﻿{"id":2600,"date":"2015-12-07T21:33:42","date_gmt":"2015-12-07T20:33:42","guid":{"rendered":"https:\/\/dahoo.fr\/wordpress\/?p=2600"},"modified":"2016-08-22T12:56:52","modified_gmt":"2016-08-22T11:56:52","slug":"arduino-detecteur-de-gaz","status":"publish","type":"post","link":"https:\/\/dahoo.fr\/wordpress\/arduino-detecteur-de-gaz\/","title":{"rendered":"Arduino : D\u00e9tecteur de Gaz + buzzer"},"content":{"rendered":"<p style=\"text-align: justify;\">Dans ce chapitre sur l&rsquo;arduino nous verrons deux choses, le fonctionnement d&rsquo;un d\u00e9tecteur de Gaz (CO2, propane, butane, etc) et le buzzer.<\/p>\n<p><!--more--><\/p>\n<p>Le projet est disponible sur le <a href=\"https:\/\/hack.dahoo.fr\/sketch.php?id=2\">hackPoint ici<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a378ef6c30f9\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a378ef6c30f9\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/dahoo.fr\/wordpress\/arduino-detecteur-de-gaz\/#Le_materiel\" >Le mat\u00e9riel<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/dahoo.fr\/wordpress\/arduino-detecteur-de-gaz\/#Schema\" >Sch\u00e9ma :<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/dahoo.fr\/wordpress\/arduino-detecteur-de-gaz\/#Version_A_Le_detecteur_de_Gaz\" >Version A : Le d\u00e9tecteur de Gaz<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/dahoo.fr\/wordpress\/arduino-detecteur-de-gaz\/#Version_B_Le_detecteur_de_Gaz_le_buzzer\" >Version B : Le d\u00e9tecteur de Gaz + le buzzer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/dahoo.fr\/wordpress\/arduino-detecteur-de-gaz\/#Sommaire\" >Sommaire<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Le_materiel\"><\/span>Le mat\u00e9riel<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Vous trouverez la page <a href=\"https:\/\/hack.dahoo.fr\/sketch.php?id=2\" target=\"_blank\">ici<\/a> avec le mat\u00e9riel, pour cela il vous faut<\/p>\n<ul>\n<li>Un arduino (logique :p )<\/li>\n<li>Un d\u00e9tecteur de Gaz<\/li>\n<li>Un buzzer<\/li>\n<li>Une breadBoard<\/li>\n<li>Une r\u00e9sistance de 120Hom<\/li>\n<li>Environs 15 minutes<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Schema\"><\/span>Sch\u00e9ma :<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>On branche donc le +5 sur le VCC du sensor, le GND sur le GND et le A0 sur A0 du sensor<\/p>\n<h3><a href=\"https:\/\/dahoo.fr\/wordpress\/wp-content\/uploads\/2015\/12\/sensor-gas_bb.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-2608\" src=\"https:\/\/dahoo.fr\/wordpress\/wp-content\/uploads\/2015\/12\/sensor-gas_bb-1024x914.png\" alt=\"sensor gas_bb\" width=\"860\" height=\"768\" srcset=\"https:\/\/dahoo.fr\/wordpress\/wp-content\/uploads\/2015\/12\/sensor-gas_bb-1024x914.png 1024w, https:\/\/dahoo.fr\/wordpress\/wp-content\/uploads\/2015\/12\/sensor-gas_bb-300x268.png 300w, https:\/\/dahoo.fr\/wordpress\/wp-content\/uploads\/2015\/12\/sensor-gas_bb.png 1755w\" sizes=\"auto, (max-width: 860px) 100vw, 860px\" \/><\/a><\/h3>\n<h3><\/h3>\n<h3><span class=\"ez-toc-section\" id=\"Version_A_Le_detecteur_de_Gaz\"><\/span>Version A : Le d\u00e9tecteur de Gaz<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">Le d\u00e9tecteur de gaz s\u2019utilise avec une alimentation 5V, on peut le brancher directement sur l&rsquo;arduino. Ne vous inqui\u00e9tez pas, il y a 4 broches mais on en utilise seulement 3 (\u00e7a ma perturb\u00e9 aussi au d\u00e9but :p).<\/p>\n<p style=\"text-align: justify;\">Le code ci-dessus est assez simple.<\/p>\n<p>&nbsp;<\/p>\n<p>[highlighter]<\/p>\n<pre>const int gasSensor = 0;\r\n\r\nvoid setup()\r\n{\r\n   Serial.begin(9600);\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ sets the serial port to 9600\r\n}\r\n\r\nvoid loop()\r\n{\r\n   float voltage;\r\n   voltage = getVoltage(gasSensor);\r\n\r\n   Serial.println(voltage);\r\n\r\n   delay(500); \/\/ wait a bit between buzzes\r\n}\r\n\r\nfloat getVoltage(int pin)\r\n{\r\n    return (analogRead(pin) * 0.004882814);\r\n    \/\/ This equation converts the 0 to 1023 value that analogRead()\r\n    \/\/ returns, into a 0.0 to 5.0 value that is the true voltage\r\n    \/\/ being read at that pin.\r\n}\r\n\r\n<\/pre>\n<h3><\/h3>\n<p>On r\u00e9cup\u00e8re la tension que le capteur de gaz \u00e9met puis on l&rsquo;affiche sur dans la console avec le port s\u00e9rie (la qui est l&rsquo;USB).<\/p>\n<p>La fonction <strong>getVoltage <\/strong>permet de lire la tension sur le pin gasSensor qui est le 0.<\/p>\n<p>&nbsp;<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Version_B_Le_detecteur_de_Gaz_le_buzzer\"><\/span>Version B : Le d\u00e9tecteur de Gaz + le buzzer<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A quoi sert un d\u00e9tecteur s&rsquo;il ne peut vous avertir du danger ??!<\/p>\n<p>Le buzzer permet d\u2019\u00e9mettre un bruit suivant la fr\u00e9quence que l&rsquo;on lui passe. Il est existe deux types le passive et l&rsquo;actif.<\/p>\n<p>&nbsp;<\/p>\n<p>[highlighter]<\/p>\n<pre>const int gasSensor =0;\r\n\r\n\r\nvoid setup()\r\n{\r\n  Serial.begin(9600);   \/\/ sets the serial port to 9600\r\n  pinMode(4, OUTPUT);   \/\/ set a pin for buzzer output\r\n}\r\n\r\nvoid loop()\r\n{\r\n    float voltage;\r\n    voltage = getVoltage(gasSensor);\r\n  \r\n    Serial.println(voltage);\r\n\r\n    if( voltage &gt; 1 )\r\n      buzz(4, 2500, 500); \/\/ buzz the buzzer on pin 4 at 2500Hz for 1000 milliseconds\r\n    \r\n    delay(500); \/\/ wait a bit between buzzes\r\n}\r\n\r\n\r\nfloat getVoltage(int pin)\r\n{\r\n  return (analogRead(pin) * 0.004882814);\r\n  \/\/ This equation converts the 0 to 1023 value that analogRead()\r\n  \/\/ returns, into a 0.0 to 5.0 value that is the true voltage\r\n  \/\/ being read at that pin.\r\n}\r\n\r\n\r\nvoid buzz(int targetPin, long frequency, long length) {\r\n  long delayValue = 1000000\/frequency\/2; \/\/ calculate the delay value between transitions\r\n  \/\/\/\/ 1 second's worth of microseconds, divided by the frequency, then split in half since\r\n  \/\/\/\/ there are two phases to each cycle\r\n  long numCycles = frequency * length\/ 1000; \/\/ calculate the number of cycles for proper timing\r\n  \/\/\/\/ multiply frequency, which is really cycles per second, by the number of seconds to\r\n  \/\/\/\/ get the total number of cycles to produce\r\n  for (long i=0; i &lt; numCycles; i++){ \/\/ for the calculated length of time...\r\n      digitalWrite(targetPin,HIGH); \/\/ write the buzzer pin high to push out the diaphram\r\n      delayMicroseconds(delayValue); \/\/ wait for the calculated delay value\r\n      digitalWrite(targetPin,LOW); \/\/ write the buzzer pin low to pull back the diaphram\r\n      delayMicroseconds(delayValue); \/\/ wait againf or the calculated delay value\r\n    }\r\n}\r\n\r\n<\/pre>\n<p>&nbsp;<\/p>\n<p>Pour int\u00e9grer le buzzer, nous avons juste repris le code pr\u00e9c\u00e9dent et int\u00e9gr\u00e9s une nouvelle fonction buzz qui g\u00e9n\u00e8re le signal. Dans la fonction principale <strong>loop,\u00a0<\/strong> j&rsquo;ai rajouter un if qui permet de comparer si la tension d\u00e9passe 1V nous activons le buzzer.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Sommaire\"><\/span><span id=\"Sommaire\">Sommaire<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/dahoo.fr\/wordpress\/sommaire-projet-arduino\/\">Retour au sommaire\u00a0<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans ce chapitre sur l&rsquo;arduino nous verrons deux choses, le fonctionnement d&rsquo;un d\u00e9tecteur de Gaz (CO2, propane, butane, etc) et le buzzer.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","jetpack_post_was_ever_published":false},"categories":[80,41],"tags":[247,250,249,248,157],"class_list":["post-2600","post","type-post","status-publish","format-standard","hentry","category-arduino","category-tuto","tag-arduino","tag-co2","tag-detecteur","tag-gaz","tag-tuto"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - 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