{"id":153,"date":"2021-07-11T18:56:34","date_gmt":"2021-07-11T18:56:34","guid":{"rendered":"http:\/\/imported-97"},"modified":"2021-07-11T18:56:34","modified_gmt":"2021-07-11T18:56:34","slug":"e-pur-si-muove-segnalatore-di-presenza","status":"publish","type":"post","link":"http:\/\/130.110.14.181\/index.php\/2021\/07\/11\/e-pur-si-muove-segnalatore-di-presenza\/","title":{"rendered":"E pur si muove: segnalatore di presenza"},"content":{"rendered":"<p lang=\"it-IT\"><span style=\"font-family: times new roman, times; font-size: 12pt;\">Si vuol creare un circuito che, con l\u2019aiuto di un <strong>sensore di rilevamento di movimento a raggi infrarossi<\/strong> (<strong>PIR<\/strong> acronimo di<em><strong> P<\/strong>assive <strong>I<\/strong>nfra<strong>R<\/strong>ed<\/em>) provochi l\u2019azione da noi desiderata, come l\u2019accensione di un led, l\u2019attivazione di un allarme sonoro&#8230;<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span class=\"rl_code\">{tab=Sensore passivo a infrarossi}<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 14pt;\"><strong><span style=\"font-family: courier new, courier;\">Sensore passivo a infrarossi<\/span><\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-family: courier new, courier; font-size: 12pt;\"><span lang=\"it-IT\">&nbsp;&nbsp; Tutti gli oggetti emettono radiazioni; il pi\u00f9 delle volte <\/span><span lang=\"it-IT\">la<\/span><span lang=\"it-IT\"> frequenza <\/span><span lang=\"it-IT\">di <\/span><span lang=\"it-IT\">queste radiazioni <\/span><span lang=\"it-IT\">sono <\/span><span lang=\"it-IT\">al di sotto<\/span><span lang=\"it-IT\"> dello spettro visibile <\/span><span lang=\"it-IT\">e perci\u00f2 non percepibili<\/span><span lang=\"it-IT\"> <\/span><span lang=\"it-IT\">d<\/span><span lang=\"it-IT\">all&#8217;<\/span><a href=\"https:\/\/it.wikipedia.org\/wiki\/Occhio\"><span lang=\"it-IT\">occhio umano<\/span><\/a><span lang=\"it-IT\">, ma possono essere rilevate <\/span><span lang=\"it-IT\">da<\/span><span lang=\"it-IT\"> specifici dispositivi elettronici <\/span><span lang=\"it-IT\">come appunto i PIR<\/span><span lang=\"it-IT\">.<br \/> <\/span><span lang=\"it-IT\">I PIR,<\/span><span lang=\"it-IT\"> <\/span><span lang=\"it-IT\">avendo una rilevazione ad infrarossi, si attivano nel momento in cui<\/span><span lang=\"it-IT\"> si verifica un<\/span><span lang=\"it-IT\"> cambio di temperatura all&#8217;interno dell&#8217;ambiente monitora<\/span><span lang=\"it-IT\">t<\/span><span lang=\"it-IT\">o, <\/span><span lang=\"it-IT\">come ad esempio l\u2019ingresso di una persona; <\/span><span lang=\"it-IT\">ecco perch\u00e9 <\/span><span lang=\"it-IT\">possono trovare<\/span><span lang=\"it-IT\"> applicazione <\/span><span lang=\"it-IT\">nei sistemi di antifurto ed antintruzione<\/span><span lang=\"it-IT\"> <br \/> <\/span><span lang=\"it-IT\">Va<\/span><span lang=\"it-IT\"> segn<\/span><span lang=\"it-IT\">alato per\u00f2 che <\/span><span lang=\"it-IT\">q<\/span><span lang=\"it-IT\">uesti tipi di sensori <\/span><span lang=\"it-IT\">possono<\/span><span lang=\"it-IT\"> <\/span><span lang=\"it-IT\">provocare<\/span><span lang=\"it-IT\"> fals<\/span><span lang=\"it-IT\">e attivazioni.<\/span><\/span><\/p>\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">Il termine passivo trova giustificazione nel fatto che i PIR non emettono energia, ma lavorano rilevando l&#8217;energia emessa da persone, animali ed oggetti.<\/span><\/p>\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\"><img decoding=\"async\" src=\"\/images\/Arduino\/e-pur-si-muove\/Segnalatore_di_presenza_html_f1c9ff1059e2189f.png\" alt=\"Segnalatore di presenza html f1c9ff1059e2189f\" style=\"margin-right: 50px; margin-left: 20px; float: left;\" \/>&nbsp;&nbsp; Il modulo HC-SR501 rappresentato in figura \u00e8 quello che utilizzeremo; esso \u00e8 costituito da un sensore in grado di rilevare le radiazioni infrarosse e da un circuito che memorizza l\u2019intensit\u00e0 della radiazione rilevata e quando riscontra una variazione nell\u2019intensit\u00e0 della radiazione attuale emette un segnale elettrico interpretabile da Arduino. <\/span><br \/><span style=\"font-family: courier new, courier; font-size: 12pt;\"> Nel modulo notiamo in basso due resistenze variabili (trimmer): quella posta a sinistra consente di regolare il tempo di azione (3-200 s), l\u2019altro la dimensione del raggio di azione (sensibilit\u00e0, 3-7 m); la rotazione in senso orario ne aumenta i rispettivi valori.<\/span><\/p>\n<p><span class=\"rl_code\">{tab=Il Progetto}<\/span><\/p>\n<p>&nbsp;<\/p>\n<p lang=\"it-IT\"><span style=\"font-size: 14pt;\"><strong><span style=\"font-family: courier new, courier;\">Segnalare una presenza mediante i LED<\/span><\/strong><\/span><\/p>\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">&nbsp;&nbsp; Costruiamo un progetto che accenda un LED rosso se viene rilevato un movimento, uno verde in caso contrario.<\/span><\/p>\n<h3>&nbsp;<\/h3>\n<h3 lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">&nbsp;&nbsp;<strong><span style=\"font-size: 14pt;\"> Componenti<\/span><\/strong><\/span><\/h3>\n<ul>\n<li lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">2 LED: rosso, verde<\/span><\/li>\n<li lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">2 resistenze da 220 \u03a9<\/span><\/li>\n<li lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">Sensore PIR<\/span><\/li>\n<li lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">Connettori jumper<\/span><\/li>\n<\/ul>\n<h3>&nbsp;<\/h3>\n<h3 lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">&nbsp;&nbsp; <span style=\"font-size: 14pt;\"><strong>Collegamenti<\/strong><\/span><\/span><\/h3>\n<p>&nbsp;<\/p>\n<p style=\"text-align: left;\"><img loading=\"lazy\" decoding=\"async\" src=\"\/images\/Arduino\/e-pur-si-muove\/Segnalatore_di_presenza_html_474822c7e2e04895.png\" alt=\"Segnalatore di presenza html 474822c7e2e04895\" width=\"160\" height=\"157\" style=\"margin-left: 200px; margin-right: 50px; float: left;\" \/><\/p>\n<dl>\n<dd>\n<table cellspacing=\"0\" cellpadding=\"4\">\n<tbody>\n<tr style=\"text-align: center;\" valign=\"top\">\n<td style=\"width: 47px;\">\n<p lang=\"it-IT\"><strong><span style=\"font-family: courier new, courier; font-size: 12pt;\">PIR<\/span><\/strong><\/p>\n<\/td>\n<td style=\"width: 62px;\">\n<p lang=\"it-IT\"><strong><span style=\"font-family: courier new, courier; font-size: 12pt;\">Arduino<\/span><\/strong><\/p>\n<\/td>\n<\/tr>\n<tr style=\"text-align: center;\" valign=\"top\">\n<td style=\"width: 47px;\">\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">Vcc<\/span><\/p>\n<\/td>\n<td style=\"width: 62px;\">\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">5 V<\/span><\/p>\n<\/td>\n<\/tr>\n<tr style=\"text-align: center;\" valign=\"top\">\n<td style=\"width: 47px;\">\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">OUT<\/span><\/p>\n<\/td>\n<td style=\"width: 62px;\">\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">D3<\/span><\/p>\n<\/td>\n<\/tr>\n<tr valign=\"top\">\n<td style=\"text-align: center; width: 47px;\">\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">GND<\/span><\/p>\n<\/td>\n<td style=\"width: 62px;\">\n<p lang=\"it-IT\" style=\"text-align: center;\"><span style=\"font-family: courier new, courier; font-size: 12pt;\">GND<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/dd>\n<\/dl>\n<p lang=\"it-IT\"><span style=\"font-family: courier new, courier; font-size: 12pt;\"><\/span><\/p>\n<h3 lang=\"it-IT\"><span style=\"font-size: 14pt;\"><strong><span style=\"font-family: courier new, courier;\">&nbsp;&nbsp; Assemblaggio<\/span><\/strong><\/span><\/h3>\n<p lang=\"it-IT\">&nbsp;<img decoding=\"async\" src=\"\/images\/Arduino\/e-pur-si-muove\/Segnalatore_di_presenza_html_4cb476441294c6cb.png\" alt=\"Segnalatore di presenza html 4cb476441294c6cb\" style=\"display: block; margin-left: auto; margin-right: auto;\" \/><\/p>\n<p><span class=\"rl_code\">{tab=Il codice}<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"font-size: 14pt;\"><strong><span style=\"font-family: courier new, courier;\">Il codice:<\/span><\/strong><\/span><\/p>\n<p>&nbsp;<\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">int durataCalibrazione = 30; <span style=\"font-size: 10pt;\">\/*tempo di calibrazione 10-60 secondi come indicato nella scheda tecnica *\/ <\/span><\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">int PIR = 3;<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">int ledVerde = 5;<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">int ledRosso = 6;<\/span><\/code><\/p>\n<p>&nbsp;<\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">void setup(){<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  pinMode( ledRosso, OUTPUT );<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  pinMode( ledVerde, OUTPUT );<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  pinMode(PIR, INPUT );<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  Serial.begin(9600);<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  Serial.print(\"calibrazione del sensore \");<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  for(int i = 0; i &lt; durataCalibrazione; i++){<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">    Serial.print(\".\");<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">    delay(1000);<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  }<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  Serial.println(\" fatto\"); \/\/ dopo un tempo di 30 s<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  Serial.println(\"Il sensore PIR ora \u00e8 attivo\");<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  delay(50);<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">}<\/span><\/code><\/p>\n<p>&nbsp;<\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">void loop(){<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  digitalWrite(ledRosso, digitalRead(PIR));<\/span><span style=\"font-size: 10pt;\">\/\/ Mantieni acceso il led rosso se c'\u00e8 movimento<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">  digitalWrite(ledVerde, !digitalRead(ledRosso));<\/span><span style=\"font-size: 10pt; font-family: courier new, courier;\">\/\/ Spegni il led verde se il Led rosso \u00e8 acceso e viceversa<\/span><\/code><\/p>\n<p lang=\"it-IT\"><code><span style=\"font-family: courier new, courier; font-size: 12pt;\">}<\/span><\/code><\/p>\n<div id=\"sdfootnote1\">\n<p><span style=\"font-family: courier new, courier; font-size: 12pt;\"><span lang=\"it-IT\"><code>{\/tabs}<\/code><\/span><\/span><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Si vuol creare un circuito che, con l\u2019aiuto di un sensore di rilevamento di movimento a raggi infrarossi (PIR acronimo di Passive InfraRed) provochi l\u2019azione da noi desiderata, come l\u2019accensione [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_EventAllDay":false,"_EventTimezone":"","_EventStartDate":"","_EventEndDate":"","_EventStartDateUTC":"","_EventEndDateUTC":"","_EventShowMap":false,"_EventShowMapLink":false,"_EventURL":"","_EventCost":"","_EventCostDescription":"","_EventCurrencySymbol":"","_EventCurrencyCode":"","_EventCurrencyPosition":"","_EventDateTimeSeparator":"","_EventTimeRangeSeparator":"","_EventOrganizerID":[],"_EventVenueID":[],"_OrganizerEmail":"","_OrganizerPhone":"","_OrganizerWebsite":"","_VenueAddress":"","_VenueCity":"","_VenueCountry":"","_VenueProvince":"","_VenueState":"","_VenueZip":"","_VenuePhone":"","_VenueURL":"","_VenueStateProvince":"","_VenueLat":"","_VenueLng":"","_VenueShowMap":false,"_VenueShowMapLink":false,"footnotes":""},"categories":[13],"tags":[],"class_list":["post-153","post","type-post","status-publish","format-standard","hentry","category-giochi-di-luce-con-arduino"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>E pur si muove: segnalatore di presenza - PugliaSOS2.0<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/130.110.14.181\/index.php\/2021\/07\/11\/e-pur-si-muove-segnalatore-di-presenza\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"E pur si muove: segnalatore di presenza - PugliaSOS2.0\" \/>\n<meta property=\"og:description\" content=\"Si vuol creare un circuito che, con l\u2019aiuto di un sensore di rilevamento di movimento a raggi infrarossi (PIR acronimo di Passive InfraRed) provochi l\u2019azione da noi desiderata, come l\u2019accensione [&hellip;]\" \/>\n<meta property=\"og:url\" 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