{"id":3682,"date":"2023-10-21T06:11:30","date_gmt":"2023-10-21T13:11:30","guid":{"rendered":"https:\/\/www.donluc.com\/?p=3682"},"modified":"2023-10-21T06:11:30","modified_gmt":"2023-10-21T13:11:30","slug":"project-28-sensors-alcohol-gas-sensor-mq-3-mk05","status":"publish","type":"post","link":"https:\/\/www.donluc.com\/?p=3682","title":{"rendered":"Project #28 &#8211; Sensors &#8211; Alcohol Gas Sensor MQ-3 &#8211; Mk05"},"content":{"rendered":"<div style=\"width: 720px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-3682-1\" width=\"720\" height=\"480\" preload=\"metadata\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06W.mp4?_=1\" \/><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06W.mp4\">https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06W.mp4<\/a><\/video><\/div>\n<p>&#8212;&#8212;<\/p>\n<p>#DonLucElectronics #DonLuc #Sensors #AlcoholGasSensor #MinIMU9 #Pololu #Adafruit #SparkFun #Arduino #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant<\/p>\n<p>&#8212;&#8212;<\/p>\n<p><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06a.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06a.png\" alt=\"Alcohol Gas Sensor MQ-3\" width=\"720\" height=\"606\" class=\"alignnone size-full wp-image-3684\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06a.png 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06a-300x253.png 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>&#8212;&#8212;<\/p>\n<p><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06b.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06b.png\" alt=\"Alcohol Gas Sensor MQ-3\" width=\"720\" height=\"480\" class=\"alignnone size-full wp-image-3685\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06b.png 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06b-300x200.png 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>&#8212;&#8212;<\/p>\n<p><a href=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06c.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06c.png\" alt=\"Alcohol Gas Sensor MQ-3\" width=\"720\" height=\"480\" class=\"alignnone size-full wp-image-3686\" srcset=\"https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06c.png 720w, https:\/\/www.donluc.com\/wp-content\/uploads\/2023\/10\/DL2308Mk06c-300x200.png 300w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><\/a><\/p>\n<p>&#8212;&#8212;<\/p>\n<p><strong>Pololu Carrier for MQ Gas Sensors<\/strong><\/p>\n<p>This carrier board is designed to work with any of the MQ-series gas sensors, simplifying the interface from 6 to 3 pins\u2014ground, power and analog voltage output\u2014that are broken out with a 0.1&#8243; spacing, making the board compatible with 0.1&#8243; headers and standard breadboards and perfboards. This board has two mounting holes and provides convenient pads for mounting the gas sensor\u2019s required sensitivity-setting resistor.<\/p>\n<p><strong>Alcohol Gas Sensor &#8211; MQ-3<\/strong><\/p>\n<p>This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration.<\/p>\n<p>How does this relate to the breath? It turns out that there is a standard conversion from breath alcohol content to BAC that is employed by commercial breathalyzers. Our formula for calculating BAC from the alcohol measured in the breath is:<\/p>\n<p>% BAC = Breath mg\/L * 0.21<\/p>\n<p><strong>DL2308Mk06<\/strong><\/p>\n<p>1 x Adafruit METRO M0 Express<br \/>\n1 x DS3231 Precision RTC FeatherWing<br \/>\n1 x Pololu MinIMU-9 v5 Gyro, Accelerometer, and Compass<br \/>\n1 x Pololu Carrier for MQ Gas Sensors<br \/>\n1 x Alcohol Gas Sensor &#8211; MQ-3<br \/>\n1 x ProtoScrewShield<br \/>\n1 x Rocker Switch &#8211; SPST<br \/>\n2 x Resistor 10K Ohm<br \/>\n1 x CR1220 3V Lithium Coin Cell Battery<br \/>\n1 x SparkFun Cerberus USB Cable<\/p>\n<p><strong>Adafruit METRO M0 Express<\/strong><\/p>\n<p>LED &#8211; LED_BUILTIN<br \/>\nSDA &#8211; Digital 20<br \/>\nSCL &#8211; Digital 21<br \/>\nSW1 &#8211; Digital 2<br \/>\nMQ3 &#8211; Analog 0<br \/>\nVIN &#8211; +3.3V<br \/>\nVIN &#8211; +5V<br \/>\nGND &#8211; GND<\/p>\n<p>&#8212;&#8212;<\/p>\n<p><strong>DL2308Mk06p.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/****** Don Luc Electronics \u00a9 ******\r\nSoftware Version Information\r\nProject #28 - Sensors - Alcohol Gas Sensor MQ-3 - Mk05\r\n28-05\r\nDL2308Mk06p.ino\r\n1 x Adafruit METRO M0 Express\r\n1 x DS3231 Precision RTC FeatherWing\r\n1 x Pololu MinIMU-9 v5 Gyro, Accelerometer, and Compass\r\n1 x Pololu Carrier for MQ Gas Sensors\r\n1 x Alcohol Gas Sensor - MQ-3\r\n1 x ProtoScrewShield\r\n1 x Rocker Switch - SPST\r\n2 x Resistor 10K Ohm\r\n1 x CR1220 3V Lithium Coin Cell Battery\r\n1 x SparkFun Cerberus USB Cable\r\n*\/\r\n\r\n\/\/ Include the Library Code\r\n\/\/ DS3231 Precision RTC \r\n#include &lt;RTClib.h&gt;\r\n\/\/ Two Wire Interface (TWI\/I2C)\r\n#include &lt;Wire.h&gt;\r\n\/\/ Keyboard\r\n#include &lt;Keyboard.h&gt;\r\n\/\/ Includes and variables for IMU integration\r\n\/\/ STMicroelectronics LSM6DS33 Gyroscope and Accelerometer\r\n#include &lt;LSM6.h&gt;\r\n\/\/ STMicroelectronics LIS3MDL Magnetometer\r\n#include &lt;LIS3MDL.h&gt;\r\n\r\n\/\/ Keyboard\r\nString sKeyboard = &quot;&quot;;\r\n\r\n\/\/ DS3231 Precision RTC \r\nRTC_DS3231 rtc;\r\nString dateRTC = &quot;&quot;;\r\nString timeRTC = &quot;&quot;;\r\n\r\n\/\/ Pololu 9DoF IMU\r\n\/\/ STMicroelectronics LSM6DS33 Gyroscope and Accelerometer\r\nLSM6 imu;\r\n\/\/ Accelerometer and Gyroscopes\r\n\/\/ Accelerometer\r\nint imuAX;\r\nint imuAY;\r\nint imuAZ;\r\n\/\/ Gyroscopes \r\nint imuGX;\r\nint imuGY;\r\nint imuGZ;\r\n\/\/ STMicroelectronics LIS3MDL Magnetometer\r\nLIS3MDL mag;\r\n\/\/ Magnetometer\r\nint magX;\r\nint magY;\r\nint magZ;\r\n\r\n\/\/ Gas Sensors MQ\r\n\/\/ Alcohol Gas Sensor - MQ-3\r\nint iMQ3 = A0;\r\nint iMQ3Raw = 0;\r\nint iMQ3ppm = 0;\r\n\r\n\/\/ The number of the button pin\r\nint iButton = 2;\r\n\/\/ Variable for reading the button status\r\nint buttonState = 0;\r\n\r\n\/\/ Software Version Information\r\nString sver = &quot;28-05&quot;;\r\n\r\nvoid loop() {\r\n\r\n  \/\/ Date and Time RTC\r\n  isRTC ();\r\n\r\n  \/\/ Pololu Accelerometer and Gyroscopes\r\n  isIMU();\r\n\r\n  \/\/ Pololu Magnetometer\r\n  isMag();\r\n\r\n  \/\/ Gas Sensors MQ\r\n  isGasSensor();\r\n\r\n  \/\/ Read the state of the button value:\r\n  buttonState = digitalRead(iButton);\r\n\r\n  \/\/ Check if the button is pressed. If it is, the buttonState is HIGH:\r\n  if (buttonState == HIGH) {\r\n\r\n     Keyboard.println(sKeyboard);\r\n    \r\n  }\r\n\r\n  \/\/ Delay 1 Second\r\n  delay(1000);\r\n\r\n}\r\n<\/pre>\n<p><strong>getAccelGyro.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ Accelerometer and Gyroscopes\r\n\/\/ Setup IMU\r\nvoid setupIMU() {\r\n\r\n  \/\/ Setup IMU\r\n  imu.init();\r\n  \/\/ Default\r\n  imu.enableDefault();\r\n  \r\n}\r\n\/\/ Accelerometer and Gyroscopes\r\nvoid isIMU() {\r\n\r\n  \/\/ Accelerometer and Gyroscopes\r\n  imu.read();\r\n  \/\/ Accelerometer x, y, z\r\n  imuAX = imu.a.x;\r\n  imuAY = imu.a.y;\r\n  imuAZ = imu.a.z;\r\n  \/\/ Gyroscopes x, y, z\r\n  imuGX = imu.g.x;\r\n  imuGY = imu.g.y;\r\n  imuGZ = imu.g.z;\r\n\r\n  sKeyboard = sKeyboard + String(imuAX) + &quot;|&quot; + String(imuAY) + &quot;|&quot; + String(imuAZ) + &quot;|&quot;;\r\n  sKeyboard = sKeyboard + String(imuGX) + &quot;|&quot; + String(imuGY) + &quot;|&quot; + String(imuGZ) + &quot;|&quot;;\r\n  \r\n}\r\n<\/pre>\n<p><strong>getGasSensorMQ.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ Gas Sensors MQ\r\n\/\/ Gas Sensor\r\nvoid isGasSensor() {\r\n\r\n  \/\/ Read in analog value from each gas sensors\r\n  \/\/ Alcohol Gas Sensor - MQ-3\r\n  iMQ3ppm = isMQ3( iMQ3Raw );\r\n\r\n  sKeyboard = sKeyboard + String(iMQ3ppm) + &quot;|*&quot;;\r\n\r\n}\r\n\/\/ Alcohol Gas Sensor - MQ-3\r\nint isMQ3(double rawValue) {\r\n\r\n  double RvRo = rawValue;\r\n  \/\/ % BAC = breath mg\/L * 0.21\r\n  double bac = RvRo * 0.21;\r\n  return bac;\r\n  \r\n}\r\n<\/pre>\n<p><strong>getIMUMagnetometer.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ IMU Magnetometer\r\n\/\/ Setup Magnetometer\r\nvoid setupMag() {\r\n\r\n  \/\/ Setup Magnetometer\r\n  mag.init();\r\n  \/\/ Default\r\n  mag.enableDefault();\r\n  \r\n}\r\n\/\/ Magnetometer\r\nvoid isMag() {\r\n\r\n  \/\/ Magnetometer\r\n  mag.read();\r\n  \/\/ Magnetometer x, y, z\r\n  magX = mag.m.x;\r\n  magY = mag.m.y;\r\n  magZ = mag.m.z;\r\n\r\n  sKeyboard = sKeyboard + String(magX) + &quot;|&quot; + String(magY) + &quot;|&quot; \r\n  + String(magZ) + &quot;|&quot;;\r\n  \r\n}\r\n<\/pre>\n<p><strong>getRTC.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ Date &amp; Time\r\n\/\/ DS3231 Precision RTC\r\nvoid setupRTC() {\r\n\r\n  \/\/ DS3231 Precision RTC\r\n  if (! rtc.begin()) {\r\n    \/\/Serial.println(&quot;Couldn&#039;t find RTC&quot;);\r\n    \/\/Serial.flush();\r\n    while (1) delay(10);\r\n  }\r\n\r\n  if (rtc.lostPower()) {\r\n    \/\/Serial.println(&quot;RTC lost power, let&#039;s set the time!&quot;);\r\n    \/\/ When time needs to be set on a new device, or after a power loss, the\r\n    \/\/ following line sets the RTC to the date &amp; time this sketch was compiled\r\n    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));\r\n    \/\/ This line sets the RTC with an explicit date &amp; time, for example to set\r\n    \/\/ January 21, 2014 at 3am you would call:\r\n    \/\/rtc.adjust(DateTime(2023, 8, 10, 11, 0, 0));\r\n  }\r\n  \r\n}\r\n\/\/ Date and Time RTC\r\nvoid isRTC () {\r\n\r\n  \/\/ Date and Time\r\n  dateRTC = &quot;&quot;;\r\n  timeRTC = &quot;&quot;;\r\n  DateTime now = rtc.now();\r\n  \r\n  \/\/ Date\r\n  dateRTC = now.year(), DEC; \r\n  dateRTC = dateRTC + &quot;\/&quot;;\r\n  dateRTC = dateRTC + now.month(), DEC;\r\n  dateRTC = dateRTC + &quot;\/&quot;;\r\n  dateRTC = dateRTC + now.day(), DEC;\r\n\r\n  \/\/ Time\r\n  timeRTC = now.hour(), DEC;\r\n  timeRTC = timeRTC + &quot;:&quot;;\r\n  timeRTC = timeRTC + now.minute(), DEC;\r\n  timeRTC = timeRTC + &quot;:&quot;;\r\n  timeRTC = timeRTC + now.second(), DEC;\r\n\r\n  sKeyboard = &quot;SEN|&quot; + sver + &quot;|&quot; + String(dateRTC) + &quot;|&quot; + \r\n  String(timeRTC) + &quot;|&quot;;\r\n  \r\n}\r\n<\/pre>\n<p><strong>setup.ino<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"arduino\" data-enlighter-title=\"\">\r\n\/\/ Setup\r\nvoid setup()\r\n{\r\n  \r\n  \/\/ Give display time to power on\r\n  delay(100);\r\n  \r\n  \/\/ Wire - Inialize I2C Hardware\r\n  Wire.begin();\r\n\r\n  \/\/ Give display time to power on\r\n  delay(100);\r\n\r\n  \/\/ Date &amp; Time RTC\r\n  \/\/ DS3231 Precision RTC \r\n  setupRTC();\r\n  \r\n  \/\/ Initialize control over the keyboard:\r\n  Keyboard.begin();\r\n\r\n  \/\/ Pololu Setup IMU\r\n  setupIMU();\r\n\r\n  \/\/ Pololu Setup Magnetometer\r\n  setupMag();\r\n\r\n  \/\/ Initialize the button pin as an input\r\n  pinMode(iButton, INPUT);\r\n\r\n  \/\/ Initialize digital pin LED_BUILTIN as an output\r\n  pinMode(LED_BUILTIN, OUTPUT);\r\n  \/\/ Turn the LED on HIGH\r\n  digitalWrite(LED_BUILTIN, HIGH);\r\n\r\n  \/\/ Delay 5 Second\r\n  delay( 5000 );\r\n\r\n}\r\n<\/pre>\n<p>&#8212;&#8212;<\/p>\n<p><strong>People can contact us:<\/strong> https:\/\/www.donluc.com\/?page_id=1927<\/p>\n<p><strong>Technology Experience<\/strong><\/p>\n<ul>\n<li>Programming Language<\/li>\n<li>Single-Board Microcontrollers (PIC, Arduino, Raspberry Pi,Espressif, etc&#8230;)<\/li>\n<li>IoT<\/li>\n<li>Wireless (Radio Frequency, Bluetooth, WiFi, Etc&#8230;)<\/li>\n<li>Robotics<\/li>\n<li>Camera and Video Capture Receiver Stationary, Wheel\/Tank and Underwater Vehicle<\/li>\n<li>Unmanned Vehicles Terrestrial and Marine<\/li>\n<li>Machine Learning<\/li>\n<li>RTOS<\/li>\n<li>Research &#038; Development (R &#038; D)<\/li>\n<\/ul>\n<p><strong>Instructor, E-Mentor, STEAM, and Arts-Based Training<\/strong><\/p>\n<ul>\n<li>Programming Language<\/li>\n<li>IoT<\/li>\n<li>PIC Microcontrollers<\/li>\n<li>Arduino<\/li>\n<li>Raspberry Pi<\/li>\n<li>Espressif<\/li>\n<li>Robotics<\/li>\n<\/ul>\n<p><strong>Follow Us<\/strong><\/p>\n<p><strong>Luc Paquin \u2013 Curriculum Vitae &#8211; 2023<\/strong><br \/>\nhttps:\/\/www.donluc.com\/luc\/<\/p>\n<p><strong>Web:<\/strong> https:\/\/www.donluc.com\/<br \/>\n<strong>Facebook:<\/strong> https:\/\/www.facebook.com\/neosteam.labs.9\/<br \/>\n<strong>YouTube:<\/strong> https:\/\/www.youtube.com\/@thesass2063<br \/>\n<strong>Twitter:<\/strong> https:\/\/twitter.com\/labs_steam<br \/>\n<strong>Pinterest:<\/strong> https:\/\/www.pinterest.com\/NeoSteamLabs\/<br \/>\n<strong>Instagram:<\/strong> https:\/\/www.instagram.com\/neosteamlabs\/<\/p>\n<p><strong>Don Luc<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8212;&#8212; #DonLucElectronics #DonLuc #Sensors #AlcoholGasSensor #MinIMU9 #Pololu #Adafruit #SparkFun #Arduino #Project #Fritzing #Programming #Electronics #Microcontrollers #Consultant &#8212;&#8212; &#8212;&#8212; &#8212;&#8212; &#8212;&#8212; Pololu Carrier for MQ Gas Sensors This carrier board is designed to work with any of the MQ-series gas sensors, simplifying the interface from 6 to 3 pins\u2014ground, power and analog voltage output\u2014that are broken &#8230; <a title=\"Project #28 &#8211; Sensors &#8211; Alcohol Gas Sensor MQ-3 &#8211; Mk05\" class=\"read-more\" href=\"https:\/\/www.donluc.com\/?p=3682\" aria-label=\"Read more about Project #28 &#8211; Sensors &#8211; Alcohol Gas Sensor MQ-3 &#8211; Mk05\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[294,47,50,49,38,59,5,46,287,58,10,43],"tags":[251,86,304,6,102,4,85,252,246,24,103,9,27,248,109,34,108],"class_list":["post-3682","post","type-post","status-publish","format-standard","hentry","category-sensors","category-adafruit","category-arduino","category-consultant","category-digitalelectronics","category-fritzing","category-microcontrollers","category-pololu","category-program","category-arduino-programming","category-projects","category-sparkfun","tag-accelerometer","tag-adafruit","tag-alcohol-gas-sensor-mq-3","tag-arduino","tag-components","tag-consultant","tag-fritzing","tag-gyroscope","tag-magnetometer","tag-microcontroller","tag-pololu","tag-programming","tag-projects-2","tag-sensors","tag-sparkfun","tag-video-blog","tag-vlog"],"_links":{"self":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/3682","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3682"}],"version-history":[{"count":1,"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/3682\/revisions"}],"predecessor-version":[{"id":3687,"href":"https:\/\/www.donluc.com\/index.php?rest_route=\/wp\/v2\/posts\/3682\/revisions\/3687"}],"wp:attachment":[{"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.donluc.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}