{"id":6595,"date":"2021-09-01T03:36:03","date_gmt":"2021-09-01T03:36:03","guid":{"rendered":"https:\/\/rogerbit.com\/wprb\/?p=6595"},"modified":"2021-09-01T03:36:03","modified_gmt":"2021-09-01T03:36:03","slug":"gas-leak-detector-alarm-system-with-arduino-nano","status":"publish","type":"post","link":"https:\/\/rogerbit.com\/wprb\/2021\/09\/gas-leak-detector-alarm-system-with-arduino-nano\/","title":{"rendered":"Gas leak detector alarm system with arduino nano"},"content":{"rendered":"

<\/iframe><\/p>\n<hr \/>\n<p>In this tutorial we will see how to assemble a gas leak detector alarm system with arduino nano. We will see a list of the electronic components to be used, the assembly of the circuit, the source code, and finally we will test the operation of the system. This project is ideal for use in sources near our home, where there is gas, such as a kitchen, stove or thermotanque.<\/p>\n<hr \/>\n<p style=\"text-align: left;\">Maybe you can be interested in projects in arduino, pic, robotics, telecommunications, subscribe to\u00a0<a href=\"http:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1\">http:\/\/www.youtube.com\/user\/carlosvolt?sub_confirmation=1<\/a>\u00a0lots of videos with complete source code and diagrams<\/p>\n<p style=\"text-align: left;\"><div id=\"ubm-banners-rotation-n1\" data-interval=\"4000\" class=\"ubm_banners_rotation\" style=\"overflow: hidden; width: 200px; height: 150px;\"><div id=\"3_ubm_banner\" class=\"ubm_rotating_banner\"><a href=\"https:\/\/bit.ly\/3aXRDAu\" target=\"_blank\" rel=\"dofollow\"><img src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/useful_banner_manager_banners\/3-2-logo youtube.png\" width=\"100%\" height=\"100%\" alt=\"SUSCRIBETE A NUESTRO CANAL DE YOUTUBE, TUTORIALES GRATIS\" \/><\/a><\/div><\/div><\/p>\n<hr \/>\n<h4><strong>Electronic components<\/strong><\/h4>\n<p><strong>mq2 gas sensor<\/strong><\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/10\/mq2.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-5940\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/10\/mq2.jpg\" sizes=\"(max-width: 289px) 100vw, 289px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/10\/mq2.jpg 1000w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/10\/mq2-150x150.jpg 150w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/10\/mq2-300x300.jpg 300w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/10\/mq2-768x768.jpg 768w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/10\/mq2-600x600.jpg 600w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/10\/mq2-820x820.jpg 820w\" alt=\"\" width=\"289\" height=\"289\" \/><\/a><\/p>\n<p><strong>Pin-Out sensor de gas Mq-2<\/strong><\/p>\n<p><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2016\/03\/mq-2.png\" rel=\"attachment wp-att-850\"><img loading=\"lazy\" class=\"alignnone size-full wp-image-850\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2016\/03\/mq-2.png\" alt=\"mq-2\" width=\"237\" height=\"267\" \/><\/a><\/p>\n<p><strong>Datasheet sensor MQ-2<\/strong><\/p>\n<p>Download\u2013>\u00a0<a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2016\/03\/MQ-2.pdf\" rel=\"\">MQ-2<\/a><\/p>\n<p>Gas sensor (MQ2) is useful for gas leak detection (in home and industry). It can detect LPG, i-butane, methane, alcohol, hydrogen, smoke, etc. Based on its fast response time. measures can be taken as soon as possible. In addition, the sensitivity can be adjusted using a potentiometer (digital pin).<\/p>\n<p><strong>TECHNICAL SPECIFICATIONS<\/strong><\/p>\n<p>Operating Voltage: 5V DC<br \/>\nFast<br \/>\nresponse and high sensitivity Detection range: 300 to 10000<br \/>\nppm<br \/>\nCharacteristic gas: 1000ppm, Isobutane Sensing resistance:<br \/>\n1K\u03a9 50ppm Toluene at 20K\u03a9 in Response Time: \u2264 10s<br \/>\nRecovery time: \u2264 30s<br \/>\nWorking temperature: -20\u00b0C~+55\u00b0C<br \/>\nHumidity: \u2264 95% RH<br \/>\nAmbient oxygen content: 21%<br \/>\nConsumes less than 150mA at 5V.<\/p>\n<p><strong>APPLICATIONS<\/strong><\/p>\n<p>Gas<br \/>\nLeak Detector Industrial Gas Detector<\/p>\n<hr \/>\n<div class=\"page-sidebar widget\" id=\"donation_buttons\"><form action=\"https:\/\/www.paypal.com\/cgi-bin\/webscr\" method=\"post\" target=\"_blank\" ><input type=\"hidden\" name=\"business\" value=\"donacion@rogerbit.com\"><input type=\"hidden\" name=\"bn\" value=\"mbjtechnolabs_SP\"><input type=\"hidden\" name=\"cmd\" value=\"_donations\"><input type=\"hidden\" name=\"item_name\" value=\"Ayuda a RogerBit.com\"><input type=\"hidden\" name=\"item_number\" value=\"www.rogerbit.com\"><input type=\"hidden\" class=\"set_donation_button_amount\" name=\"amount\" value=\"1\"><table ><tbody><tr><td><label for=\"rogerBit necesita de tu ayuda para seguir existiendo :-)\">rogerBit necesita de tu ayuda para seguir existiendo :-)<\/label><\/td><\/tr><\/tbody><\/table><table ><tbody><tr><td><input style=\"margin-top:10px;\" type=\"image\" name=\"submit\" border=\"0\" src=\"https:\/\/www.paypal.com\/en_US\/i\/btn\/btn_donateCC_LG.gif\" alt=\"PayPal - The safer, easier way to pay online\"><\/td><\/tr><\/tbody><\/table><input type=\"hidden\" name=\"currency_code\" value=\"USD\"><input type=\"hidden\" name=\"notify_url\" value=\"https:\/\/rogerbit.com\/wprb\/?Donation_Button&action=ipn_handler\"><\/form><\/div>\n<hr \/>\n<div class=\"desCon\">\n<h4>Arduino nano<\/h4>\n<h4><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/03\/arduino-nano.jpg\"><img loading=\"lazy\" class=\"alignnone wp-image-6304\" src=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/03\/arduino-nano.jpg\" sizes=\"(max-width: 376px) 100vw, 376px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/03\/arduino-nano.jpg 800w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/03\/arduino-nano-300x300.jpg 300w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/03\/arduino-nano-150x150.jpg 150w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/03\/arduino-nano-768x768.jpg 768w\" alt=\"\" width=\"376\" height=\"376\" \/><\/a><\/h4>\n<p>The Arduino Nano is a small, complete and compatible board based on the ATmega328 (Arduino Nano 3.x). It has more or less the same functionality as the Arduino Duemilanove, but in a different package. It only lacks a DC power connector and works with a Mini-B USB cable instead of a standard one.<\/p>\n<div class=\"googlepublisherpluginad\"><ins class=\"adsbygoogle\" data-ad-format=\"auto\" data-ad-client=\"ca-pub-7015362231217796\" data-ad-slot=\"4055351676\" data-ad-channel=\"WordPressSinglePost\" data-adsbygoogle-status=\"done\" data-ad-status=\"filled\"><ins id=\"aswift_2_expand\" tabindex=\"0\" title=\"Advertisement\" aria-label=\"Advertisement\"><ins id=\"aswift_2_anchor\"><iframe loading=\"lazy\" width=\"803\" height=\"280\" id=\"aswift_2\" name=\"aswift_2\" sandbox=\"allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation\" frameborder=\"0\" src=\"https:\/\/googleads.g.doubleclick.net\/pagead\/ads?client=ca-pub-7015362231217796&output=html&h=280&slotname=4055351676&adk=2267958480&adf=1829040220&pi=t.ma~as.4055351676&w=803&fwrn=4&fwrnh=100&lmt=1630466944&rafmt=1&to=pso&tp=site_kit&psa=1&channel=WordPressSinglePost&format=803x280&url=https%3A%2F%2Frogerbit.com%2Fwprb%2F2021%2F08%2Fsistema-de-alarma-detector-de-fuga-de-gas-con-arduino-nano%2F&flash=0&fwr=0&rpe=1&resp_fmts=3&wgl=1&adsid=ChAI8Ka3iQYQyYLSsp-tmKAIEkgAFcfHgD61YaB6ZrFUxXvTNtZpyGMVZfI_AF4-8BfSljRvUWAofIiVGCZTt8m_iQX1430Nb2umwoXkmfGLGT20gRdsyMhEOn8&uach=WyJXaW5kb3dzIiwiMTAuMCIsIng4NiIsIiIsIjkyLjAuOTAyLjg0IixbXSxudWxsLG51bGwsbnVsbF0.&dt=1630466754718&bpp=58&bdt=6977&idt=1675&shv=r20210830&mjsv=m202108310101&ptt=9&saldr=aa&abxe=1&cookie=ID%3D0f685256e1dc55df-22f693603cb800a5%3AT%3D1603161978%3ART%3D1603161978%3AS%3DALNI_MbXG5_po_qOwUts4dhS9hiGNqnDcg&prev_fmts=0x0%2C803x280%2C1349x657%2C1005x90&nras=3&correlator=1928528494848&pv_ch=WordPressSinglePost%2B&frm=20&pv=1&ga_vid=1842647622.1618059606&ga_sid=1630466756&ga_hid=1083992502&ga_fc=0&u_tz=-180&u_his=2&u_java=0&u_h=768&u_w=1366&u_ah=728&u_aw=1366&u_cd=24&u_nplug=3&u_nmime=4&adx=93&ady=3634&biw=1349&bih=657&scr_x=0&scr_y=1084&eid=31062297&oid=3&psts=AGkb-H--gwjTT5yLjiB1JmU6WMIrk6C-7zbWQ-Dw8qCdi9-gHY2oORzP8oYXDgu0JIlep3ykJqILBactzBl9%2CAGkb-H8YEk_6H7o5HPSedOMxbeX38pZ3gSjbcBot5Q7PAgy2_hirZ18W2cOy98uRUp5jI61T37BxDZRtvPhto0W31945OrlU2i95i5ZPfF9e3kM&pvsid=3958165250178720&pem=478&wsm=1&eae=0&fc=1920&brdim=0%2C0%2C0%2C0%2C1366%2C0%2C1366%2C728%2C1366%2C657&vis=1&rsz=%7Co%7CeEbr%7C&abl=NS&pfx=0&fu=128&bc=31&ifi=3&uci=a!3&btvi=3&fsb=1&xpc=LTiguM8M5g&p=https%3A\/\/rogerbit.com&dtd=M\" marginwidth=\"0\" marginheight=\"0\" vspace=\"0\" hspace=\"0\" allowtransparency=\"true\" scrolling=\"no\" allowfullscreen=\"allowfullscreen\" allow=\"attribution-reporting\" data-google-container-id=\"a!3\" data-google-query-id=\"CJC_0djq3PICFRFWcgodMeoFYg\" data-load-complete=\"true\" data-mce-fragment=\"1\"><\/iframe><\/ins><\/ins><\/ins><\/div>\n<table>\n<tbody>\n<tr>\n<td>Microcontroller<\/td>\n<td>ATmega328<\/td>\n<\/tr>\n<tr>\n<td>Architecture<\/td>\n<td>AVR<\/td>\n<\/tr>\n<tr>\n<td>Operating voltage<\/td>\n<td>5 V<\/td>\n<\/tr>\n<tr>\n<td>Flash memory<\/td>\n<td>32 KB of which 2 KB uses the bootloader<\/td>\n<\/tr>\n<tr>\n<td>SRAM<\/td>\n<td>2 KB<\/td>\n<\/tr>\n<tr>\n<td>Clock speed<\/td>\n<td>16 MHz<\/td>\n<\/tr>\n<tr>\n<td>Analog IN pins<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>EEPROM<\/td>\n<td>1 KB<\/td>\n<\/tr>\n<tr>\n<td>DC current by I\/O pins<\/td>\n<td>40 mA (I\/O pins)<\/td>\n<\/tr>\n<tr>\n<td>Input voltage<\/td>\n<td>7-12 V<\/td>\n<\/tr>\n<tr>\n<td>Digital I\/O pins<\/td>\n<td>22 (6 of which are PWM)<\/td>\n<\/tr>\n<tr>\n<td>PWM output<\/td>\n<td>6<\/td>\n<\/tr>\n<tr>\n<td>Energy consumption<\/td>\n<td>19 mA<\/td>\n<\/tr>\n<tr>\n<td>PCB Size<\/td>\n<td>18 x 45 mm<\/td>\n<\/tr>\n<tr>\n<td>Weight<\/td>\n<td>7 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>Pin diagram<\/h4>\n<h4><a href=\"http:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO.png\"><img loading=\"lazy\" class=\"alignnone wp-image-6033 size-large\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-1024x1024.png\" sizes=\"(max-width: 1024px) 100vw, 1024px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-1024x1024.png 1024w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-150x150.png 150w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-300x300.png 300w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-768x768.png 768w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-600x600.png 600w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-820x820.png 820w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2020\/11\/Pinout-NANO-1320x1321.png 1320w\" alt=\"\" width=\"1024\" height=\"1024\" \/><\/a><\/h4>\n<hr \/>\n<h4>Six 5 mm LED diodes of different colors<\/h4>\n<h4><img loading=\"lazy\" class=\"alignnone wp-image-6568\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/Leds-5-mm.jpg\" sizes=\"(max-width: 411px) 100vw, 411px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/Leds-5-mm.jpg 800w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/Leds-5-mm-300x300.jpg 300w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/Leds-5-mm-150x150.jpg 150w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/Leds-5-mm-768x768.jpg 768w\" alt=\"\" width=\"411\" height=\"411\" \/><\/h4>\n<hr \/>\n<h4>Six resistors of 1 Kohm<\/h4>\n<h4><img loading=\"lazy\" class=\"alignnone wp-image-6569\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/1k.jpg\" sizes=\"(max-width: 256px) 100vw, 256px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/1k.jpg 550w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/1k-300x300.jpg 300w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/1k-150x150.jpg 150w\" alt=\"\" width=\"256\" height=\"256\" \/><\/h4>\n<hr \/>\n<h4>A 5-volt buzeer<\/h4>\n<h4><img loading=\"lazy\" class=\"alignnone wp-image-6570\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/buzzer.jpg\" sizes=\"(max-width: 274px) 100vw, 274px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/buzzer.jpg 500w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/buzzer-300x230.jpg 300w\" alt=\"\" width=\"274\" height=\"210\" \/><\/h4>\n<hr \/>\n<h4>Female pins (4 pins in total)<\/h4>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-6571\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pines-hembra.jpg\" sizes=\"(max-width: 255px) 100vw, 255px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pines-hembra.jpg 518w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pines-hembra-300x298.jpg 300w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pines-hembra-150x150.jpg 150w\" alt=\"\" width=\"255\" height=\"253\" \/><\/p>\n<hr \/>\n<h4>Male pins (In total 2)<\/h4>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-6572\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pines-macho.jpg\" sizes=\"(max-width: 318px) 100vw, 318px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pines-macho.jpg 500w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pines-macho-300x231.jpg 300w\" alt=\"\" width=\"318\" height=\"245\" \/><\/p>\n<hr \/>\n<h4>Socket for the arduino nano<\/h4>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-6573\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/zocalo.jpg\" sizes=\"(max-width: 320px) 100vw, 320px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/zocalo.jpg 700w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/zocalo-300x300.jpg 300w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/zocalo-150x150.jpg 150w\" alt=\"\" width=\"320\" height=\"320\" \/><\/p>\n<hr \/>\n<h4>PCB<\/h4>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-6577\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pcb.png\" sizes=\"(max-width: 322px) 100vw, 322px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pcb.png 322w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/pcb-209x300.png 209w\" alt=\"\" width=\"322\" height=\"463\" \/><\/p>\n<p>Download gerber file \u2013>\u00a0<a href=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/Gerber_MEDIDOR_DE_GAS_MQ-2.zip\">Gerber_MEDIDOR_DE_GAS_MQ-2<\/a><\/p>\n<p><strong>Circuit<\/strong><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-6579\" src=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/circuito.png\" sizes=\"(max-width: 334px) 100vw, 334px\" srcset=\"https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/circuito.png 334w, https:\/\/rogerbit.com\/wprb\/wp-content\/uploads\/2021\/08\/circuito-212x300.png 212w\" alt=\"\" width=\"334\" height=\"473\" \/><\/p>\n<hr \/>\n<h4>Source code<\/h4>\n<pre class=\"lang:default decode:true \" title=\"C\u00f3digo Fuente\">int sensorMQ2=0;\r\nvoid setup(){\r\nSerial.begin(9600);\/\/Configuraci\u00f3n de la velocidad del puerto serial de arduino a 9600\r\n\/\/Se configuraran los pines 2,3,4,5,6 y 7 como salidas \r\n\/\/Del pin 2 al 6 van conectados a diodos led con su respectiva resistencia\r\n pinMode(2, OUTPUT);\r\n pinMode(3, OUTPUT);\r\n pinMode(4, OUTPUT);\r\n pinMode(5, OUTPUT);\r\n pinMode(6, OUTPUT);\r\n \/\/Va conectado al Buzzer\r\n pinMode(7, OUTPUT);\r\n sensorMQ2=analogRead(A0);\/\/Se lee el valor de la entrada anal\u00f3gica A0 donde est\u00e1 conectado el sensor MQ2\r\nwhile(sensorMQ2>80){\r\n Serial.print(\"Esperando a que se estabilice el sensor MQ2 (valor menor a 80): \");\/\/Se imprime su valor por el terminal serial\r\n sensorMQ2=analogRead(A0);\/\/Se lee el valor de la entrada anal\u00f3gica A0\r\n Serial.println(sensorMQ2);\/\/Se imprime su valor por el terminal serial\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, HIGH);\r\n digitalWrite(5, HIGH);\r\n digitalWrite(6, HIGH);\r\n delay(500);\r\n digitalWrite(2, LOW);\r\n digitalWrite(3, LOW);\r\n digitalWrite(4, LOW);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n delay(500); \r\n }\r\n}\r\nvoid loop(){\r\nsensorMQ2=analogRead(A0);\/\/Se lee el valor de la entrada anal\u00f3gica A0\r\nSerial.print(\"Valor del sensor MQ2: \");\r\nSerial.println(sensorMQ2);\/\/Se imprime su valor por el terminal serial\r\n\/\/Se compara el valor de la variable sensorMQ2 si se cumple apagar\u00e1 todos los led\r\nif(sensorMQ2<79){\r\n digitalWrite(2, LOW);\r\n digitalWrite(3, LOW);\r\n digitalWrite(4, LOW);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensorMQ2 si se cumple encender\u00e1 el led en el pin 2\r\nif(sensorMQ2>80){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, LOW);\r\n digitalWrite(4, LOW);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensorMQ2 si se cumple encender\u00e1 el led en el pin 2 y 3\r\nif(sensorMQ2>120){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, LOW);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensorMQ2 si se cumple encender\u00e1 el led en el pin 2, 3 y 4\r\nif(sensorMQ2>160){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, HIGH);\r\n digitalWrite(5, LOW);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensorMQ2 si se cumple encender\u00e1 el led en el pin 2, 3, 4, y 5\r\nif(sensorMQ2>200){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, HIGH);\r\n digitalWrite(5, HIGH);\r\n digitalWrite(6, LOW);\r\n digitalWrite(7, LOW);\r\n\r\n }\r\n\/\/Se compara el valor de la variable sensorMQ2 si se cumple encender\u00e1 el led en el pin 2, 3 ,4 ,5, 6 y el buzzer\r\nif(sensorMQ2>240){\r\n digitalWrite(2, HIGH);\r\n digitalWrite(3, HIGH);\r\n digitalWrite(4, HIGH);\r\n digitalWrite(5, HIGH);\r\n digitalWrite(6, HIGH);\r\n digitalWrite(7, HIGH);\/\/Se actica el buzzer\r\n\r\n } \r\ndelay(100);\/\/peque\u00f1o retardo antes de comenzar de vuelta\r\n}<\/pre>\n<hr \/>\n<p><strong>RECOMMENDED VIDEO<\/strong><\/p>\n<p><iframe loading=\"lazy\" title=\"Dom\u00f3tica: Detector de gas con llamador telef\u00f3nico mq-2\" width=\"1160\" height=\"653\" src=\"https:\/\/www.youtube.com\/embed\/i--o19Eqd1Y?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial we will see how to assemble a gas leak detector alarm system with arduino nano. We will see a list of the electronic components to be used, the assembly of the circuit, the source code, and finally we will test the operation of the system. This project is ideal for use in […]<\/p>\n","protected":false},"author":1,"featured_media":6575,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[648],"tags":[45,1261,181,1100,950,595,1071,1070,1069,966,1262,1008,514,568,1250,1252,613,1068,1066,917,969,31,986,1114,687],"_links":{"self":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/6595"}],"collection":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/comments?post=6595"}],"version-history":[{"count":1,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/6595\/revisions"}],"predecessor-version":[{"id":6596,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/posts\/6595\/revisions\/6596"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/media\/6575"}],"wp:attachment":[{"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/media?parent=6595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/categories?post=6595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rogerbit.com\/wprb\/wp-json\/wp\/v2\/tags?post=6595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}