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Capstone Design Project EE 318-595 Spring 2004 Design Team No. 1 Security Dialer. Eric Biehr Mario Divis Igor Stevic Edwin Sofian Kelly Chapin. Design Team Members. Mario Divis. Edwin Sofian. Kelly Chapin. Igor Stevic. Eric Biehr.

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slide1

Capstone Design Project

EE 318-595 Spring 2004

Design Team No. 1

Security Dialer

Eric Biehr

Mario Divis

Igor Stevic

Edwin Sofian

Kelly Chapin

slide2

Design Team Members

Mario Divis

Edwin Sofian

Kelly Chapin

Igor Stevic

Eric Biehr

security dialer project selection

This design is favored because it offers individual challenges to each team member, is easily scalable and covers many electrical design aspects as well as project requirements.

  • Major risks include exceeding the projected budget and over-scoping of project blocks.
  • Other projects were rejected because they were not complex enough to satisfy high level requirements.
  • This project was unanimously supported by all team members.

Security Dialer Project Selection

product definition

Automated home security monitoring system

    • Emergency status notification through phone line
    • Internet status monitoring including remote control of the system
    • CO monitoring, door or window opening, standing water sensor and AC power failure notification
    • Backup DC battery in the event of AC power failure
    • Audible alarm in case of an emergency

Product Definition

  • The home security system is a common product on the

market but the internet and phone access makes it unique

  • This product belongs to a general consumer products/home

security industry

slide5

Standard Requirements

  • Major competitors include ADT, Brinks, CyberEye and GE
  • Annual volume of 5000 units
  • To be sold to North American home owners
  • Installation intended by user or contractor, distributed by retailers
  • Intended purpose is for life and asset protection
  • Indoor use only
  • Temporary 60Hz 120VAC power supply with permanent 12VDC rechargeable reserve battery
  • Stainless steel prototype enclosure
  • 12 months replacement warranty
  • Recycle product according to government regulations
  • Product Life of 100,000 Hours MTBF
slide7

Performance Requirements

  • Armed and Standby operational modes
  • LCD output displaying status indication and user menu
    • Viewable within 1 meter
    • 20 x 4 character display
    • Backlight option for increased visibility
  • 16 key Alpha-Numeric Keypad for user operation and functionality
  • Panasonic Omni-directional Electret Microphone
  • Audible siren >100dB
  • External electrical interfaces
    • RJ11 phone line output
    • RJ45 Ethernet connection
    • AC standard 3-prong Nema input
    • Three 3mm single row 2 and 3 pin Molex sensor input connectors
slide8

Performance Requirements

  • Unique components
    • Atmel AVR AT90S8515 microprocessor
    • Winbond ISD2560 voice recording chip
    • Holtek HT93214A dialer chip
    • Clare M98202 Precise Call Progress Tone Detector
    • Sena Technologies Ethernet controller and web server
slide9

Safety Regulation Requirements

  • Federal Communications Commission
    • Part 68
      • Governs the direct connection of terminal equipment to the Public Switched Telephone Network
      • Contains rules concerning for automated dialing machines
  • Underwriters Laboratory Standards
    • UL639
      • Intrusion-detection units intended to be used in burglary-protection signaling systems
    • UL1023
      • Household burglar-alarm system units
    • UL1950
      • Mains-powered or battery-powered information technology equipment
  • Canadian Standards Association
    • CSA C22.2 No. 205
      • Signal equipment
    • CSA C22.2 No. 60950
      • Information technology equipment
slide10

Electromagnetic Compatibility Standards

  • EN50081-1: 1992
    • Generic emission standard, part 1: residential, commercial

and light industry

  • EN50082-1: 1997
    • Generic immunity standard, part 1: residential, commercial

and light industry

  • EN55022 – CISPR 22
    • Emission requirements for information technology equipment
  • EN55024 – CISPR 24
    • Immunity requirements for information technology equipment
slide12

Power Supply

+5V

Edwin

Eric

Igor

Kelly

Mario

VAC

VDC

+12V

3

Phone Line

Siren

Ringback Detection

Dialer

10

6

9

Embedded Ethernet Controller /Web Server

Micro-controller

Voice Recording

Internet

Microphone

8

1

7

7

Sensors

LCD

Keypad

2

5

4

power supply performance requirements
Power Supply Performance Requirements
  • Power Source Inputs
    • Temporary 60±3Hz 120+10%/-15%VAC power using standard 3 prong detachable 6’7” Nema plug connecting to IEC 320 AC receptacle with external 5 x 20 mm fuse holder for consumer accessibility
    • Permanent reserve 12VDC 7.2Ahr 86.4Watt-hrs maintenance-free rechargeable AGM sealed lead-acid battery (5.5 lbs)
power supply performance requirements1
Power Supply Performance Requirements
  • AC and DC powered modes
    • Transistor and diode switching circuit routes power from DC battery if AC power source fails
      • Logic signal (VOH: 3 to 5.5VDC, VOL: 0 to 1.5V; Io: 40mA max)

sent to microprocessor and web server to display notification on

LCD and security web page when operating in DC powered mode

  • Interfaces
    • Mechanical:
      • AC input line cord
    • Electrical:
      • Voltage input from AC source and DC battery source
      • Voltage outputs to system components with 3 pin connector
  • Switching frequency > 200kHz
  • Voltage Ripple and Noise < 50mV
  • Load Regulation < 5% for 30% load change
  • Line Regulation < 5% for 15% line voltage change
slide19

Power Supply Block Diagram

Microcontroller &

Web Server

Logic Signal 40mA

60Hz

120VAC

VOH=5V, VOL=0.7V

Siren 1A

Microcontroller 40mA

24VAC

Transformer,

Rectifier &

Voltage

Regulator

Voltage

Regulator

Power Mode Detection & Switching Circuit

Switching Regulator

Dialer 70mA

Voice Chip 45mA

+18VDC 3A

+12VDC 2.5A

+12VDC 2.5A

+5VDC 1A

LCD 500mA

Web Server 300mA

Keypad 5mA

Ringback Detection 15mA

Sensors 70mA

Voltage Regulator Battery Charger

DC battery

12V 7.2Ahr

+13.65VDC 300mA

slide21

Power Supply EMC, Safety Standards and Disposal

  • Electromagnetic Compatibility Standards
    • EN 61204-3:2000
      • Low voltage power supplies with DC output
    • EN 50081-1:1992
      • Generic Emission Standard for residential, commercial and light industry
    • EN 50082-1:1997
      • Generic Immunity Standard for residential, commercial and light industry
  • Safety Regulation Standards
    • UL 603
      • Power supplies for use with burglar-alarm systems
    • UL 1236
      • Battery chargers for charging engine-starter batteries
  • Recycle materials according to city/government regulations
slide22

Power Supply Safety Devices

  • UL compliant molded AC line cord and IEC 320 Receptacle
  • External 3A fuse within IEC 320 receptacle to provide over-current protection
  • 145V Varistor to provide suppression of transient voltage
  • Properly rated self-resetting fuses used throughout circuitry to provide over-current circuit protection
  • Diodes to protect voltage regulators and DC battery from voltage polarity reversal
  • Transformer provides electrical isolation between AC source and system
slide25

LCD module Performance requirements

  • The LCD module displays the status of the whole system.
  • A user will be presented a menu with choices of what action/instruction a user wants to take regarding configuration/setup and arming the system
  • When a certain choice has been made a visual display of the chosen option will be shown along with all the information related to the choice
  • A backlight will light up every time a user pushes a key on the keypad
  • A screen will be able to display at least 60 characters
  • A module will have a Hitachi 44780 compatible driver chip
  • Inputs:
      • Data lines
      • 5V DC(+/-10%) power supply for driver and backlight, 1A Max
  • Interfacing through pin header
slide26

20x4 LCD module

GND

LCD Contrast adjust

4.5 < Vdd< 6.5 V

Vmax =6.5 V

Imax = 1mA

+

-

Backlight

power

8/4 bit data bus

3 bit control

line

Vih min = 2.2 V

Vih max = Vdd

Vil min = 0 V

Vil max = 0.6 V

slide27

LCD module Standard requirements

  • Operating Temperature: -10 to 50C
  • Operating humidity: 0 to 85% RH, non-condensing
  • Storage temperature: -30 to 70C
  • Storage humidity: 0 to 90% RH non condensing
  • Production cost: <$10
  • Max Proto cost: <$60
  • Max part count: <10
  • Power consumption: <2W
  • PCB size: 8 x 4 x 1 [cm]
  • Reliability: 20000 Hrs
  • Disposal: According to city/government laws
  • Safety requirements: EN 50081-1:1992, EN 50082-1:1997
slide28

Microcontroller Performance requirements

  • A microcontroller will be from the AVR Atmel family of microcontrollers
  • A clock of at least 4MHz will be used for the microcontroller
  • The microcontroller will be used to control most of the devices/peripherals in the system
  • The microcontroller will be used to control the LCD display by responding to user input as well as monitoring the status of sensors and controlling Ethernet web server
  • Inputs:
      • Sensors, keypad, ring back detection, Ethernet control signals
      • 5V DC(+/-20%) power supply, 50mA Max current
  • Outputs:
      • Siren signal, Ethernet control line, LCD data and control signals, dialer, voice recording
  • It will interface to other devices through the chip connection pins
slide29

AT90S8515 Microcontroller interface

LCD module

8/4 bit

data

3 bit ctrl

8/16 MHz XTAL

GND

Voice recording

Power and Play/REC control

2 bits

4.5 < Vcc< 6.6 V

4 bits

Dialer chip control

4/2 bits

Parallel keypad interface/UART

Sensors control

Web server stand by

and sensor control

4 bits

3 bits

1 bit

2 bits

VIL max = 0.3VCC

VIL min = -0.5 V

VIH min = 0.6VCC

VIHmax = VCC + 0.5

VOLmax = 0.6 V

VOH min = 4.2 V

I I/O max = 40mA

RI/O max = 120k ohm

ICC max = 3mA

1 bit

AC status

signal

Ring back

status

Ring back

enable

slide30

Microcontroller Standard requirements

  • Operating Temperature: -10 to 80C
  • Operating humidity: 0 to 90% RH, non-condensing
  • Storage temperature: -30 to 85C
  • Storage humidity: 0 to 90% RH non condensing
  • Production cost: <$2
  • Max Proto cost: <$12
  • Max part count: <4
  • Power consumption: <1W
  • PCB size: N/A (stand alone product)
  • Dimensions: 5 x 1 [cm]
  • Reliability: 10 years
  • Disposal: According to city/government laws
  • Safety requirements: EN 50081-1:1992, EN 50082-1:1997
telephone basics
Telephone Basics
  • OFF-HOOK Condition:
    • 8 VDC Between Tip and Ring
    • Tip = -20 VDC
    • Ring = -28 VDC
    • DC Resistance = 200-300Ω
    • 20-50mA Current Flow
  • ON-HOOK Condition:
    • 48 VDC Between Tip and Ring
    • Tip = 0 VDC
    • Ring = -48 VDC
    • No current flow

DTMF Dial Tone Frequencies

  • Line Characteristics:
    • Ring Signal: 70 – 120 VAC
    • Bandwidth: 300Hz-3.4kHz
    • Min DTMF Tone Duration: 100ms
dialer performance requirements
Dialer will dial the preset telephone number in the case of an emergency. This will be accomplished by placing DTMF (Dual Tone Multi-Frequency) signal on the telephone line.

Phone number will be stored in the Micro-controller memory and sent to the dialer in form of 4-bit binary signal. This signal will be decoded by Dialer circuitry.

Inputs:

4 bit digital signal from micro-controller

Vin (low) = 0-0.8 VDC

Vin (High) = 3.9-5.5 VDC

5V (±10%) DC, 70mA power supply

1 bit Relay Control Signal

Vin (low) = 0-0.8 VDC

Vin (High) = 3.9-5.5 VDC

Relay will be used to close/open phone line

Output:

DTMF signal (697-1477Hz), 0.5VAC Peak max.

Mechanical interface: RJ11 connector to phone line

Dialer Performance Requirements
dialer standard requirements
Operating Temperature: -10 to 60C

Operating Humidity: 0 to 85%RH, non-condensing

Storage Temperature: -40 to 70C

Storage Humidity: 0 to 95%RH, non-condensing

Max Part Count: <35

Max Proto Cost: < $30

Production Cost: <$20

Power Consumption: <1/2W

PCB size: 5 X 10 X 2 (Cm)

Reliability: 1000Hrs MTBF

Disposal: According to government regulations

Safety Requirements: EN 50081-1:1992, EN 50082-1:1997, Part 68 FCC Rules.

Dialer Standard Requirements
voice recording playback performance requirements
Voice recording will record the user’s message which will be played after the telephone communication between the user and system has been established.

The message will be recorded when RECORD signal is received from the micro-controller.

The message will be played when PLAY signal is received from the micro-controller during emergency.

Inputs:

Audio AC signal 300-3400Hz, 50mVP-P Max

Digital control signals RECORD/PLAY and Power Down

0-0.8VDC Low, 3.9-5.5VDC High

5VDC(±10%) power supply, 45mA Max

Output:

300-3400Hz AC signal, 0.5VAC Peak Max

Mechanical Interface: 2-Pin Microphone Connector

Voice Recording/Playback - Performance Requirements
voice recording standard requirements
Operating Temperature: 0 to 60C

Operating Humidity: 0 to 85%RH, non-condensing

Storage Temperature: -40 to 70C

Storage Humidity: 0 to 95%RH, non-condensing

Max Part Count: <20

Max Proto Cost: < $40

Production Cost: <$30

Power Consumption: <1.25W

PCB size: 5 X 8 X 2 (Cm)

Reliability: 1000Hrs MTBF, >50000 Recording Cycles

Disposal: According to government regulations

Safety Requirements: EN 50081-1:1992, EN 50082-1:1997, Part 68 FCC Rules.

Voice Recording Standard Requirements
embedded ethernet controller and web server performance requirements
OEM Product that will enable two way communication between the user and the device.

User will be able to monitor each sensor status over the internet. User will also have the ability to turn individual sensors on or off and to shut-down/restart the system.

The I/O commands will be transferred through TCP/IP protocol using the internet socket interface. The socket interface will be implemented with Java applet.

Inputs:

4 one-bit digital inputs

0-0.8 VDC Low, 2-5 VDC High

5VDC (±10%) power supply, 300mA

Broadband Ethernet

Embedded Ethernet Controller and Web Server – Performance Requirements
embedded ethernet controller and web server performance requirements1
Outputs:

4 one-bit digital outputs

2.5 – 5 VDC High

Broadband Ethernet

Mechanical Interface:

RJ45 connector

20 pin , two-row I/O connector, 2.5 mm Pitch

Embedded Ethernet Controller and Web Server – Performance Requirements
embedded ethernet controller and web server standard requirements
Operating Temperature: 0 to 60C

Operating Humidity: 0 to 85%RH, non-condensing

Storage Temperature: -40 to 70C

Storage Humidity: 0 to 95%RH, non-condensing

Max Part Count: <40

Max Proto Cost: < $200

Production Cost: <$70

Power Consumption: <1.5W

PCB size: 10 X 6 X 2 (Cm)

Reliability: 1000Hrs MTBF

Disposal: According to government regulations

Safety Requirements: CISPR 22, CISPR 24

Embedded Ethernet Controller and Web Server – Standard Requirements
slide50

Ring Back Detection

Ringback Detection

Power Supply + 5V

Micro controller

Phone Line

Once the alarm is triggered, uC talks to the dialer to dials.

The ring back detection looks for ring-back/busy/dial tone.

It connects to the phone line, detects the signals, and will let the uC

know when the line is answered.

WHY RING BACK ?

Ring Back/ Ring Tone is returned to the calling party to indicate that the called line has been reached and power ringing has started. In the precise tone plan, audible ring back consists of 440 Hz + 480 Hz with a 2 seconds on/ 4 seconds off temporal pattern.

basic call progress1
Divided into 6 phases:

On-hook  Telephone set is in ready condition wait for a caller to

pick up its handset.

Off-hook  Costumer decides to make a phone call and lifts the

handset off the switch hook of the telephone set.

Dialing  Costumer enter a phone number (address) of a tele-

phone at another location.

Switching  Telephone switch translates the tones into a port

address that connects to a telephone set of the

called party.

Ringing  CO switch connects to the called line, and sends

ringing signal to the phone of the called party.

While ringing the called party’s phone, the CO

switch sends ring back tone to caller and lets the

caller know that ringing is taking place at the called

party’s phone.

Talking  As soon as the called party lifts the handset, an off-hook

phase starts again from the opposite site of the network.

The local loop is closed on the called party’s side, and

current starts to flow to the CO switch. This switch detects

current flow and completes the voice connection back to the

calling party’s phone.

Basic Call Progress
precise call progress tone detection
Parts #: M-982-02P ~ 22-pin plastic DIP

Audible tones sent from switching systems to calling

parties to show the status of calls

Calling parties can identify the success of a call placed by

what is heard after dialing

Operation Theory:

The use of IC techniques allows the M-982-02 to pack the

five filters for call progress following into a single 22-pin

DIP. A 3.58 MHz crystal controlled time base guarantees

accuracy and repeatability

Precise Call Progress Tone Detection
block diagram
Block Diagram

Detector

Outputs

Precise Tone Detector

SIGIN

DET3

XRANGE

DET4

Clock Generator

Power Regulation

PD

Vdd

OE MODE EN

precise call progress tone detector
M-982-02 contains five signals detectors (DET n) sensitive to the frequencies (e.g. Det3-440Hz, Det4-480Hz). In this case, I am going to use 2 frequency signals only for Ring Back.

DET n outputs of the M-982-02P can determine the nature of signals/characters present by measuring their duty cycle.

Duty cycle also refers to as Interruption Rate.

Tri-state timing to latch the signals:

OE is active high input  Z is low

Signal timing:

SIGIN (analog signal input)

DET n (active tri-state output)

STROBE (active high output)

Power Down Timing:

PD is high (logic high inhibits internal clock)

Clock is inactive

Precise Call Progress Tone Detector
input and output signals
The input signals are:       a) EN, OE, XRANGE, MODE (Vil=5V, Vih=3V)         b) Pull-up and Pull down currents (PD = 4 to 10uA)       c) SIGIN pin -> R=80kohm, f=500Hz, V = 5V d) CLOCK -> External connect to XIN

(Vil=0.2, V Vih=4.8V, Duty Cycle=40-60%)     The output signals are :       a) DET n (Vol=0.5V)       b) STROBE pins (Voh=2.2V)       c) DET n pins (Ioz=1uA)     For the logic gates (determine by the frequency below):        - SILENCE:   MODE(X)   DETn(0)  STROBE(0) PD(0)  OE(1)  EN(1)         - DIAL TONE: MODE(0)   DET1(1)  STROBE(1) PD(0)  OE(1)  EN(1) OR                     MODE(X)   DET3(1)  STROBE(1) PD(0)  OE(1)  EN(1)        - RING BACK: MODE(X)   DET3(1)  STROBE(1) PD(0)  OE(1)  EN(1) OR                     MODE(X)   DET4(1)  STROBE(1) PD(0)  OE(1)  EN(1)        - BUSY TONE: MODE(X)   DET4(1)  STROBE(1) PD(0)  OE(1)  EN(1) OR                     MODE(1)   DET2(1)  STROBE(1) PD(0)  OE(1)  EN(1)     For the frequencies:        - DIAL TONE:  350Hz + 440Hz        - RING BACK:  440Hz + 480Hz        - BUSY TONE:  480Hz + 620Hz

Input and Output Signals
standards requirements
Market

Max Prototype cost: $25

Max Production cost: $12

Mechanical

Max Total PCB Area: 100 cm^2

Power

Single supply: 3 to 5 volt

Current Drain (Idd): = 15 mA

Environmental

Storage Temperature: -40 to 150˚C

Operating Ambient Temperature: -40 to 85˚C

Operating Conditions:

Vdd = 2.7 – 5.5V

Vref = 1.296V – 1.404V

Power Supply Noise = 20mVp-p

Standards Requirements
standard requirements
Safety

EMC Standard:

IEC 61000-3-2 (power line harmonics)

IEC61000-4-2 (Electro Static Discharge

Immunity)

Other Standards:

ISO 9001:2000 Certification

ISO 9001:1994 Certification

Standard Requirements
performance requirements
Operation Modes

Power-down mode: 4 to 10 uA

Electrical Interface

- Input : Analog (Linear)

- Outputs: Digital (CMOS compatible), tri-state

- Dynamic range: 30 dB

- Signal Detection Freq Range: -11 to +11 Hz

* Duration (tdd) = 200ms

* Bridge time (tbb) = 20ms

- Signal Rejection Freq Range: -66Hz

* Interval duration (tid) = 160ms

* Time to output (tio) = 200ms

Mechanical Interface

Connector: Phone line (a & b)

Performance Requirements
block ten siren
Siren signal generation comes from the ZSD100 chip. Capacitors are TBD, and are added to vary the siren’s output frequency.

Push-pull amplification is implemented by six transistors, two MS2222 npn transistors, two ZTX690B npn transistors, and two ZTX790A pnp transistors. As it stands, additional amplification may be necessary.

Speaker is made by CUI Inc. Part number GF1004H.

8 ohm

4 inches in diameter

Nominal input of 20W

Block Ten - Siren

The siren block communicates to the user when the security system is triggered via audible alert. This block is located inside of the system’s enclosure. Sound will travel through louvers in the enclosure. Amplifier is a push-pull design. The siren block will be activated by supplying power to the siren driver. Driver chip is ZSD100.

block ten siren1
Block Ten - Siren

Amplification

Speaker

Siren Driver

ZSD100

12 Volt on/off signal

siren specifications
Market - Estimated prototype cost is $20, with a mass production cost of $15.

Power – 12V dc, delivered from the power supply. Minimum operating voltage is 4V, maximum is 18V. Total power consumption is 12W.

Mechanical – Maximum product volume is 64 cubic inches. Individual shipping container volume of 80 cubic inches. Maximum product mass of 1.5 pounds. This circuit will be on the master printed circuit board, and occupy 2.25 square inches. Supply voltage will be transferred via soldered trace. An estimated maximum shock force of 2 G due to the speaker. Product will survive 4 drops. Speaker will be enclosed in a plastic bag for moisture resistance during shipping.

Environmental – Range of operational and storage temperature is -40 C to 70 C. Relative humidity cannot exceed 90-95% at any time. Product can be stored for ten years.

Siren specifications
siren specifications continued
Safety –UL464 (Standard for Audible Signal Appliances)

Manufacturing –The maximum total parts count is 10, 3 of which are unique. The maximum parts and materials cost is $18, and the maximum assembly and test cost is $2.

Life cycle – Estimated maximum production lifetime of ten years, with a factory and/or field service strategy. Product life is estimated to be 15 years, with a three year warranty period. Product will be disposed in accordance to local laws and regulations.

Performance Requirements – The power supply turn the siren on or off.

User indicators – The siren is only one of four ways to inform the user of a zone violation. User will be provided with an estimated 110dB signal from the speaker. The perception distance will be 100 feet indoors, under “normal noise” conditions in a home.

Siren specifications continued
siren specifications continued1
Operation modes – Unit will have two modes, on and off.

Electrical Transfer Performances – THD maximum is 10%, min power gain of 1. A maximum expected delay between when system is triggered, and when the siren is activated, is 2 seconds. Negligible EM field is expected outside of the stainless steel enclosure.

Mechanical interfaces – A four inch paper speaker cone is the only mechanical interface.

Siren specifications continued
block four keypad
Block four - Keypad

The keypad is the mechanical user interface for the security system. It can be used for arming, disarming, system setup, and dialer programming. The user may activate and deactivate the alarm by entering a security code on the keypad. The user also can use the keypad to control various functions of the system.

A Grayhill 96 series keypad will be used. This part was chosen solely upon its price. The E-Lab EDE1144 keypad encoder will be used to interface the keypad to the microprocessor. This encoder was chosen to reduce design time, part costs, and PLD redundancy.

block four keypad1
Block Four - Keypad

4 Parallel Output

EDE1144

Keypad

Encoder

8 I/O Signals

5V Supply

Possible UART Output

keypad specifications
Market - Estimated prototype cost is $18, with a mass production cost of $15.

Power – 5V dc, delivered from the power supply. Minimum operating voltage is estimated to be 4V, maximum is estimated to be 6V.

Mechanical – Maximum product volume is 8 cubic inches. Individual shipping container volume of 10 cubic inches. Maximum product mass of 0.25 pounds. This circuit will be on the master printed circuit board, and occupy 2 square inches. Supply voltage to the keypad will be transferred via pin and socket connector. Supply voltage to the logic will be delivered by a soldered trace on the circuit board. An estimated maximum shock force of 10G. Product will survive 20 drops. Product will be enclosed in a plastic bag for moisture resistance during shipping.

Keypad specifications
keypad specifications continued
Environmental – Operating temperature is form -30 to 80 Celsius.

Safety – None found

Manufacturing – Maximum total parts count is 15, with five being unique parts. Maximum total parts and material cost will be $20, assembly and test cost of $5.

Life Cycle - Estimated maximum production lifetime of ten years, with a factory and/or field service strategy. Product life is estimated to be 15 years, with a three year warranty period. Product will be disposed in accordance to local laws and regulations.

Performance requirements – The keypad will give the user access to all of the system’s functions. Buttons are of the pushbutton type, with a minimum of 0.04 inches of travel. Operating force is 175 grams, maximum is 215 grams, and minimum is 135 grams.

Keypad specifications continued
keypad specifications continued1
User indicators and displays – Sixteen black buttons are alpha-numeric, 0-9, *, #, and A-D. Symbols on keys are white. Each key is 0.308 square inches. Viewing distance is approximately four feet depending on the usurers vision, in normal room lighting.

Operation modes – Power modes are on, and off.

Electrical interfaces – Keypad will be connected to the driver with an 8 pin connector. Logic will be soldered to the main board and employ traces to carry the signals.

Mechanical interfaces – Connector from keypad to main board is a single row, 8 connector female housing. Wires from the connector will be soldered onto the main board.

Keypad specifications continued
block two sensors
There are three sensors in the system. These sensors are what trigger the alarm. Carbon monoxide, water level, and door / window opening sensors are used to keep the user informed of unfavorable circumstances. The production model will have will have the capability of using more than three sensors. Only three are used in this case to keep the prototype recourses to a minimum.Block Two - Sensors
gas sensor
Chances are likely that the proposed idea of a carbon monoxide sensor will not be used due to availability. The replacement sensor is yet to be determined. Gas Sensor

Carbon Monoxide Sensor

12 VoltSupply

Single

Digital

Out

Single

Line

Analog Output

Ground

Logic

gas sensor specifications
Gas sensor specifications
  • Market – Maximum product cost of $40, $45 maximum prototype cost.
  • Power – 12V dc, delivered from the power supply to the sensor. Minimum operating voltage is estimated to be 10V, maximum is estimated to be 14V. Power is supplied to the sensor through a Molex connector. Power for the logic following the sensor will be 5V dc. Maximum of 6V, minimum of 4V.
gas sensor specifications continued
Mechanical – Maximum product volume is six cubic inches, shipping volume is ten cubic inches. Maximum product mass is 0.25 pounds. Sensor has four parts, all of them are unique. The maximum shock force is 100G, 5 impacts. Product will be wrapped in a plastic bag for moisture protection.

Environmental - Operating temperature range is -10 to 55 Celsius. Storage temperature ranges from -30 to 85 Celsius. Product does not provide a humidity range for storage or operation.

Safety – UL 2034 (Standard for Single and Multiple Station Carbon Monoxide Alarms), UL 634 (Standard for Connectors and Switches for Use with Burglar-Alarm Systems)

Manufacturing – Total parts count of five, all unique parts. Parts cost is estimated at $38, assembly cost of $2.

Life cycle – Estimated production lifetime of five years. Product has a field or factory service recommendation due to calibration. Product life of 2-3 years. Product will be disposed in accordance to local laws and regulations.

Gas sensor specifications continued
gas sensor specifications continued1
Gas sensor specifications continued
  • Performance requirements – The sensor’s input will be a port into open air.
  • Operation modes – Sensor has two modes, on and off. Sensor has two functional modes, “contaminated air”, and “clean air”.
  • Electrical interfaces – Sensor produces an analog output. Voltage level is monitored by a yet to be determined logic circuit.
  • Mechanical interfaces – This sensor requires three contacts. Therefore a 3 position female connector is used to link it to the system.
water sensor specifications
Market – Maximum production cost is $10, maximum prototype cost is $15.

Power - 12V dc, delivered from the power supply. Minimum operating voltage is estimated to be 4V, maximum is estimated to be 14V.

Mechanical - Maximum product volume is six cubic inches, shipping volume is ten cubic inches. Maximum product mass is 0.25 pounds. Sensor has four parts, all of them are unique. The maximum shock force is 100G, 10+ impacts. Moisture resistance packaging is not needed.

Environmental – Operating and storage temperature is form -30 to 80 Celsius. Product will operate in all humidity.

Safety –UL 634 (Standard for Connectors and Switches for Use with Burglar-Alarm Systems)

Manufacturing - 8 parts maximum, 6 parts are unique. Maximum parts cost is $7, with a $2 assembly and test cost.

Water sensor specifications
water sensor specifications continued
Water sensor specifications continued
  • Life cycle – Estimated Maximum production lifetime of 15 years. Replacement only, no service. Product life of 10 years. Product will be disposed in accordance to local laws and regulations
  • Operation modes – Sensor has two modes on, and off. The functional modes are “water present”, and “no water present”.
  • Electrical Interfaces – When water is detected, the sensor will send a 5V dc signal to the system.
  • Mechanical interfaces – This sensor requires two contacts. Therefore a 2 position female connector is used to link it to the system.
water sensor
Water Sensor

Single

Digital

Output

Sensing Element

12 Volt Supply

Logic

Dc output

door window sensor
Door / Window sensor
  • Market – Maximum production cost is $8, maximum prototype cost is $15.
  • Power - 12V dc, delivered from the power supply. Minimum operating voltage is estimated to be 4V, maximum is estimated to be 14V.
  • Mechanical - Maximum product volume is 1 cubic inch, shipping volume is 1.2 cubic inches. Maximum product mass is 0.1 pounds. Sensor has 3 parts. The maximum shock force is 100G, 10+ impacts. Product will be wrapped in a plastic bag for resistance to humidity.
  • Environmental – Operating and storage temperature is form -30 to 65 Celsius. Humidity operation rating is unknown.
  • Safety – UL 634 (Standard for Connectors and Switches for Use with Burglar-Alarm Systems), UL 498 (Standard for Attachment Plugs and Receptacles),
  • Manufacturing - 2 parts maximum, both parts are unique. Maximum parts cost is $7, with a $1 assembly and test cost.
door window sensor continued
Door / Window sensor continued
  • Life cycle – Estimated Maximum production lifetime of 15 years. Replacement only, no service. Product life of 10 years. Product will be disposed in accordance to local laws and regulations
  • Performance requirements – Momentary pushbutton switch used to sense entry.
  • Operation modes - Sensor has two modes, on and off. Sensor has two functional modes, “closed window / door”, and “open window / door”.
  • Electrical interfaces - Powered pushbutton will return 12V dc to the microprocessor in the event of intrusion.
door window sensor1
Door / Window sensor

5 Volts DC

Sensing Element

DC Output

door window sensor continued1
Door / Window sensor continued
  • Mechanical interfaces – The sensor will be mounted near the pane of a window or door. There will need to be a small angled bracket attached to the window or door to make precise contact with the switch only when the door/ window is closed. The switch itself will need to be mounted to the pane by a separate right angle bracket. This sensor requires two contacts. Therefore a 2 position female connector is used to link it to the system.
door window sensor illustrated
Door / Window sensor illustrated
  • Installation example for a door – Required hardware is one angled bracket and one flathead wood screw. Shown below are both an “open door” and a “closed door” situation.