{"id":21158,"date":"2019-03-27T16:14:39","date_gmt":"2019-03-27T08:14:39","guid":{"rendered":"\/blog\/?p=21158"},"modified":"2019-04-03T09:44:28","modified_gmt":"2019-04-03T01:44:28","slug":"all-new-grove-current-sensors-on-newproductstuesday-seeed","status":"publish","type":"post","link":"https:\/\/www.seeedstudio.com\/blog\/2019\/03\/27\/all-new-grove-current-sensors-on-newproductstuesday-seeed\/","title":{"rendered":"New Grove-Current Sensors &#8211; #newproductsTuesday"},"content":{"rendered":"\n<p>Hey Seeekers!<\/p>\n\n\n\n<p>Welcome to NewproductsTuesday!!! This week, we are excited to have three different current sensor modules in our Grove ecosystem. They are the <a href=\"https:\/\/www.seeedstudio.com\/Grove-2-5A-DC-Current-Sensor-ACS70331-p-2929.html\">Grove &#8211; 2.5A DC Current Sensor(ACS70331)<\/a>, <a href=\"https:\/\/www.seeedstudio.com\/Grove-5A-DC-AC-Current-Sensor-ACS70331-p-2928.html\">Grove &#8211; \u00b15A DC\/AC Current Sensor (ACS70331)<\/a> and the <a href=\"https:\/\/www.seeedstudio.com\/Grove-10A-DC-Current-Sensor-ACS725-p-2927.html\">Grove &#8211; 10A Current Sensor (ACS725)<\/a> . We will guide you further about current sensors and the differences between those in this post. <\/p>\n\n\n\n<p style=\"text-align:center\"><strong><a href=\"https:\/\/www.seeedstudio.com\/Grove-2-5A-DC-Current-Sensor-ACS70331-p-2929.html\">Grove &#8211; 2.5A DC Current Sensor(ACS70331)<\/a><\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"https:\/\/www.seeedstudio.com\/Grove-2-5A-DC-Current-Sensor-ACS70331-p-2929.html\"><img decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/front-new-new-1030x602.png\" alt=\"\" class=\"wp-image-21204\" width=\"230\" height=\"134\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-new-1030x602.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-new-300x175.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-new-768x449.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-new.png 1222w\" sizes=\"(max-width: 230px) 100vw, 230px\" \/><\/a><\/figure><\/div>\n\n\n\n<p style=\"text-align:center\"><strong><a href=\"https:\/\/www.seeedstudio.com\/Grove-5A-DC-AC-Current-Sensor-ACS70331-p-2928.html\">Grove &#8211; \u00b15A DC\/AC Current Sensor (ACS70331)<\/a><\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"https:\/\/www.seeedstudio.com\/Grove-5A-DC-AC-Current-Sensor-ACS70331-p-2928.html\"><img decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/front-new-3-1030x598.png\" alt=\"\" class=\"wp-image-21201\" width=\"225\" height=\"130\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-3-1030x598.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-3-300x174.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-3-768x446.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-3.png 1140w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/><\/a><\/figure><\/div>\n\n\n\n<p style=\"text-align:center\"><strong><a href=\"https:\/\/www.seeedstudio.com\/Grove-10A-DC-Current-Sensor-ACS725-p-2927.html\"> Grove &#8211; 10A Current Sensor (ACS725) <\/a><\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"https:\/\/www.seeedstudio.com\/Grove-10A-DC-Current-Sensor-ACS725-p-2927.html\"><img decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/front-new-4-1030x589.png\" alt=\"\" class=\"wp-image-21202\" width=\"224\" height=\"128\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-4-1030x589.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-4-300x171.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-4-768x439.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/front-new-4.png 1146w\" sizes=\"(max-width: 224px) 100vw, 224px\" \/><\/a><\/figure><\/div>\n\n\n\n<p class=\"has-medium-font-size\"><strong>So, what is a current sensor?<\/strong><\/p>\n\n\n\n<p>A current sensor is a device that detects electric current in a wire,\nand converts current to a voltage that can be easily measured. Also, this will\nbe proportional to the current through the measured path.<\/p>\n\n\n\n<p>Current sensors are usually designed after taking two phenomena into consideration.<\/p>\n\n\n\n<p>When a current is flowing through a wire, <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>a voltage drop occurs <\/li><li>a magnetic field is generated<\/li><\/ul>\n\n\n\n<p>Therefore, based on this, there are two types of current sensing,<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Direct sensing <\/li><li>Indirect sensing <\/li><\/ul>\n\n\n\n<p>Direct sensing is based on Ohm\u2019s law and Indirect sensing is based on Ampere\u2019s Law.<\/p>\n\n\n\n<p><strong>Ohm\u2019s law <\/strong><\/p>\n\n\n\n<p>Ohm\u2019s law states that the current through a conductor between two points is directly proportional to the voltage across those two points.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/15536718701.png\" alt=\"\" class=\"wp-image-21208\" width=\"88\" height=\"47\"\/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/15537397671.png\" alt=\"\" class=\"wp-image-21270\" width=\"165\" height=\"61\"\/><\/figure><\/div>\n\n\n\n<p>Therefore, in direct sensing, the voltage drop is measured which is associated with the current passing through passive electrical components.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/new-3.png\" alt=\"\" class=\"wp-image-21210\" width=\"160\" height=\"186\"\/><\/figure><\/div>\n\n\n\n<p><strong>Faraday\u2019s Law&nbsp;<\/strong><\/p>\n\n\n\n<p>Faraday\u2019s Law relates the rate of change of magnetic flux through a loop to the magnitude of the electro-motive force induced in the loop.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/newnew1.png\" alt=\"\" class=\"wp-image-21244\" width=\"112\" height=\"48\"\/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/faraday.png\" alt=\"\" class=\"wp-image-21276\" width=\"249\" height=\"63\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/faraday.png 412w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/faraday-300x76.png 300w\" sizes=\"(max-width: 249px) 100vw, 249px\" \/><\/figure><\/div>\n\n\n\n<p><strong>Ampere\u2019s Law<\/strong><\/p>\n\n\n\n<p>Ampere\u2019s Law relates the integrated magnetic field around a closed loop to the electric current passing through the loop.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/15536852181.png\" alt=\"\" class=\"wp-image-21251\" width=\"156\" height=\"45\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/15536852181.png 318w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/15536852181-300x85.png 300w\" sizes=\"(max-width: 156px) 100vw, 156px\" \/><\/figure><\/div>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/15536854701.png\" alt=\"\" class=\"wp-image-21255\" width=\"247\" height=\"89\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/15536854701.png 409w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/15536854701-300x109.png 300w\" sizes=\"(max-width: 247px) 100vw, 247px\" \/><\/figure><\/div>\n\n\n\n<p>Therefore, indirect sensing involves the measurement of the magnetic field surrounding a conductor through which current passes. <\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/123.png\" alt=\"\" class=\"wp-image-21216\" width=\"345\" height=\"144\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/123.png 511w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/123-300x125.png 300w\" sizes=\"(max-width: 345px) 100vw, 345px\" \/><\/figure><\/div>\n\n\n\n<p>Generated magnetic field is then used to induce <g class=\"gr_ gr_3 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar only-ins replaceWithoutSep\" id=\"3\" data-gr-id=\"3\">proportional<\/g> voltage or current which is then transformed <g class=\"gr_ gr_4 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar multiReplace\" id=\"4\" data-gr-id=\"4\">to<\/g> a form suitable for measurement.<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>So, what\u2019s the difference between these&nbsp;sensor&nbsp;modules?<\/strong><\/p>\n\n\n\n<p>Well, all these modules are based on the indirect sensing method, but what\u2019s different is the theory of operation.<\/p>\n\n\n\n<p><a href=\"https:\/\/www.seeedstudio.com\/Grove-10A-DC-Current-Sensor-ACS725-p-2927.html\">The Grove &#8211; 10A DC Current Sensor (ACS725)<\/a> is a hall sensor whereas the <a href=\"https:\/\/www.seeedstudio.com\/Grove-2-5A-DC-Current-Sensor-ACS70331-p-2929.html\">Grove &#8211; 2.5A DC Current Sensor(ACS70331)<\/a> and the <a href=\"https:\/\/www.seeedstudio.com\/Grove-5A-DC-AC-Current-Sensor-ACS70331-p-2928.html\">Grove &#8211; \u00b15A DC\/AC Current Sensor (ACS70331)<\/a> are based on GMR (giant magneto-resistive)  elements.<\/p>\n\n\n\n<p>Hall effect is the production of a potential difference across an electrical conductor when a magnetic field is applied in a direction perpendicular to that of the flow of current. Therefore, the AC current is calculated by measuring the voltage drop across the resistor.<\/p>\n\n\n\n<p>On the other hand, GMR (giant magneto-resistive) elements are resistors that change resistance with the applied field and calculate current according to that. These elements function differently than the Hall-effect sensors because the applied magnetic field is parallel to the surface of the sensor rather than perpendicular to the sensor plane as with Hall sensors. The main advantage of GMR is that it is around 25 times more sensitive than Hall-effect sensors, making it suitable for measuring small currents.<\/p>\n\n\n\n<p>So, let&#8217;s have a look at the three sensors that we released. All these sensor modules are based on sensors by Allegro and here is a table of the comparison between them.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1030\" height=\"314\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/table-1030x314.png\" alt=\"\" class=\"wp-image-21232\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/table-1030x314.png 1030w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/table-300x91.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/table-768x234.png 768w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/table.png 1383w\" sizes=\"(max-width: 1030px) 100vw, 1030px\" \/><\/figure>\n\n\n\n<p>Please be careful when using these sensor modules, because if you come in contact with these modules, there is a danger of getting an electric shock.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/215-512.png\" alt=\"\" class=\"wp-image-21197\" width=\"194\" height=\"194\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/215-512.png 512w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/215-512-80x80.png 80w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/215-512-300x300.png 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/215-512-360x360.png 360w\" sizes=\"(max-width: 194px) 100vw, 194px\" \/><\/figure><\/div>\n\n\n\n<p>Here are pinout diagrams of these sensor\nmodules.<\/p>\n\n\n\n<p style=\"text-align:center\"><strong><a href=\"https:\/\/www.seeedstudio.com\/Grove-2-5A-DC-Current-Sensor-ACS70331-p-2929.html\">Grove &#8211; 2.5A DC Current Sensor(ACS70331)<\/a><\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"https:\/\/www.seeedstudio.com\/Grove-2-5A-DC-Current-Sensor-ACS70331-p-2929.html\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/pinout1.jpg\" alt=\"\" class=\"wp-image-21220\" width=\"530\" height=\"302\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout1.jpg 891w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout1-300x171.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout1-768x438.jpg 768w\" sizes=\"(max-width: 530px) 100vw, 530px\" \/><\/a><\/figure><\/div>\n\n\n\n<p style=\"text-align:center\"><strong><a href=\"https:\/\/www.seeedstudio.com\/Grove-5A-DC-AC-Current-Sensor-ACS70331-p-2928.html\">Grove &#8211; \u00b15A DC\/AC Current Sensor (ACS70331)<\/a><\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"https:\/\/www.seeedstudio.com\/Grove-5A-DC-AC-Current-Sensor-ACS70331-p-2928.html\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/pinout2.jpg\" alt=\"\" class=\"wp-image-21221\" width=\"470\" height=\"266\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout2.jpg 873w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout2-300x170.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout2-768x435.jpg 768w\" sizes=\"(max-width: 470px) 100vw, 470px\" \/><\/a><\/figure><\/div>\n\n\n\n<p style=\"text-align:center\"><strong><a href=\"https:\/\/www.seeedstudio.com\/Grove-10A-DC-Current-Sensor-ACS725-p-2927.html\">Grove &#8211; 10A Current Sensor (ACS725)<\/a><\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter is-resized\"><a href=\"https:\/\/www.seeedstudio.com\/Grove-10A-DC-Current-Sensor-ACS725-p-2927.html\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/blog.seeedstudio.com\/wp-content\/uploads\/2019\/03\/pinout3.jpg\" alt=\"\" class=\"wp-image-21222\" width=\"505\" height=\"292\" srcset=\"https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout3.jpg 871w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout3-300x174.jpg 300w, https:\/\/www.seeedstudio.com\/blog\/wp-content\/uploads\/2019\/03\/pinout3-768x446.jpg 768w\" sizes=\"(max-width: 505px) 100vw, 505px\" \/><\/a><\/figure><\/div>\n\n\n\n<p>So guys, that is it for this week\u2019s products release. Hope you guys like our new Grove current sensor modules!!! Stay tuned for more that are going to release next week!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hey Seeekers! Welcome to NewproductsTuesday!!! This week, we are excited to have three different current<\/p>\n","protected":false},"author":141,"featured_media":21264,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"iawp_total_views":0,"footnotes":""},"categories":[1],"tags":[6,1324,139,1325,12],"class_list":["post-21158","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-arduino","tag-current-sensor","tag-grove","tag-newproduct","tag-seeeduino"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>New Grove-Current Sensors - #newproductsTuesday - Latest News from Seeed Studio<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.seeedstudio.com\/blog\/2019\/03\/27\/all-new-grove-current-sensors-on-newproductstuesday-seeed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"New Grove-Current Sensors - #newproductsTuesday - Latest News from Seeed Studio\" \/>\n<meta property=\"og:description\" content=\"Hey Seeekers! 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