Group 1: Group 1: Château de NemoChâteau de NemoFinal PresentationFinal Presentation

April 27April 27thth, 2004, 2004

Ali ShareefNiraj Balwani

Jason LitJeh LimSin-Hoe Lim

Project Overview …Project Overview … Description:Description: Design and implement an automatic aquarium Design and implement an automatic aquarium controller that can monitor and modify aquarium controller that can monitor and modify aquarium environment.environment.

Functionality:Functionality:Device allows user to monitor and modify the following Device allows user to monitor and modify the following aquarium settings:aquarium settings:• pH LevelspH Levels• Temperature SettingsTemperature Settings• Feed ScheduleFeed Schedule• Light ScheduleLight Schedule

Project Overview …Project Overview …

MotivationMotivation1.1. Low maintenance of aquariums in public Low maintenance of aquariums in public

places (offices, clinics, malls, etc.).places (offices, clinics, malls, etc.).

2.2. Target market: Frequent travelers who need Target market: Frequent travelers who need to maintain their aquariums (accessible to maintain their aquariums (accessible through Internet) .through Internet) .

3.3. Current similar products in the market only Current similar products in the market only monitor tank settings, but require extensive monitor tank settings, but require extensive manual maintenance. manual maintenance.

Project Overview …Project Overview …

Project Success CriteriaProject Success Criteria Ability to simulate day/night light schedules Ability to simulate day/night light schedules

based on user input.based on user input. Ability to use automatic feeder to release Ability to use automatic feeder to release

food into aquarium at user specified times.food into aquarium at user specified times. Ability to heat the aquarium based on user Ability to heat the aquarium based on user

input.input. Ability to automatically control water levels Ability to automatically control water levels

and maintain desired pH levels.and maintain desired pH levels. Ability to access tank controller and monitor Ability to access tank controller and monitor

and modify settings both locally (through and modify settings both locally (through keypad) and remotely through the Internet.keypad) and remotely through the Internet.

Block Diagram …Block Diagram …

Rabbit 3000 Micro controllerRabbit 3000

Micro controller

HeaterHeater

Water Pump InWater Pump In

LightLight

WWWWWW

Ethernet Port

PC Running Linux Based Software and client.

Networking Module

pH SensorpH Sensor

Temp. SensorTemp. Sensor

H20 Level Sensors (3)H20 Level Sensors (3)

Sensor Module

Wall Wart (9 V)

Wall Wart (9 V)

9V–5V Regulator9V–5V Regulator

5V-3.3 V Regulator 5V-3.3 V Regulator

System Power Module

Perip

hera

l Pow

er M

odule

Auto-FeederAuto-FeederMotorMotor

Water Pump OutWater Pump Out

Output

RJ 45

RJ 4

5

Wire5V Supply

Asynchronous

Dallas 1-Wire

Infrared

Professional ComponentsProfessional Components

Constraint Analysis and Component Constraint Analysis and Component Selection RationaleSelection Rationale

Patent Liability AnalysisPatent Liability Analysis Reliability and Safety AnalysisReliability and Safety Analysis Ethical and Environmental Impact AnalysisEthical and Environmental Impact Analysis

Constraint Analysis & Constraint Analysis & Component SelectionComponent Selection

MicroprocessorMicroprocessor LCD / Keypad moduleLCD / Keypad module pH MeterpH Meter Temperature SensorTemperature Sensor Water Level SensorsWater Level Sensors Solid State RelaysSolid State Relays

Microprocessor Constraints Microprocessor Constraints ……

High number of I/O High number of I/O pinspins

Ability to Ability to communicate communicate through the internetthrough the internet

Significant amount Significant amount of SRAMof SRAM Server codeServer code

Real Time ClockReal Time ClockRabbit 3000 Core Module

Microprocessor Selection …Microprocessor Selection …

Final microprocessors used for major Final microprocessors used for major comparisonscomparisons Rabbit Semiconductors – RabbitCore Rabbit Semiconductors – RabbitCore

RCM 3000RCM 3000 Rabbit Semiconductors – RabbitCore Rabbit Semiconductors – RabbitCore

RCM 3200RCM 3200 Atmel - Atmel - ATmega8535LATmega8535L

Atmel …Atmel …

ATmega8535LATmega8535L 32 programmable I/O pins not 32 programmable I/O pins not

necessarily all useablenecessarily all useable Real time counter with separate Real time counter with separate

oscillatoroscillator 512k SRAM512k SRAM

Rabbits …Rabbits …

RabbitCore RCM 3200RabbitCore RCM 3200 52 digital I/O pins52 digital I/O pins

44 configurable44 configurable 4 fixed inputs4 fixed inputs 4 fixed outputs4 fixed outputs

Fully integrated 10/100 Base-T Ethernet Fully integrated 10/100 Base-T Ethernet connectivity connectivity

Internal Real Time ClockInternal Real Time Clock 512k SRAM512k SRAM

Rabbits …Rabbits …

RabbitCore RCM 3000RabbitCore RCM 3000 Little difference in specifications:Little difference in specifications:

RCM 3200 runs at 44.2 MHzRCM 3200 runs at 44.2 MHz RCM 3000 runs at 29.4 MHzRCM 3000 runs at 29.4 MHz

Price differencePrice difference RCM 3200 US$89.00 single quantitiesRCM 3200 US$89.00 single quantities RCM 3000 US$79.00 single quantitiesRCM 3000 US$79.00 single quantities

Final Microprocessor …Final Microprocessor …

Ultimate Choice – RabbitCore RCM 3000Ultimate Choice – RabbitCore RCM 3000 Price - $79.00Price - $79.00

LCD / Keypad Module …LCD / Keypad Module …

Generic 12 button Generic 12 button keypad + LCD display Vs. keypad + LCD display Vs. Rabbit LCD Rabbit LCD display/keypad moduledisplay/keypad module Rabbit LCD/keypad module Rabbit LCD/keypad module

is supported by RCM 3000is supported by RCM 3000 Generic 12 button keypad Generic 12 button keypad

requires extra interfacingrequires extra interfacing LCD display requires extra LCD display requires extra

interfacinginterfacing

Rabbit LCD display / keypad input

Component Selection (contd.) …Component Selection (contd.) … pH MeterpH Meter

Temperature SensorTemperature Sensor

Selection : HI-98103 pH meter from Hanna Instrument ($23.00)Reason: 1) pH range 0 ~ 14 pH, +/- 0.2 pH accuracy. 2) Replaceable anti-corrosion electrode (length, accuracy).

Selection : DS-18S20 from Dallas Semiconductor ($0.85)Reason: 1) 1-wire interface with micro controller.

2) Operating voltage from 3.0V ~ 5 V. 3) Temperature range -55’C ~ +125’C , 9 bit resolution.

Water Level SensorsWater Level SensorsSelection : IR Receiver/Transmitter PNZ323B ($2.10)Reason: 1) Day light Filter

2) Reasonable Price

Solid State RelaysSolid State Relays

Selection:Selection: Tyco Electronics - SSR-Tyco Electronics - SSR-

240D25240D25 Low “turn on” current Low “turn on” current

requirement (~50 mA)requirement (~50 mA) Low “turn on” voltage (3 – Low “turn on” voltage (3 –

32 V DC)32 V DC) Switch 25 Amps at 24 – Switch 25 Amps at 24 –

280 VAC280 VAC Price $25.00Price $25.00

Patent Liability AnalysisPatent Liability Analysis

Intellectual property rights need to be Intellectual property rights need to be respected.respected.

Similar product in the marketSimilar product in the market AquaController II, Neptune SystemsAquaController II, Neptune Systems

Monitors pH and temperature, can Simulates Monitors pH and temperature, can Simulates Daylight, allows internet access to aquariumDaylight, allows internet access to aquarium

Octopus 3000, Aquadyne Computer CorporationOctopus 3000, Aquadyne Computer Corporation Monitors pH and temperatureMonitors pH and temperature

Patents have been found yet for these Patents have been found yet for these productsproducts

Patent Liability AnalysisPatent Liability Analysis

““Fish pond methods and systems”Fish pond methods and systems” Patent 6,041,738, March 28, 2000Patent 6,041,738, March 28, 2000 Water is purified by passing water across a Water is purified by passing water across a

settling container and the waste is moved to a settling container and the waste is moved to a decomposition pond decomposition pond

AnalysisAnalysis No infringement No infringement Chateau Nemo removes waste water and Chateau Nemo removes waste water and

replaces with fresh waterreplaces with fresh water

Patent Liability AnalysisPatent Liability Analysis

““Fish feeding device”Fish feeding device” Patent 6,467,431, October 22, 2002Patent 6,467,431, October 22, 2002 Motor rotates at predetermined time or interval Motor rotates at predetermined time or interval

indicated by timerindicated by timer AnalysisAnalysis

Literal InfringementLiteral Infringement Chateau Nemo utilizes real time clock on the Chateau Nemo utilizes real time clock on the

microprocessor to rotate motormicroprocessor to rotate motor

Patent Liability AnalysisPatent Liability Analysis

Need to obtain patent or license for:Need to obtain patent or license for: ““Fish feeding device”, Patent 6,467,431Fish feeding device”, Patent 6,467,431

Patent under questionPatent under question ““Heater apparatus for an aquarium”, Patent Heater apparatus for an aquarium”, Patent

6,140, 6156,140, 615

Reliability & Safety AnalysisReliability & Safety Analysis

We believe that Reliability, safety and We believe that Reliability, safety and maintainability must be an integral part of maintainability must be an integral part of our design.our design.

With water near the system and fish lives With water near the system and fish lives depend on the system, reliability and depend on the system, reliability and safety will be user’s No.1 concern.safety will be user’s No.1 concern.

FMECA (failure mode, effect and criticality FMECA (failure mode, effect and criticality analysis) to analyze possible circuit fault.analysis) to analyze possible circuit fault.

Reliability & Safety AnalysisReliability & Safety Analysis

Reliability Models for component and Reliability Models for component and guideline from guideline from Military handbook for Military handbook for Reliability Prediction of Electronic Reliability Prediction of Electronic Equipment.Equipment.

Component most likely to fail :Component most likely to fail :

1) Linear regulator -- heat dissipations1) Linear regulator -- heat dissipations

2) Rabbit Core module -- complex circuit2) Rabbit Core module -- complex circuit

Reliability & Safety AnalysisReliability & Safety Analysis

The mean time to failure of the entire The mean time to failure of the entire system was found to be 43.99 years. system was found to be 43.99 years.

Ethical & Environmental Ethical & Environmental AnalysisAnalysis

(by Niraj Balwani)(by Niraj Balwani)

Ethical Impact AnalysisEthical Impact Analysis Operating Environment & TestingOperating Environment & Testing

1. Water1. Water

2. Temperature Variability 2. Temperature Variability

3. Robustness3. Robustness

4. Living Organisms4. Living Organisms Warnings – Device Unit and User ManualWarnings – Device Unit and User Manual

1. Risk of Electrical Shock1. Risk of Electrical Shock

2. Proper Disposal2. Proper Disposal

3. Do not dismantle3. Do not dismantle

Ethical & Environmental Ethical & Environmental AnalysisAnalysis

Environmental Impact AnalysisEnvironmental Impact Analysis Product Life-cycleProduct Life-cycle

1. Manufacture/Design1. Manufacture/Design

2. Packaging2. Packaging

3. Normal – Use3. Normal – Use

4. Recycling/Disposal4. Recycling/Disposal

Design ComponentsDesign Components

Packaging Design ConsiderationsPackaging Design Considerations Schematic Design ConsiderationsSchematic Design Considerations PCB Layout Design ConsiderationsPCB Layout Design Considerations Software Design ConsiderationsSoftware Design Considerations

Packaging Design Packaging Design ConsiderationsConsiderations

ConsiderationsConsiderations1.1. Ensure safety of fish (no electrical wiring inside the Ensure safety of fish (no electrical wiring inside the

tank).tank).

2.2. Water-resistant casing.Water-resistant casing.

3.3. Easy to use environment.Easy to use environment.

4.4. Aesthetic appearance.Aesthetic appearance.

Water Pumps pH Meter

Rabbit 3000 LCD/Keypad

Under-gravel

water filter

System Setup …System Setup …

Clean Clean

WaterWater

Input Water Input Water PumpPump OutputOutput

WaterWater

Pump Pump

(to Reservoir)(to Reservoir)

Housing for Housing for Sensors, feeder, Sensors, feeder,

HeaterHeater

Under gravel Under gravel Water filter kitWater filter kit

Water Level Water Level

SensorSensor

ControllerController

24.4”

12.4”

16.8”

LampLamp

ControlleController:r:

Device Device ControllerControllerFront View

8”

4”3.4”

3.1”

LCD display

LED bank

Keypad input

4”

Bottom View

8”

Ethernet Port

Sensor Connecter (Header)

Power Cord

0.6” 1.5” 2”

8”

3-D View

3”

4”

SensorSensors:s:

pH sensor & temperature pH sensor & temperature sensorsensor

Max Max

Water Water

LevelLevel

Temperaturesensor

3”

9”

pH meter

heater Auto feeder

9”

2.5”

DS18S20

8”

7”

1”

7”

SensorSensors:s: Water level sensorWater level sensor

Tube with floating cork

10”

1.5” diameter cork

Floating cork

0.5”

10”

IR Tx

10”

IR Rx

IR Tx

IR Rxfloating cork

Water level

0.5”0.5”

External Devices Power Module

Left Side

Fuse BoxLights

Heater

Pump Out

Pump In

Top Side

Width

13 Inches

4.5

8 Inches

Schematic Considerations Schematic Considerations ……

Interfacing

• Aquarium Sensors/Feeder

• Water Level Sensor – IR LED/IR Detectors

• pH Sensor – Reading from pH meter

• Temperature Sensor – Dallas 18S20

• Auto Feeder

• External Devices Power Supply

• Water Pump In and Water Pump Out

• Heater

• Lights

+ C910 u

R11P OT

5V

J22

RE S E T B UTTON

12

3.3V

/RE S E T_IN

R24.7 K

V B AT_E X T

J23

HE A DE R 2

12

5V

Q102N3904

PF7 -- 1 Wire interface to Dallas 18S20

3.3V

3.3V

J18HE A DE R 6

123456

J19

HE A DE R 6

123456

PG4 - Low Water Level

PG7 - Critical Water Level

9V

PG6 - Optimum Water Level

J2

HE A DE R 4

1234

3.3V

3.3V

P F7

9V

3.3V

J20

HE A DE R 12

123456789

101112

9V

3.3V

3.3V

R13P OT

R45

10 Ohm

5V

R16 4.7 K

Title

S ize Document Number Rev

Date: S heet of

<Doc> <RevCode>

Chateau de Nemo S chematic -- Complete Control Module

C

1 1Tuesday, A pril 27, 2004

R20 4.7 K

9V

W ater_P ump_In

W ater_P ump_Out

3.3V

P F1

P C2

P F0

U6

OCP -P CT4116/E -- Opto-Isolators

A N11

CA 12

A N23

CA 24

A N35

CA 36

A N47

CA 48

E M311CO312E M213CO214E M115CO116

E M49CO410P C0

R49 4.7 K

J11

HE A DE R 6

123456

R50 4.7 K

Light_Out_Conn

Light_Out

R1300 Ohm

Heater_Out

R3300 Ohm

R4300 Ohm

W ater_P ump_Out_ConnW ater_P ump_In_Conn

Heater_Out_Conn

R5300 Ohm

P C1

V B AT_E X T

P B 4

P C3

P C4

P C5

J4

CON34A -- In J1 -- Rabbit Core Module

1 23 45 67 89 10

11 1213 1415 161719212325 2627 2829 3031 3233 34

18202224

R6

300 Ohm

P F6P F4P B 6

P E 3P E 5

P G4P G6P E 0

S MOD1/IORD

P E 7

V RA M

/RE S

P B 2

P C7

Q62N3904

/RE S

P G1P G3

Q72N3904

P D5

J8

CON34A -- In J2 -- Rabbit Core Module

1 23 45 67 89 10

11 1213 1415 161719212325 2627 2829 3031 3233 34

18202224

P D3

A CT_OUTP D7

P B 2

Q82N3904

R8P OT

Q92N3904

R9P OT

P B 4

J9

HE A DE R 17X 2 -- Out J1 -- Debugging Rabbit

246810121416182022242628303234

13579

111315171921232527293133

R10P OT

J10

HE A DE R 17X 2 -- Out J2 -- Debugging Rabbit

246810121416182022242628303234

13579

111315171921232527293133

P C1

P B 6

P C3

P F4

P C7P C5

P D5P G3P G1

J30

CON4

1234

PA 7

A CT_OUTP D7P D3

PA 5

PA 6S tatus

PA 0PA 2PA 4

PA 3

P F6

P F0P F2

PA 1

P E 5

P E 0P E 3

PA 5PA 7

P G6

PA 1PA 3

P C0P F1P F3

P C6P C4P C2

P G2P G0

P D4

PA7, PA5, PA3, PA1 -- pH meter reading

J5

CONN P CB 7x2 -- J2 LCD/K eyboard

13579

2468

101214

1113

P D2P D6

P G4

V RA MS MOD1/IORD

S P D_OUT

PA 3PA 5PA 7

P F3PA 1

J6

CONN P CB 7x2 -- J3 LCD/K eyboard

13579

2468

101214

1113

P C0P F1

P C6P C4P C2

LNK _OUT

P G0

P E 7

S P D_OUT

LNK _OUT

5V

P D4P G2

5V

P B 0

P D6P D2

P B 5P B 3

P G6

P B 7

V B AT_E X T

P F5P F7

P B 5P B 3P B 0

P F5P B 7

P E 4P E 6P F7

P G5P G7P E 1

S M0D0/IOW R

P E 4P E 6

/RE S E T_IN

P E 1

S tatusPA 6

P G5

PA 4

P G7

PA 0

/IOW R

PA 2

P F2

S M0D0

P F0

/RE S E T_IN

+ C1.22 u

P G4

R39100 Ohm

W ater_P ump_Out_Conn

W ater_P ump_In

R40100 Ohm

W ater_P ump_In_Conn

Heater_Out

Heater_Out_Conn

P G5

R41100 Ohm

5V

Light_Out

R43100 Ohm

P E 7

3.3V

P B 0

Light_Out_Conn

P B 2

U17

MA X 688

BLI

M6

BA

SE

7

IN1

CC

8

GN

D4

/S HDN2

/P FO3

Out5

5V

P B 3P B 4

Q3T1P 42

+ C2.1 u

5V

C6220 uF

P B 5

C710 nF

P B 6

R42100 K

5V

P B 7

C8470 uF

P E 7

J12

CONN P CB 13x2 -- J1 LCD/K eyboard Interface

13579

1113151719212325

2468101214161820222426

P B 4P B 2

P B 6

P F4P F6

P E 4P E 1

P G7P E 6

P B 3P B 0P G5

P B 7P B 5

P F5P F7

P E 5P E 3P E 0

P E 7

R44

1K

P F7

P G7

P F6P F5P E 0

P F4

J21

HE A DE R 2

12

P E 3P E 1

P E 5P E 4P E 6

Q4

2N4403

P E 7P G7

W ater_P ump_Out

P F7

A uto-Feeder

A uto_Feeder_P ower

D2DIODE

P G6

P G7P G4

A uto-Feeder

U13

OCP -P CT4116/E -- OUTP UTS

A N11

CA 12

A N23

CA 24

A N35

CA 36

A N47

CA 48

E M311CO312E M213CO214E M115CO116

E M49CO410

Inputs to the Rabbit

A uto_Feeder_P owerR38 4.7 K

U15

LM7805

IN1

OUT2

5V

Control Module

Rabbit/LCD Interface

System Power Module

External Devices Power Interface

Aquarium Sensor Interface

PCB Layout Design PCB Layout Design ConsiderationsConsiderations

Packaging (shape and size):Packaging (shape and size):

1) all connectors at one side of PCB1) all connectors at one side of PCB

2) need space for various connector 2) need space for various connector

and wiring. and wiring. Component layout (orientation of Component layout (orientation of

component) :component) : 1) group by functionality 1) group by functionality

2) component clearance – heat sink, Rabbit Core2) component clearance – heat sink, Rabbit Core

PCB Layout Design PCB Layout Design ConsiderationsConsiderations

Routing (trace size, via, route):Routing (trace size, via, route): 1) Power trace (50 mil) vs signal trace (10 mil).1) Power trace (50 mil) vs signal trace (10 mil).

2) minimum via, shortest route, 45’ turning.2) minimum via, shortest route, 45’ turning. Other :Other :

Copper pour, bypass capacitor, useful Copper pour, bypass capacitor, useful

information on silk screen, space for circuit information on silk screen, space for circuit

amendment and PCB rework.amendment and PCB rework.

Software Design Software Design ConsiderationsConsiderations

MemoryMemory 512k SRAM available512k SRAM available

Initialization routinesInitialization routines Default pin directions (in/out)Default pin directions (in/out)

Data pin directionsData pin directions Mono-directional/Bi-directionalMono-directional/Bi-directional

Custom LCD/Keypad module functionsCustom LCD/Keypad module functions Simplicity of applicationSimplicity of application

PollingPolling Condition checksCondition checks

Software Flowchart …Software Flowchart …RESET

INITIALIZATION ROUTINE

CHECK CONDITIONS

Modifications?

SERVERClient Connection?

LOCAL SETUPKeypad input?

NO

NO

SERVER MODULE

Interact via client module.

LOCAL SETUP MODULEInteract via LCD display/keypad

NO

YES

YES

YESAssert pins as required to handle condition

DemonstrationDemonstration1.1. Ability to simulate day/night light Ability to simulate day/night light

schedules based on user input.schedules based on user input.

DemonstrationDemonstration

2.2. Ability to use automatic feeder to release Ability to use automatic feeder to release food into aquarium at user specified times.food into aquarium at user specified times.

DemonstrationDemonstration3.3. Ability to heat the aquarium based on user input.Ability to heat the aquarium based on user input.

DemonstrationDemonstration

4.4. Ability to automatically control water levels Ability to automatically control water levels and maintain desired pH levels.and maintain desired pH levels.

DemonstrationDemonstration

5.5. Ability to access tank controller and monitor Ability to access tank controller and monitor and modify settings both locally (through and modify settings both locally (through keypad) and remotely through the Internet.keypad) and remotely through the Internet.

Contributions & SummaryContributions & Summary

Niraj BalwaniNiraj Balwani- Networking Module/Micro Support/Website- Networking Module/Micro Support/Website- Casing, Documentation- Casing, Documentation

Ali ShareefAli Shareef- Peripheral Power Module/Network Support- Peripheral Power Module/Network Support- Schematics- Schematics

Jason Lit Jeh LimJason Lit Jeh Lim- Microcontroller/LCD/Keypad (Software)- Microcontroller/LCD/Keypad (Software)- Hardware Support- Hardware Support

Sin-Hoe LimSin-Hoe Lim- Sensor Module- Sensor Module- PCB Board/Wiring/Hardware Debugging- PCB Board/Wiring/Hardware Debugging

Questions and Comments …Questions and Comments …