SMART Notebook 10 User manual

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TABLE OF CONTENTS
This device is intended to measure alcohol in human breath. Measurements obtained by this device are
used in the diagnosis of alcohol intoxication.
User Manual
Introduction............................................................2
Dose-specific Effects of Alcohol.............................. 3
Specifications...........................................................4
Components Diagram.............................................5
Operation..................................................................6
Verification and Calibration......................................7
Precautions................................................................8
Technical Note
Description of Design Components……………………….9
Testing…………………………………………………………………………. 17

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INTRODUCTION
The Smart Breathalyzer 1.0 is an advanced version of alcohol screening device, used for the
detection of alcohol in the breath and to get analytical reports. The Smart breathalyzer 1.0
provides a digital result, displaying an estimate of the subject’s BAC (Blood Alcohol Content).
Before you begin testing, it is very important to read the entire owner’s manual. This device will
automatically calibrate to temperature and humidity of the environment every time you switch
on the device.
Alcohol and its effects on the human body When a person consumes alcohol, the alcohol is
absorbed from the mouth, throat, stomach and intestines into the bloodstream. The alcohol in
the bloodstream exchanges with air deep in the lungs. The percent of alcohol in a person’s
blood (BAC) is proportional to the percent of alcohol in a person’s breath (BrAC). The Smart
breathalyzer 1.0 measures a subject’s deep lung air alcohol level and converts it to the
estimated BAC. “BAC” means Blood Alcohol Concentration. It is measured in %.
How does alcohol affect my body?
Alcohol is a depressant. It has a relaxing effect on the muscles in your body. The muscles of
your eyes relax and lose focus. Your eyesight will become fuzzy and you may experience double
vision. Brain activity is slowed. Your judgment, reflexes, and coordination are all negatively
affected. Some vision impairments that occur when you have been drinking include:
• Narrowing of your field of vision
• Reduction in your depth perception
• Decreased ability to see in darkness
• Increased sensitivity to glare and a longer time for your eyes to readjust from the glare
Some mental (brain) impairment can occur when you have been drinking, including:
• Reduced awareness of danger
• Becoming overly confident and reckless
• Difficulty in making decisions
• 􀃊Reduction in balance
• Slowed reflexes
• Impaired judgment
Variations among individuals and other factors, such as altitude and air temperature, affect the
degree of intoxication. Some individuals may become intoxicated at low BAC levels. A low BAC
on a breath alcohol tester does not mean that a person’s reaction times can respond to any
emergency encountered. Individuals should not drink alcohol and drive or use any machinery
after consuming alcohol.

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Dose-specific Effects of Alcohol
BAC (% by
vol.)
Behavior
Impairment
0.001–0.029
Average individual appears
normal
Subtle effects that can be detected with
special tests
0.030–0.059
Mild euphoria
Relaxation
Joyousness
Talkativeness
Decreased inhibition
Concentration
0.060–0.099
Blunted feelings
Reduced sensitivity to pain
Euphoria
Disinhibition
Extraversion
Reasoning
Depth perception
Peripheral vision
Glare recovery
0.100–0.199
Over-expression
Boisterousness
Possibility of nausea and
vomiting
Reflexes
Reaction time
Gross motor control
Staggering
Slurred speech
Temporary erectile dysfunction
0.200–0.299
Nausea
Vomiting
Emotional swings
Anger or sadness
Partial loss of understanding
Impaired sensations
Decreased libido
Severe motor impairment
Loss of consciousness
Memory blackout
0.300–0.399
Stupor
Central nervous system
depression
Loss of understanding
Lapses in and out of
consciousness
Low possibility of death
Bladder function
Breathing
Dysequilibrium
Heart rate
0.400–0.500
Severe central nervous system
depression
Coma
Possibility of death
Breathing
Heart rate
Positional alcohol nystagmus
>0.50
High possibility of death

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Specifications
Dimensions
5.5 x 4.0 x 2.5 inches
Weight
200g
Sensor Technology
MQ3 Alcohol sensor
Detection Range
0.00 –0.09 B.A.C
Warm Up Time
60-80 seconds
Operating Temperature
25-34 °C
Maximum Operating Time
30 minutes

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Components Diagram
Display
Push button
Keypad
Switches
Mouth piece plug-in

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Operation
STEP 1 : To on the device switch on both the switches.
STEP 2 : There are two menus called calibrate and start breathalyzer. You can change options
using F2 and F3 buttons in the keypad respectively. Calibration menu is for company use only.
You cannot change it. So to take readings you have to press F2 to start the breathalyzer function.
STEP 3 : Wait until display shoes “press the push button”. After that you can take readings by
pressing the push button.
STEP 4 : Insert a mouthpiece into the Mouthpiece slot.
STEP 5 : Press the push button and give the device to take the breath sample
STEP 6 : Press the push button and give the device to take the breath sample
STEP 7 : Enter the license number and vehicle number when asked using keypad(Note that
backspace is the F4 key in the keypad)

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Calibration
The Smart Breathalyzer 1.0 is calibrated during manufacture using test results and
mathematical formulas. Known alcohol concentrations are passed through the sensor to set
baseline values for testing. During testing, the unit compares users’ breath samples to these
baseline values.
The accuracy of breath alcohol testers can fluctuate after six to twelve months of normal use,
depending on the number of tests performed and operating conditions. It is because the
alcohol sensor used in the device will not function well. If this product is providing inconsistent
test results, is not providing any test results, or provides unusually high or low test results, the
Sensor should be replaced and calibrate by the company.
The product should be recalibrated at least every six to twelve months depending on frequency
of use and operating conditions.
During recalibration, the company will reset the sensor baseline values and also perform a full
diagnostic check to ensure the accuracy and reliability of the product.

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Precautions
1. Do not blow smoke, food, or liquids into the Smart Breathalyzer 1.0 as this will damage the
sensor.
2. Do not test in areas with strong winds, smoke, or in an area where a large amount of alcohol
is being consumed.
3. Charge the device when you see battery low indication.
4. Send your tester in for periodic calibration service as required.
5. The Smart Breathalyzer 1.0 is designed to be used in a temperature range of (20-36)°C.
7. Avoid testing in the presence of any substances that contain methyl alcohol, isopropyl
alcohol or acetone. These substances may interfere with the results of the test.
8. For Hygiene reasons, use a new mouthpiece for each test subject.
9. You cannot use the results of this product in court. You have to send the person who caught
drunk to do a blood test.
10. Do not use the Smart Breathalyzer 1.0 as a tool to determine whether you should operate a
motor vehicle or equipment, or perform any other dangerous act.
10. Do not drink and drive. Always have a designated driver when alcohol is being consumed.
Requirements for the Test Subject
Before sampling, the test subject should breathe normally and calmly. The test subject must be
able to provide the required minimum respiratory level. For this purpose, the breathing flow
must be constant for a certain minimum blowing period. When the deep lung air comes out the
breath rate will be in a constant range. That will be the minimum blowing period.

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Description of Design Components
MQ3 Gas Sensor
The MQ3 gas sensor is alcohol sensor which is used to detect the alcohol concentration on your
breath. This sensor provides an analog resistive output based on alcohol concentration. When
the alcohol gas exist, the sensor’s conductivity gets higher along with the gas concentration
rising. It is suitable for various applications of detecting alcohol at different concentration. It is
widely used in domestic alcohol gas alarm, industrial alcohol gas alarm and portable alcohol
detector.
Features
High sensitivity to alcohol and small sensitivity to Benzine
Stable and long life
Fast response and High sensitivity
Only supported for Arduino Platform
Hardware Overview
This is an Analog output sensor. This needs to be connected to any one Analog socket
in Arduino (A0).
The output voltage from the Gas sensor increases when the concentration of gas increases.
Sensitivity can be adjusted by varying the potentiometer. The best preheat time for the sensor
is above 24 hours.
Connection to Arduino
Arduino
Sensor
Figure - MQ3 Gas Sensor

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Technical Overview
As shown in Figure 4 Temperature and humidity can affect gas sensor reading considerably.
Therefore we’re going to use Temperature-Humidity Sensor for the calibration of the device to
be used in any environmental condition.

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GSM Module
GSM module is used to transfer data from Smart Breathalyzer to the remote server via GPRS.
The model we are using is SIM808 GSM module. SIM808 module is a GSM and GPS two-in-one
function module. It is based on the latest GSM/GPS module SIM808 from SIMCOM, supports
GSM/GPRS Quad-Band network and combines GPS technology for satellite navigation.
Features
Supports multiple frequencies (Quad-band 850/900/1800/1900MHz)
GPRS multi-slot class12 connectivity: max. 85.6kbps (down-load/up-load)
Supports charging control for Li-Ion battery
Supports Real Time Clock
Supply voltage range 3.4V ~ 4.4V
Supports 3.0V to 5.0V logic level
Low power consumption, 1mA in sleep mode
Supports GPS NMEA protocol
Standard SIM Card
Operating Temperature range -400C ~ 900C
Figure SIM808 GSM/GPRS Module

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ATMEGA 2560
The Arduino Mega 2560 is a microcontroller board based on the ATmega2560. It has
54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog
inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection,
a power jack, an ICSP header, and a reset button.
We previously used Atmega 328 MCU. But due to insufficient flash memory we
jumped to an Arduino Mega board.
Technical Overview
Operating Voltage
5V
Input Voltage (recommended)
7-12V
Input Voltage (limit)
6-20V
Digital I/O Pins
54 (of which 15 provide PWM output)
Analog Input Pins
16
DC Current per I/O Pin
20 mA
DC Current for 3.3V Pin
50 mA
Flash Memory
256 KB of which 8 KB used by bootloader
SRAM
8 KB
EEPROM
4 KB
Clock Speed
16 MHz
LED_BUILTIN
13
Length
101.52 mm
Width
53.3 mm
Figure Arduino Mega 2560

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KEYPAD
A 4X4 keypad is used to enter Vehicle number, Driver license ID to be sent to the remote
database. This keypad is embedded to the device and it is used to controlling the Breathalyzer
too.
Hardware Overview
Connecting Keypad to LCD display
Connect the ground and Vcc pins of the LCD to the Arduino, then connect the LCD’s SDA and SCL
pins to 20, 21 respectively on Arduino mega.

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Design of Smart Breathalyzer
Following diagrams are the design images of the device. Device was printed using a 3D Printer
and top and bottom was sealed with two Perspex sheets.
Figure - Design by Solid Works
Figure –Actual Device After Printing

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Web and Network Application Design
A GSM module connected at each end is used to communicate between the device and the
remote server.
GPRS is used to transfer data packets from the end node to the remote server via the Internet.
TCP is used as Transport Layer protocols and IP is used as Network Layer Protocol.
Back end
The following technologies are used to develop the back end web application
1) Node.js with Express
Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine. Node.js
uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.
In our Web App only CPU intensive computation is the decrypting part.
Therefore we thought of using Node.js with Express. Advantage with using Node.js is its
fast than PHP backend programs and we are using JSON storage Object DB MongoDB so
that we can take out the whole process with Javascript.
2) Heroku free Web Hosting Service
Heroku installation is very easy. There is a free tier just to be sufficient for
hosting our web app and test. In case if we want to scale our project easily. For instance
we can add AWS on Heroku with just a click. No expertise is needed to work with.
3) MongoDB - Database

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Test results obtained from MQ3 alcohol sensor
Weight(kg)
Percentage(%)
Amount of
alcohol(ml)
Time after
ingestion(min)
Rs/R0
BAC
percentage(%)
52
8.8
330
20
1.44
0.05
52
8.8
330
40
1.44
0.05
52
8.8
330
60
1.16
0.04
52
8.8
330
180
4.27
0.01
72
40
180
40
1
0.09
72
40
180
60
1
0.09
72
40
180
100
1.06
0.08
90
40
133
40
1.15
0.07
90
40
133
60
1.28
0.06
90
40
133
180
2.04
0.03
90
40
133
240
2.68
0.02
Any
-
-
-
0.00
Callibaration of MQ3 gas sensor using test results
Figure –
VARIATION OF BAC AND BrAC WITH TIME (Mins)

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VARIATION OF BAC WITH Rs/Ro (Sensor Value)
Rs/R0
BAC percentage(%)
1.44
0.05
1.44
0.05
1.16
0.04
4.27
0.01
1
0.09
1
0.09
1.06
0.08
1.15
0.07
1.28
0.06
2.04
0.03
2.68
0.02
y = 0.0811x-1.435
0
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
BAC percentage(%)
F
i
g
u
r
e
–

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VARIATION OF log(BAC) WITH log(Rs/Ro)
Rs/R0
ln(Rs/R0)
BAC percentage(%)
ln(BAC)
1.44
0.364643
0.05
-2.99573
1.44
0.364643
0.05
-2.99573
1.16
0.14842
0.04
-3.21888
4.27
1.451614
0.01
-4.60517
1
0
0.09
-2.40795
1
0
0.09
-2.40795
1.06
0.058269
0.08
-2.52573
1.15
0.139762
0.07
-2.65926
1.28
0.24686
0.06
-2.81341
2.04
0.71295
0.03
-3.50656
2.68
0.985817
0.02
-3.91202
This equation will give accurate results for BAC % for two decimal places.
y = -1.4354x - 2.5116
-5
-4.5
-4
-3.5
-3
-2.5
-2
-1.5
-1
-0.5
0
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
ln(BAC)

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Testing of server