System Designer
Milja Cumbo- BSEE
Lead Manufacturing Mgr

2. Major Functions and Features
Monitor a pool for potential hazardous situations
Loud audible alarms when a child falls in unnoticeably
Features:
Outdoor unit will display water temp, air temp, and low battery indicator
Solar cells on poolside unit to keep outdoor battery charged
User Control On/Off

3. Poolside Alarm
The device will monitor a pool for potential hazardous situations. (i.e. child falling in)
Indoor unit will display water temp, air temp, and low battery indicator.
Wireless home receiver and display unit with loud audible signal.
Solar cells on poolside unit to keep outdoor battery charged.

4. Similar Existing Product
Poolside Alarm
Similar Existing Product

5. Poolside Alarm Block Assignment
Louis
Peter
Jay
Darren
Milja
Outdoor
Indoor
Power Supply
Power Supply
Air / Water
Sensor
Alarm RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

6. Standard Requirements
System Standard Requirements:
Market:
Est. Total Market Size $1,000,000
Est. Annual Vol ,000
Min. List Price $250
Manufacturing:
Min. Total Parts Count
Max. Unique Parts Count
Max. Parts & Materials Cost $175
Max. MFG Assembly / Test Cost $50
Life Cycle:
Est. Max. Production Lifetime years
Product Life Reliability in MTBF years
Full Warranty Period days

7. Standard Requirements
Power Sources
Indoor:
Source(1): 120Vac 108V to 138V
Frequency Range: Hz
AC Power Dissipation: mW
Plugs: Type B (Flat blades with round grounding pin)
2.1 mm male-to-female DC Plug
Source(2): 3AA 3.9V to 4.8V
Battery Power: mAh
Outdoor:
Source(1): Solar Cell V to 16.2V
Source(2): 8AA V to 12.6V
Battery Power mAh
Max. Total Power W

8. Performance Requirements
Mechanical:
Max. Product Vol ,000
Max. Shipping Container Vol ,000
Max. Product Mass kg
Max. # of boards
Max. Total PCB Area cm2
Max. Shock Force
Indoor G’s
Outdoor G’s
Max. Shock Repetitions / Year
Environmental:
Operating Ambient Temp. Range °C to 50°
Operating Ambient Humidity Range %Rh to 100%Rh
Operating Altitude Range to 1.5 ATM
Storage Ambient Temp. Range °C to 80°C
Storage Ambient Humidity Range %Rh to 100%Rh
Storage / Shipping Altitude Range m to 3000m
Max Storage Duration 3 years

9. Safety Standards UL 464 - Audible Signal Appliances
Electrically and electronically operated bells, buzzers, horns, and similar audible signal appliances intended for indoor or outdoor locations.
UL Flat-Plate Photovoltaic Modules and Panels
Flat-plate photovoltaic modules used as either freestanding or attached to buildings
PS , Provisional Specification for Pool Alarms
Alarms sound at poolside and in adjacent buildings when a minimum weight of 18 lbs hits the water.
Alarms sound at poolside and in adjacent buildings that a minimum sound of 80dB at 100ft is possible
IEC
Safety of power transformers, power supply units and similar devices

10. Key Risk Areas
Developing and implementing a wave sensor could be very complicated
Not much market on workable child safety poolside devices
Difficulty to present prototype.
Sensor Interfacing
Power Supply interfacing with step-down transformer
Outdoor product requiring waterproofing
Needs to be near foolproof, should not go off with falling branches, excessive wind, etc.

11. EMC Standard Summary Table
US/FCC: 47 CFR 15 - Radio Frequency Devices 47 CFR 18 - Industrial Scientific and Medical Equipment
EMC Part 3: Limits - Section 3: low-voltage supplies <16A EMC Part 4: Test/measurement techniques - Section 2: ESD immunity tests EMC Part 4: Test/measurement techniques - Section 3: Radiated radiofrequency immunity EMC Part 4: Test/measurement techniques - Section 6: Conducted radiofrequency immunity EMC Part 4: Test/measurement techniques - Section 11: Voltage dips, short interruptions and variations
CISPR: 11 Limits and methods of measurement for Industrial, Scientific and Medical Equipment 16 Specifications for Radio Interference Measuring Apparatus and Measurement Methods 22 Limits and Methods of Measurements of Radio Interference of Information Equipment

12. Design Plan Summary Total Manpower Total Material Cost
Estimated: 1750 hrs Available: 975 hrs
Total Material Cost
Estimated: $337 Available: $350
Percentage of total manpower
System Design Tasks: 15%
Detailed Design Tasks: 35%
Verification Tasks: 15%
Documentation Tasks: 35%

13. Prototype Summary Slide
Total # of bds
8 bds – 1 for Each Block
Total PCB area (cm2)
B1(40), B2(65), B3(40), B4(50), B5(50),
B6(40), B7(50), B8(90)
Total = 425
Technology:
Perfboard, PCB, Breadboard
Soldering & Wirewrap

14. Gantt Chart

15. Outdoor Power Supply
Peter Brunner

16. Poolside Alarm Block Assignment
Peter
Outdoor
Indoor
Power Supply
Power Supply
Alarm
Air / Water
Sensor RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

17. Functional Purpose To receive Infra red rays from the sun
to charge the solar panels
To recharge the battery through a regulator when it loses 10% of its power.
To output the required regulated voltage for the other block power inputs

18. Performance Requirements
Electrical Interfaces:
Signal Type: Power.
Power Consumption: 2W
Signal Direction: Input / Output.
Battery Type: 8AA
Output Voltage:
Nominal: 3.3 Range: 3-3.6
Nominal: 12 Range:
Nominal: 9 Range:
Output Current max. : 1 A
Input Voltage:
Nominal: Range: 13.3 – 16.4
Input Current max: 120 mA
Safety Standard:
UL Flat-Plate Photovoltaic Modules and Panels
EMC Standard:
EMC : Limitation of voltage fluctuations and flicker in low-voltage supplies <16A

19. Standard Requirements
Mechanical
Block cost <$65
Parts count <15
Unique parts count <6
PCB Area cm2
Environment:
Operating temperature range 5 to 55 C
Storage temperature range -20C to 65C
Operating humidity 0 to 100%
Life Cycle
Reliability MTBF years
R(1 warranty) %
Disposal Throw away
Percent Allocations % of cost
10% of parts
9% of PCB area

20. Block Assignment Sun Charging Circuit Battery Switching Regulator
15.4V
12V
Charging Circuit
Battery
Switching Regulator
3.3V 9V
Other Blocks

21. Electrical Interfaces

22. Parts Count Reliability
Total Fits = , Total MTBF (yrs) = 237.3
R(30 day warranty) = e^(-0.8/237.3) * 100% = 99.7%
Dominant Failure part is the Flexible Solar Panel. Not much can be done to improve this part for higher reliability.

23. Prototype Plan Block Name Block Area (cm2) Total PCB Area (cm2) PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
Outdoor Power Supply
200 40
Perfboard
Solder
Switching regulators
6 AA Battery Clip

24. Indoor Power Supply
Jay Bombien

25. Poolside Alarm Block Assignment
Jay
Outdoor
Indoor
Power Supply
Power Supply
Alarm
Air / Water
Sensor RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

26. Block Description and Purpose:
Indoor Power Supply
Block Description and Purpose:
Electrical device that will transform the standard wall electricity (AC) to lower voltages (DC).
The DC voltage will power the indoor control panel, RF transceiver, and the alarm.
Will charge the battery unit used as the backup power system.

27. Standard Requirements
Indoor Power Supply
Standard Requirements
Block cost <$25
Parts count <18
Unique parts count <8
PCB Area cm2
Power consumption 3 W
Operating temperature range 5 to 55 C
Storage temperature range -20C to 65C
Reliability MTBF years
Operating humidity 0 to 100%
Disposal Throw away
Percent Allocation:
Cost: 10.0%
Parts: 11.25%
PCB: %

28. Performance Requirements
Indoor Power Supply
Performance Requirements
* Electrical Interfaces:
Signal Type: Power
Signal Direction: Input / Output.
Output Voltage: Nominal: 3.3 VDC (Range: 3.0 – 3.6 VDC)
V-Ripple max. : mV
Output Current max. : 1 A
Input Voltage: Nominal: 120 VAC (Range: VAC)
Input Current max: A
Safety Standard:
IEC : Safety of power transformers, power supply units and similar devices EMC Standard:
EMC Standard:
EMC : Limitation of voltage fluctuations and flicker in low voltage supplies <16A

29. Indoor Power Supply Alarm AC/DC Converter Block DC Regulator Circuit
Battery
Charger Circuit
Converter/Charger
Switch
Alarm
Battery
DC Regulator
Circuit
Indoor MPU and Display

30. Signal Input/Output Summary
Indoor Power Supply
Signal Input/Output Summary

31. Indoor Power Supply Prototyping Plan Block Name Block Area (cm2)
Total PCB
Area (cm2)
PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
Indoor Power Supply 90 65
Perfboard
Solder
None
2.1mm male/female

32. Block Parts Count Reliability
Indoor Power Supply
Block Parts Count Reliability
Total FITs: Total MTBF (years): 7.8
The MOS Digital ICs are most unreliable
R = 90.25%

33. Indoor MPU and Display
Darren Pallesen

34. Poolside Alarm Block Assignment
Darren
Outdoor
Indoor
Power Supply
Power Supply
Alarm
Air / Water
Sensor RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

35. Indoor MPU and Display Block Description
Allows user to turn the unit on/off. Also allows user to deactivate both alarms from inside.
Receives signals from the transceiver (alarm activated, alarm deactivated from outside, outdoor unit power off, and low battery).
Transfers signals to alarm (activate/deactivate).
Sends signals to the indoor display unit for user visibility (power on, low battery, alarm activated).

36. Indoor MPU and Display Performance Requirements
User Indicators and Displays:
Indicator Parameters: Power On, Outdoor Unit Power Off, Low Battery, Alarm Activated.
Indicator Color and Type: Amber LED, Green LED, Green LED, Red LEDs.
Indicator Viewing Environment: Indoor Lighting, Complete Darkness.
Electrical Interfaces:
Power Consumption: 1 W
Signal Types: DC Power, Digital.
Signal Directions: Input, Bi-Directional, Output.
Input Nominal Voltage: 3.3 VDC Range: 3.0 VDC – 3.3 VDC
Input Current Max: 24 mA
Output Nominal Voltage: 3.3 VDC Range: 3.0 VDC – 3.3 VDC
Output Current Max: 24 mA
EMC Standard:
EMC Part 4: Test/measurement techniques - Section 2: ESD immunity tests

37. Indoor MPU and Display Standard Requirements
Mechanical:
Block Cost < $25
Parts Count < 16
Unique Parts Count < 5
PCB Area cm2
Environmental:
Operating temperature range 5 to 55 C
Storage temperature range -20C to 65C
Operating humidity 0 to 100%
Life Cycle:
MTBF(years) years
R(warranty) %
Disposal Throw away
Percent Allocation:
Block Cost 10% of Total
Parts Count 10% of Total
PCB Area 9% of Total

38. Indoor MPU and Display Block Detail
Alarm Turn-Off
User
Control
Power Supply
Power On / Off
3.3V
Alarm Activated
MPU RF
Transceiver
Alarm Turn-Off
Alarm On / Off
Low Battery
Alarm
Outdoor Unit Power Off
Alarm Turn-Off
Outdoor
Unit
Off
Digital Signals
Low
Battery
Alarm
Activated
Power On
Analog Signals
Display (LED Indicators)

39. Indoor MPU and Display Electrical Interfaces
Power Signals
Type
Direction
Voltage
Voltage Range
Freq
Freq Range
% V-Reg
V-Ripple
Current
Nominal
Min
Max
Outdoor Supply
DC Power
Input
3.3V
3.0V
3.6V DC
N/A
+/-9%
0.1V
260mA
Digital Signals
Type
Dir
Output
Input
Tech
Freq
Logic
Input Characteristics
Output Characteristics
Str.
Nom.
Voltage
Vih Min
Iih Max
ViL Max
IiL Max
Voh Min
Ioh Max
VoL Max
IoL Max
Sensors from RF
Digital
Bidir
Tri
Std
CMOS
2.0Mhz 3V
2.0V
5uA
0.8V
-5uA
2.4V
-24mA
0.5V
24.0mA
MPU to Display
N/A
3.0V
MPU to Siren
User Input

40. Indoor MPU and Display Parts Count Reliability Estimation
Component Description
Qty
Base l FITs
Max Rated Temp Co (Tr)
Max Oper Temp Co (Ta)
Max Rated Voltage (Vr)
Max Oper Voltage (Va) pT pV pE pQ
Total l
M4A3 64/32-10 JC CPLD 1 31
150 70
4.5
3.6
1.999
7.389
1.000
1.250
TTL Clock
13.3 40 15
3.394
0.186
Capacitor 2
1.2
125
100
1.201
0.140
LED 6 25 4
2.1
0.884
0.409
Resistor 10
200
0.138
 Total 16
Total
621.57
MTBF(years) =
R(30 day warranty) = e^-(0.8 / ) = = 99.57%
The dominant part for unreliability is the CPLD chip. Not much can be done to improve the reliability of this part because of the amount of gates in the IC.

41. Indoor MPU and Display Block Prototyping Plan Template
Name
Block Area (cm2)
Total PCB
Area (cm2)
PCB
Substrate
Type
Component
Attachment
Socketed
Components
Types of
Connectors
Indoor MPU and Display 75 40
PCB, Perfboard
Solder
ICs, Lattice Chip
2.1mm male/female connector

42. Wave Sensor
Jay Bombien

43. Poolside Alarm Block Assignment
Jay
Outdoor
Indoor
Power Supply
Power Supply
Alarm
Air / Water
Sensor RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

44. Block Description and Purpose:
Wave Sensor
Block Description and Purpose:
Sensing unit that will detect the presence of wave motion in the pool.
This signal will be passed through an A/D converter and then on to the RF transceiver.

45. Standard Requirements
Wave Sensor
Standard Requirements
Block cost <$20
Parts count <12
Unique parts count <2
PCB Area cm2
Power consumption <2.25 W
Operating temperature range 5 to 55 C
Storage temperature range -20C to 65C
Reliability MTBF years
Operating humidity 0 to 100%
Disposal Throw away
Percent Allocation:
Cost: 8.0%
Parts: 7.5%
PCB: %

46. Performance Requirements
Wave Sensor
Performance Requirements
* Electrical Interface:
Signal Type: Power.
Signal Direction: Input
Input Nominal Voltage: 9 VDC (Range: 8.1 – 9.9 VDC)
Input Current max: 0.5 A
* Data Interface:
Signal Type: Digital
Signal Direction: Output
Input Nominal Voltage: 1.4 VDC (Range: 0.8 – 2.0 VDC)
Input Current max: 5 uA
EMC Standard:
EMC Part 3: Limits - Section 3: Limitation of voltage fluctuations and flicker in low-voltage supplies <16A
EMC Part 4: Test/measurement techniques - Section 11: Voltage dips, short interruptions and variations

47. Wave Sensor Data Lines Power Lines Outdoor Power Supply
Oscillator Circuit
Voltage Comparator RF
Transceiver
Wave Sensing Unit
Data Lines
Power Lines

48. Signal Input/Output Summary
Wave Sensor
Signal Input/Output Summary

49. Wave Sensor Prototyping Plan Block Name Block Area (cm2) Total PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
Water Sensor 50 30
Perfboard
Solder
None

50. Block Parts Count Reliability
Wave Sensor
Block Parts Count Reliability
Total FITs: Total MTBF (years): 9.9
The MOS Digital ICs are most unreliable
R = 92.24%

51. Air & Water Temp Sensor
Peter Brunner

52. Poolside Alarm Block Assignment
Peter
Outdoor
Indoor
Power Supply
Power Supply
Alarm
Air / Water
Sensor RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

53. Function To measure the current pool water and outdoor air temperature
To convert the temperature into a positive digital voltage to be sent to the MPU with an accuracy of ±3C (max) over a range of 5C to 55C

54. Performance Requirements
Voltage
Power Consumption: <5 W
Supply = 3.3V ± 10%
Output = 3.3 V high, 0V low
A/D converter: 8-bit.
Input = 0 – Vac
Current
Output < 25 mA
Accuracy
±3C over full range
.195C / bit
EMC Standard:
EMC Part 4: Test/measurement techniques for ESD immunity tests

55. Standard Requirements
Mechanical
Block cost <$35
Parts count <25
Unique parts count <8
PCB Area cm2
Environment:
Operating temperature range
Water 5 to 55 C
Air 5 to 55C
Storage temperature range -20C to 65C
Operating humidity 0 to 100%
Life Cycle
Reliability MTBF years
R(1 Warranty) %
Disposal Throw away
Percent Allocations % of cost
16% of parts
12% of PCB area

56. Block Assignment 3.3 V Power Supply Temp Sensors Low-Pass Filter
(Passive)
Amplifier
A/D converter
8-Bit
Data Lines
Power Lines
RF Transceiver

57. Electrical Interfaces

58. Parts Count Reliability
Total Fits = 282.7, Total MTBF (yrs) = 403.5
R(30 day warranty) = e^(-0.8/403.5) * 100% = 99.8%
Dominant Failure part are the CMOS A/D converters. Not much can be done to improve these.

59. Prototype Plan Block Name Block Area (cm2) Total PCB Area (cm2) PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
Air / Water Temp Sensor
100 50
Perfboard
Solder
Wire wrap
None

60. Motion Sensor
Louis Chatfield

61. Poolside Alarm Block Assignment
Louis
Outdoor
Indoor
Power Supply
Power Supply
Alarm
Air / Water
Sensor RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

62. Function
This block utilizes a passive motion IR motions signal which is when tripped by a person near a pool.
IR sensor detects body heat from a human sends a signal
The motion sensor sends a digital signal to the Outdoor MPU.
Once the Outdoor MPU receives this signal, it triggers the indoor and outdoor alarms.

63. Performance Requirements
Power Inputs
DC Power 10 – 13 VDC
Current Draw <= 17 mA
Coverage Wide Angle
40 ft x 40 ft (12m x 12m)
Actual Beam Coverage: 40 ft x 20 ft (12m x 6m)
Electrical Interfaces
Digital input from motion sensor
Digital signal is conveyed the outdoor MPU
Safety Standards:
UL 508C – Power Conversion Equipment
UL 2017 – General Purpose Signaling Devices and Systems
IEC – Electro Static Discharge

64. Standard Requirements
Mechanical
Block cost <$30
% Cost Allocation 20%
Parts count <25
Unique parts count <5
PCB Area cm2
Environment:
Operating temperature range 5 to 55 C
Storage temperature range -20C to 65C
Operating humidity 0 to 100%
Life Cycle
Reliability MTBF years
Disposal Throw away

65. Block Diagram OUTDOOR POWER SUPPLY 9V PASSIVE IR SENSOR 9V – 16V
REGULATOR
12 VDC
POWER
POWER
POWER
OUTDOOR MPU
RF TRANSCEIVER
REGULATOR
3 V
FILTER/ SMOOTHING
CIRCUIT
SIGNAL
SIGNAL
SMOOTHING: KEEPS DC VARYING TO ONLY A SMALL RIPPLE
REGULATORS: ELIMINATES RIPPLE BY SETTING DC OUTPUT TO FIXED VOLTAGE

66. Signal Input/Output Summary
PWR Signal
Type
Direction
Nom
Vol.
Voltage Range
Min Max
Freq
Freq Range
Min Max
%V-reg
Max
V-ripple
Curr.
Motion
Sensor
DC /
DIG
Output
3.3 3
3.6 DC
N/A
.05
.1 V
17 mA

67. Parts Count Reliability Estimation
MTBF = 28.3 YEARS. RELIABILITY = 97 %
MOST DOMINANT PART RELATED TO UNREALIABILITY IS THE CAPACITORS

68. Prototyping Plan Block Name Block Area (cm2) Total PCB Area (cm2) PCB
Substrate
Type
Component
Attachment
Socketed
Components
Types of
Connectors
Motion
Sensor (IR)
Block 6
155 60
Breadboard/ Perfboard
Spring Loaded
Connection/
Solder
IC socket
N/A

69. RF Transceiver
Milja Cumbo

70. Poolside Alarm Block Assignment
Milja
Outdoor
Indoor
Power Supply
Power Supply
Alarm
Air / Water
Sensor RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

71. RF Transceiver Block Purpose and Description
To process and control data from sensors, power supplies, and switches
To transmit and receive data between outdoor and indoor units
Block Description
Read input digital signals from sensors into the Outside Controler
Send processed data to the Outdoor Transceiver
Control push button switch with debounce component and ESD
protection
Send processed digital signal to the Transceiver
Send/Receive wireless signal to/from the Transceiver
Send/Receive the data signal to/from the Indoor Controler

72. RF Transceiver Product Performance Requirements
Electrical Interfaces:
Different Signal types: Digital, DC Power Supply.
Different Signal Directions: Input, Output, Bi Directional
Input Current max: 24 mA
Output Nominal Voltage: 3.3 VDC
Output Current max: 24 mA

73. RF Transceiver Product Safety Requirements
UL Audible Signal Appliances
Electrically and electronically operated bells, buzzers, horns, and similar audible signal appliances intended for indoor or outdoor locations.

74. RF Transceiver Product Standard Requirements
Block cost <$40
Parts count <20
Unique parts count <5
PCB Area cm2
Power consumption <5W
Operating temperature range 5 0C to 55 0C
Storage temperature range C to 65 0C
Reliability MTBF yrs.
Operating humidity 0 to 100 %
Disposal Discard

75. EMC Standards Summary
US/FCC: 47 CFR 15 - Radio Frequency Devices CFR 18 - Industrial Scientific and Medical Equipment EMC Part 3: Limits - Section 3: Limitation of voltage fluctuations and flicker
in low-voltage supplies <16A EMC Part 4: Test/measurement techniques - Section 2: ESD immunity tests EMC Part 4: Test/measurement techniques - Section 3: Radiated
radiofrequency immunity tests EMC Part 4: Test/measurement techniques - Section 6: Conducted
Radiofrequency immunity tests
CISPR: 11 Limits and methods of measurement for Industrial, Scientific and Medical Equipment
16 Specifications for Radio Interference Measuring Apparatus and Measurement
Methods Limits and Methods of Measurements of Radio Interference of Information
Technology Equipment

76. RF Transceiver Block Diagram
digital signals
digital signals
Alarm Activated
Alarm Deactivated
Low Battery
Power ON/OFF
Alarm Deactivated From Inside
Water Sensor
Motion Sensor
Outside Controller
AirTemp.Sensor
WaterTemp Sensor
Power ON/OFF
Low Battery
Outdoor
Transceiver
Indoor Transceiver
Outdoor Antenna
Indoor Antenna

77. RF Transceiver Input/Output
Digital Signals
Type
Direction In
Out
Tech
Freq.Nom
Logic V
Water Sensor
Digital
Input
Std
CMOS
2.0 MHz 3V
Motion Sensor
Air Temp.
Water Temp.
Power ON/OFF
BiDir
Low Battery
Sensors to Indoor MPU
Output
Alarm Activated
Alarm Deactivated

78. RF Transceiver Input/Output contd.

79. RF Transceiver Input/Output contd.
Type
Dir V-
Nom
Voltage
Range
Frequency
%V-
Reg
Ripple
Current
min
max
DC Power
Indoor
Input
3.3V
3.0 V
3.6 V
N/A
+/-9V
100 mV
100 mA
Outdoor
100mA

80. RF Transceiver Parts Count Reliability
Component Description
Qty
Base l FITs
Max Rated Temp Co (Tr)
Max Oper Temp Co (Ta)
Max Rated Voltage (Vr)
Max Oper Voltage (Va) pT pV pE pQ
Total l
Metal Film Resistor Indoor 1
0.2
105 65
250 10
4.678
0.141
1.000
1.250
Metal Film Resistor Outdoor 3
2.555
0.223
5.000
Electrolytic Capacitor
1.2
150
M4A3 64/32-10JC CPLD 31 70
4.5
3.6
1.999
7.389
Inductor
125
100 15
0.161
MOS Dig IC < 1000 gates Indoor
13.3 85
MOS Dig IC < 1000 gates Outdoor
7.973
3.000
Switch 20 12
0.148
Total 21
The most unreliable part is Mos Dig IC <1000 gates( ). The number of the gates cannot change.

81. RF Transceiver Block Prototyping Plan
Name
Block Area (cm2)
Total PCB
Area (cm2)
PCB
Substrate
Type
Comp
Attachment
Socketed
components
Types of
connectors
RF transceiver 80 50
PCB,
Perfboard
Solder
ICs, Lattice Chip
PCB mount,
male/
female connector

82. Alarms
Louis Chatfield

83. Poolside Alarm Block Assignment
Louis
Outdoor
Indoor
Power Supply
Power Supply
Alarm
Air / Water
Sensor RF
Transceiver
Wave
Sensor
Indoor MPU and Display
Motion
Sensor
Data Lines
Power Lines
Alarm

84. Functionality Purpose: To sound an alarm. Description:
Siren/horn produces a high decibel audible sound (at least 100 dB)
Siren/horn needs to notify the surrounding area there is a possibility of a child jumping into an unsupervised pool.

85. Performance Requirements
Power Inputs
DC Power 2.55 – 3.3 VDC
Current Draw <= 0.7 A
Output
Max 101 dB at 10 feet
Electrical Interfaces
Digital output is sent from Indoor MPU
Digital signal is amplified via audio amplifier, which is sent to the siren/horn
Safety Standard:
UL Audible Signal Appliances
UL 1492 – Audio-Video Products and Accessories
IEC Electro Static Discharge Immunity

86. Standard Requirements
Mechanical
Block cost <$10
% Cost Allocation ~7%
Parts count <10
Unique parts count <3
PCB Area cm2
Environment:
Operating temperature range 5 to 55 C
Storage temperature range -20C to 65C
Operating humidity 0 to 100%
Life Cycle
Reliability MTBF years
Disposal Throw away

87. Motion Sensor Diagram INDOOR MPU 3.3 V DIGITAL SIGNAL AMPLIFIED SIGNAL
AUDIO
AMPLIFIER
SIREN/HORN

88. Signal Input/Output Summary
PWR Signal
Type
Direction
Nom
Vol.
Voltage Range
Min Max
Freq
Freq Range
Min Max
%V-reg
Max
V-ripple
Current
Alarm DC
Input 9
8.2
9.8
N/A
.05
.25
0.5A

89. Count Reliability Estimation
MTBF = 75.2 YEARS. RELIABILITY = 99 %
MOST DOMINANT PART RELATED TO UNREALIABILITY IS THE CAPACITORS

90. Prototyping Plan Block Name Block Area (cm2) Total PCB Area (cm2) PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
Alarm
165 40
Breadboard/Perfboard
Spring Loaded Connection/
Solder
IC Socket
N/A

91. Project Reliability Rollup

92. Reliability Assessment
F(w) = 0.04 = 4% failures within the warranty period of 30 days.
R(w) = 0.96 = 96% reliability within the warranty period.
To get a reliability of R(w) = 99%, we found that we had to reduce our warranty to t = 0.02 or 7 days.
Our group decided to stick with the 30 day warranty so that consumers would have more confidence in our product.

93. Reliability Summary Most Unreliable Parts Improvements
CPLD
NPN Phototransistor
LM 555 IC
Relay
LM 3909 IC
Electrolytic Outdoor Capacitor
Mos Dig IC < 1000 Gates – Outdoor
Photovoltaic Cells
Improvements
Can research and maybe choose better qualified parts for low reliability components
Could buy higher efficient components, but would be much more costly.
Protect against voltage and current swings so parts do not get close to their max ratings.

94. Reliability Growth Plan - Outside
Stress
24 Hour
Model
10 Year Model
Accelerated Stress Model
Accelerated 1 Cycle Time
Acceleration Factor
Max Input Voltage
9.6V
9.6
N/A
Number of Power Cycles
0.1
100
Thermal Range
20C – 45C
20C-45C
Number of Thermal Cycle 1
720
Max Shock Grms 10
Number of Shock Cycles
150
- We are probably not going to test these prototypes for these types of tests except the input voltage cycles. We will probably test all prototypes for this. The other requires an environmental chamber and the G-force one could be destructive.

95. Reliability Growth Plan - Outside
Stress
24 Hour
Model
10 Year Model
Accelerated Stress Model
Accelerated 1 Cycle Time
Acceleration Factor
Max Input Voltage
4.8
N/A
Number of Power Cycles
0.1
100
Thermal Range
15C – 30C
15C –30C
Number of Thermal Cycle
0.2
350
Max Shock Grms 50
Number of Shock Cycles
300
- We are probably not going to test these prototypes examples for these types of tests except the input voltage cycles. We will probably test all prototypes for this. The other requires an environmental chamber and the G-force one could be destructive.