{"id":9329,"date":"2023-05-06T17:08:40","date_gmt":"2023-05-06T15:08:40","guid":{"rendered":"https:\/\/deepbluembedded.com\/?p=9329"},"modified":"2023-08-17T23:50:07","modified_gmt":"2023-08-17T20:50:07","slug":"active-buzzer-vs-passive-buzzer","status":"publish","type":"post","link":"https:\/\/deepbluembedded.com\/active-buzzer-vs-passive-buzzer\/","title":{"rendered":"Active Buzzer vs Passive Buzzer"},"content":{"rendered":"\n<p class=\"has-text-align-justify\">In this article, we&#8217;ll compare <strong>Active Buzzer vs Passive Buzzer<\/strong> in terms of working principles and <a href=\"https:\/\/deepbluembedded.com\/arduino-active-passive-buzzer\/\">How to interface Active &amp; Passive With Arduino<\/a>. We&#8217;ll also highlight the <strong>Differences Between Active Buzzer and Passive Buzzer<\/strong> devices so you can choose whichever is more suitable for your project.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Piezo buzzers are a type of audio transducer that can be used to generate sound. They are a popular choice for simple sound effects, alarms, and tone-generation applications due to their small size, low cost, and ease of use. Here is an interactive tool that you can play with to experience what a buzzer sounds like!<\/p>\n\n\n\n<div style=\"display: flex; flex-direction: column; align-items: center;\">\n  <div style=\"display: flex; align-items: center; margin-bottom: 10px;\">\n    <label for=\"tone-slider\" style=\"width: 70px;\">Tone:<\/label>\n    <input type=\"range\" min=\"10\" max=\"14000\" value=\"1000\" class=\"slider\" id=\"tone-slider\" style=\"width: 200px;\">\n    <input type=\"text\" class=\"textfield\" id=\"tone-field\" value=\"1000 Hz\" style=\"width: 130px; margin-left: 10px;\">\n  <\/div>\n  <div style=\"display: flex; align-items: center; margin-bottom: 10px;\">\n    <label for=\"duration-slider\" style=\"width: 70px;\">Duration:<\/label>\n    <input type=\"range\" min=\"50\" max=\"5000\" value=\"500\" class=\"slider\" id=\"duration-slider\" style=\"width: 200px;\">\n    <input type=\"text\" class=\"textfield\" id=\"duration-field\" value=\"500 ms\" style=\"width: 130px; margin-left: 10px;\">\n  <\/div>\n  <div style=\"display: flex; align-items: center; margin-bottom: 10px;\">\n    <label for=\"volume-slider\" style=\"width: 70px;\">Volume:<\/label>\n    <input type=\"range\" min=\"0\" max=\"100\" value=\"50\" class=\"slider\" id=\"volume-slider\" style=\"width: 200px;\">\n    <input type=\"text\" class=\"textfield\" id=\"volume-field\" value=\"50%\" style=\"width: 130px; margin-left: 10px;\">\n  <\/div>\n  <button onclick=\"playBuzzer()\">Play Buzzer ????<\/button>\n<\/div>\n\n<script>\n  const volumeSlider = document.getElementById(\"volume-slider\");\n  const toneSlider = document.getElementById(\"tone-slider\");\n  const durationSlider = document.getElementById(\"duration-slider\");\n  const toneField = document.getElementById(\"tone-field\");\n  const durationField = document.getElementById(\"duration-field\");\n  const volumeField = document.getElementById(\"volume-field\");\n\n  volumeSlider.oninput = function() {\n    volumeField.value = volumeSlider.value;\n  }\n\n  toneSlider.oninput = function() {\n    toneField.value = toneSlider.value;\n  }\n\n  durationSlider.oninput = function() {\n    durationField.value = durationSlider.value;\n  }\n\n  function playBuzzer() {\n    \/\/ create a new AudioContext\n    const audioContext = new (window.AudioContext || window.webkitAudioContext)();\n\n    \/\/ create a gain node to control the volume\n    const gainNode = audioContext.createGain();\n    gainNode.gain.value = (volumeSlider.value)\/100;\n\n    \/\/ create an oscillator node to generate the sound wave\n    const oscillatorNode = audioContext.createOscillator();\n    oscillatorNode.type = 'sawtooth'; \/\/ set the waveform type\n    oscillatorNode.frequency.value = toneSlider.value; \/\/ set the frequency to 440 Hz (A4)\n\n    \/\/ connect the oscillator node to the gain node\n    oscillatorNode.connect(gainNode);\n\n    \/\/ connect the gain node to the audio context's destination (speakers)\n    gainNode.connect(audioContext.destination);\n\n    \/\/ start the oscillator\n    oscillatorNode.start();\n\n    \/\/ stop the oscillator after 0.5 seconds\n    setTimeout(() => {\n      oscillatorNode.stop();\n    }, durationSlider.value);\n  }\n<\/script>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-text-align-justify\">A piezo buzzer is a polarized electronic device which means it has a positive lead &amp; a negative lead. And it needs a voltage of 3.3v up to 12v to work, the working voltage is stated on the manufacturer page so make sure you get a 5v buzzer which is going to work just as fine with all microcontrollers.<\/p>\n\n\n\n<figure class=\"gb-block-image gb-block-image-5968a2b9\"><img loading=\"lazy\" decoding=\"async\" width=\"592\" height=\"281\" class=\"gb-image gb-image-5968a2b9\" src=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Arduino-Piezo-Buzzer.png\" alt=\"Arduino-Piezo-Buzzer\" title=\"Arduino-Piezo-Buzzer\" srcset=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Arduino-Piezo-Buzzer.png 592w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Arduino-Piezo-Buzzer-300x142.png 300w\" sizes=\"(max-width: 592px) 100vw, 592px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n<h2 class=\"gb-headline gb-headline-b68cb381 gb-headline-text\" id=\"piezo-buzzers-working-principles\"><strong>Piezo Buzzers Working Principles<\/strong><\/h2>\n\n\n<p class=\"has-text-align-justify\">Applying voltage to the piezo buzzer terminals will cause a slight deformation in the piezo disc and by changing this voltage the piezo disc will vibrate and produce the buzzer sound we all know. This is called a <strong>Passive Buzzer<\/strong>.<\/p>\n\n\n\n<p class=\"has-text-align-justify\">Another type of buzzer doesn&#8217;t need a varying voltage, you just give it constant voltage and it has an internal chopper (oscillator) circuit that turns the constant voltage to a square wave and feeds that to the piezo disc to generate a fixed-frequency tone. And that type is called <strong>Active Buzzer<\/strong>.<\/p>\n\n\n<h2 class=\"gb-headline gb-headline-42c7219b gb-headline-text\" id=\"active-buzzer\"><strong>Active Buzzer<\/strong><\/h2>\n\n\n<p><a href=\"https:\/\/amzn.to\/41am3Xi\" target=\"_blank\" rel=\"noreferrer noopener sponsored nofollow\">Active Buzzers<\/a> are the easiest to use, as they have internal oscillators. You only need to feed it with constant voltage and it&#8217;ll play a continuous buzzer tone until you drive it LOW. It acts like a digital output device (like an LED or something) that you either turn ON or OFF.<\/p>\n\n\n\n<p>The working voltage of an Active buzzer falls in the range of 3.3v up to 12v and you need to check the manufacturer data to know the exact working DC voltage for your buzzer. For example, a 6v buzzer will work with a DC voltage in the range (4v-8v).<\/p>\n\n\n\n<p>Keep in mind that buzzers are polarized electronic devices which means they have a positive lead &amp; a negative lead (like LEDs, capacitors, etc). So be careful when you&#8217;re hooking it up with a microcontroller or any drive circuit.<\/p>\n\n\n<h4 class=\"gb-headline gb-headline-99d32b19 gb-headline-text\" id=\"technical-specs-of-an-active-buzzer\">Technical Specs of an Active Buzzer<\/h4>\n\n\n<p>Those are the specs of an active buzzer (6v DC) as found in its datasheet.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>Rated Voltage<\/td><td>6V DC<\/td><\/tr><tr><td>Operating Voltage<\/td><td>4 to 8V DC<\/td><\/tr><tr><td>Rated Current<\/td><td>\u226430mA<\/td><\/tr><tr><td>Sound Output at 10cm<\/td><td>\u226585dB<\/td><\/tr><tr><td>Resonant Frequency<\/td><td>2,300 \u00b1300Hz<\/td><\/tr><tr><td>Tone<\/td><td>Continuous<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<h2 class=\"gb-headline gb-headline-c88c3119 gb-headline-text\" id=\"inside-an-active-buzzer\"><strong>Inside an Active Buzzer<\/strong><\/h2>\n\n\n<p>Let&#8217;s take a look inside an Active Buzzer to see how it&#8217;s made.<\/p>\n\n\n\n<figure class=\"gb-block-image gb-block-image-d6ad6114\"><img loading=\"lazy\" decoding=\"async\" width=\"1115\" height=\"955\" class=\"gb-image gb-image-d6ad6114\" src=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram1.jpg\" alt=\"Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram1\" title=\"Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram1\" srcset=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram1.jpg 1115w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram1-300x257.jpg 300w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram1-1024x877.jpg 1024w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram1-768x658.jpg 768w\" sizes=\"(max-width: 1115px) 100vw, 1115px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-text-align-justify\">Inside an active buzzer, you can find the piezoelectric disc, the oscillator driver PCB, and a backside casing of resin or plastic. Note that there is a hole in the top casing which allows the sound waves to travel through.<\/p>\n\n\n<h2 class=\"gb-headline gb-headline-596d8b4d gb-headline-text\" id=\"passive-buzzer\"><strong>Passive Buzzer<\/strong><\/h2>\n\n\n<p class=\"has-text-align-justify\"><a href=\"https:\/\/amzn.to\/3nAsLbw\" target=\"_blank\" rel=\"noreferrer noopener sponsored nofollow\">Passive Buzzers<\/a> on the other hand need an AC voltage signal in order to vibrate and make sound. Therefore, it&#8217;s a little bit harder to control compared to Active buzzers. But it also allows us to generate whatever note frequency we want to play. <\/p>\n\n\n\n<p class=\"has-text-align-justify\">Compared to the fixed tone that active buzzers generate, passive buzzers are more suitable for projects where you need to control the audio tone frequency. And it only needs a PWM signal that you can feed to the passive buzzer using a Timer555 circuit or an Arduino board.<\/p>\n\n\n<h4 class=\"gb-headline gb-headline-df690055 gb-headline-text\" id=\"technical-specs-of-a-passive-buzzer\">Technical Specs of a Passive Buzzer<\/h4>\n\n\n<p>Those are the specs of a passive buzzer as found in its datasheet.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Rated Voltage<\/strong><\/td><td>3 ~ 5 V<\/td><\/tr><tr><td><strong>Sound Output<\/strong>&nbsp;at 10cm with 2048Hz Square Wave<\/td><td>\u226585 dB<\/td><\/tr><tr><td><strong>Frequency Range<\/strong><\/td><td>50 ~ 14,000 Hz<\/td><\/tr><tr><td><strong>Resonant Frequency<\/strong><\/td><td>2,048 Hz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n<h2 class=\"gb-headline gb-headline-9bbbed80 gb-headline-text\" id=\"inside-a-passive-buzzer\"><strong>Inside a Passive Buzzer<\/strong><\/h2>\n\n\n<p>Let&#8217;s take a look inside a Passive Buzzer to see how it&#8217;s made.<\/p>\n\n\n\n<figure class=\"gb-block-image gb-block-image-d0e5fd81\"><img loading=\"lazy\" decoding=\"async\" width=\"927\" height=\"833\" class=\"gb-image gb-image-d0e5fd81\" src=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram2.jpg\" alt=\"Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram2\" title=\"Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram2\" srcset=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram2.jpg 927w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram2-300x270.jpg 300w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-vs-Passive-Buzzer-Internal-Diagram2-768x690.jpg 768w\" sizes=\"(max-width: 927px) 100vw, 927px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-text-align-justify\">Inside a passive buzzer, you can find the piezoelectric disc, a PCB, and it has no backside cover. Note that there is a hole in the top casing which allows the sound waves to travel through.<\/p>\n\n\n<h2 class=\"gb-headline gb-headline-b46d3914 gb-headline-text\" id=\"active-buzzer-vs-passive-buzzer\"><strong>Active Buzzer Vs Passive Buzzer<\/strong><\/h2>\n\n\n<p>Here is how you can easily differentiate between an Active buzzer and a passive buzzer:<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>1- By looking at the back of the buzzer<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-justify\">As you can see in the picture below, the passive buzzer doesn&#8217;t &#8220;usually&#8221; have a backside cover, unlike the Active buzzer. This can ease your task of identifying an Active buzzer from a passive buzzer. However, it&#8217;s not guaranteed to always look like this and that&#8217;s why we need another test to make sure that what we think is an Active buzzer is actually correct.<\/p>\n\n\n\n<figure class=\"gb-block-image gb-block-image-98120b37\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"518\" class=\"gb-image gb-image-98120b37\" src=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-Vs-Passive-Buzzer.jpg\" alt=\"Active-Buzzer-Vs-Passive-Buzzer\" title=\"Active-Buzzer-Vs-Passive-Buzzer\" srcset=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-Vs-Passive-Buzzer.jpg 1000w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-Vs-Passive-Buzzer-300x155.jpg 300w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Active-Buzzer-Vs-Passive-Buzzer-768x398.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>2- By connecting the buzzer to a 5v DC supply<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-justify\">By connecting the buzzer to a +5v DC supply, we can easily identify the Active buzzer from the passive buzzer. Because both of them have a different response to a constant +5v DC voltage, and it goes like this:<\/p>\n\n\n\n<ul>\n<li><strong>Active Buzzer<\/strong>: will generate a continuous tone of buzzing sound until you disconnect the DC voltage supply.<\/li>\n\n\n\n<li><strong>Passive Buzzer<\/strong>: will do a &#8220;click&#8221; sound (like a relay) the moment you apply DC voltage to it. Disconnect the voltage source and reconnect it again to hear the clicking sound again.<\/li>\n<\/ul>\n\n\n\n<p>And that&#8217;s how you&#8217;d differentiate between an active buzzer and a passive buzzer.<\/p>\n\n\n<div class=\"gb-container gb-container-30d92673\"><div class=\"gb-inside-container\">\n<div class=\"gb-headline gb-headline-b04bb8fe gb-headline-text\">\u2755  Note<\/div>\n\n\n<p class=\"has-text-align-justify\">Passive buzzers will draw significantly more current compared to active buzzers when your supply it with a DC voltage source. Make sure you&#8217;re connected to a current limited source (set the limit to 50mA). Alternatively, you can use a 100\u03a9 series resistor for current limiting to stay on the safe side.<\/p>\n\n<\/div><\/div>\n\n<h2 class=\"gb-headline gb-headline-07d742ce gb-headline-text\" id=\"arduino-buzzer-interfacing-examples\"><strong>Arduino Buzzer Interfacing Examples<\/strong><\/h2>\n\n\n<p class=\"has-text-align-justify\">It&#8217;s highly recommended to check out the tutorial below to learn more about Arduino (Active &amp; Passive) Buzzer Interfacing with code examples.<\/p>\n\n\n<div class=\"gb-container gb-container-8529537a\"><div class=\"gb-inside-container\">\n<div class=\"gb-headline gb-headline-9d152e12 gb-headline-text\">????  Also Read<\/div>\n\n<div class=\"gb-grid-wrapper gb-grid-wrapper-3f26d73f\">\n<div class=\"gb-grid-column gb-grid-column-22852764\"><div class=\"gb-container gb-container-22852764\"><div class=\"gb-inside-container\">\n\n<figure class=\"gb-block-image gb-block-image-01f16985\"><a href=\"https:\/\/deepbluembedded.com\/arduino-active-passive-buzzer\/\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"169\" class=\"gb-image gb-image-01f16985\" src=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Arduino-Buzzer-Code-Example-Tutorial-300x169.jpg\" alt=\"Arduino Buzzer Code Example Tutorial\" title=\"Arduino Buzzer Code Example Tutorial\" srcset=\"https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Arduino-Buzzer-Code-Example-Tutorial-300x169.jpg 300w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Arduino-Buzzer-Code-Example-Tutorial-1024x576.jpg 1024w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Arduino-Buzzer-Code-Example-Tutorial-768x432.jpg 768w, https:\/\/deepbluembedded.com\/wp-content\/uploads\/2023\/05\/Arduino-Buzzer-Code-Example-Tutorial.jpg 1280w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/figure>\n\n<\/div><\/div><\/div>\n\n<div class=\"gb-grid-column gb-grid-column-da0e28de\"><div class=\"gb-container gb-container-da0e28de\"><div class=\"gb-inside-container\">\n<div class=\"gb-headline gb-headline-2055a487 gb-headline-text\"><a href=\"https:\/\/deepbluembedded.com\/arduino-active-passive-buzzer\/\">Arduino (Active &amp; Passive) Buzzer Interfacing<\/a><\/div>\n\n\n<p class=\"has-text-align-justify\">This tutorial will give you more information about Active &amp; Passive buzzers interfacing with Arduino. You&#8217;ll also learn to use Buzzers with Arduino through some code examples.<\/p>\n\n<\/div><\/div><\/div>\n<\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p> &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Active Buzzer vs Passive Buzzer\" class=\"read-more button\" href=\"https:\/\/deepbluembedded.com\/active-buzzer-vs-passive-buzzer\/#more-9329\" aria-label=\"Read more about Active Buzzer vs Passive Buzzer\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":9345,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[266,66],"tags":[302],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Active Buzzer vs Passive Buzzer<\/title>\n<meta name=\"description\" content=\"Active Buzzer vs Passive Buzzer. 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