{"product_id":"1012001","title":"Relay Card","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1023\/5025\/8542\/files\/longan-description-844a80ba1fb25fd1bd584c844de9fdc27715f51a915b057c3648ca946cb090cf.png?v=1789434355\" alt=\"\"\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003eRelay is a device controlling large current through small current. A relay system usually consists of small current circuit, large current circuit, and circuit conversion part. When the low current circuit reaches a certain condition, it will trigger the high current circuit through the conversion section. This method is more safe and flexible than direct control of large current circuits.\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003eCommon ways of circuit conversion are electromagnetic, solid state, magnetic spring, temperature, light, etc. Relay Card is a reed type. With the help of Relay Card and other sensors, it is easy to automatically turn on air conditioner when detected the temperature is high.\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003eRelay Card allows you to control the circuit of high voltage with a low voltage, say 5V from the Carduino. The relay on the Relay Card is normally-opened. You can connect any high voltage appliance through the 2-pin terminal block connector on the front of the board. The maximum voltage ratings for the high voltage appliances are 3A@250V AC and 3A@30V DC. When you apply a 5V signal to the Relay Card, the relay gets close, and the connected device will turn ON.\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cstrong\u003eCAUTION:\u003c\/strong\u003e Don't touch Relay Card while connected to the mains electricity or high voltage DC.\u003c\/span\u003e\u003c\/p\u003e\r\n\u003chr\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003ch2\u003e\u003cstrong\u003e\u003cspan style=\"color: #ffc100;\"\u003eSpec:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\r\n\u003cp\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cdiv\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium; color: #333333;\"\u003eOperating voltage: 5V\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium; color: #333333;\"\u003eMaximum switching voltage: 250V AC\/30V DC\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium; color: #333333;\"\u003eMaximum switching current: 3A\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium; color: #333333;\"\u003eRelay life: 100,000 Cycle\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium; color: #333333;\"\u003e\u003cspan\u003eConnection: Goldfinger \/ Cable\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium; color: #333333;\"\u003eDimension: 40.5 x 33 x 1.2 mm\u003c\/span\u003e\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003c\/div\u003e\r\n\u003ch2\u003e\u003cstrong\u003e\u003cspan style=\"color: #ffc100;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\r\n\u003chr\u003e\r\n\u003ch2\u003e\u003cstrong\u003e\u003cspan style=\"color: #ffc100;\"\u003eReferences:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/h2\u003e\r\n\u003cul\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003ca href=\"https:\/\/docs.longan-labs.cc\/1012001\/\" target=\"_blank\"\u003eHow to Use\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium;\"\u003ePinout:\u003c\/span\u003e\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1023\/5025\/8542\/files\/longan-description-62908db678f1882bbc83c1cd716fc026a6059515e6d950671ca8d065ea28bf9d.png?v=1789434227\" alt=\"\"\u003e\u003c\/p\u003e\r\n\u003cstyle type=\"text\/css\" xml=\"space\"\u003e\u003c!--\np.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px 'Helvetica Neue'}\nspan.s1 {font: 12.0px '.PingFang SC'}\n--\u003e\u003c\/style\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003chr\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003ch2\u003e\u003cspan style=\"color: #ffc100;\"\u003e\u003cstrong\u003eLongan Cards:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003e\u003cspan\u003eL\u003cspan\u003eongan Cards is a unique \u003c\/span\u003e\u003cstrong\u003eopen-source development platform\u003c\/strong\u003e\u003cspan\u003e designed by Longan Labs. As a plug and play development tool, Longan Cards allows you to quickly build wide array of prototypes and applications in no time. A full set of Arduino libraries and plenty of example codes are available to play with Longan Cards system\u003c\/span\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1023\/5025\/8542\/files\/longan-description-9b76fb10ba24e8bc5af37eff51bb51f602bd282328d38915024c673bcc77f1f9.png?v=1789434232\" alt=\"\"\u003e\u003cspan\u003e↑ \u003c\/span\u003eLongan Cards system consists of \u003cstrong\u003eCards and Boards\u003c\/strong\u003e. There are many gold finger antennas on Card and several gold finger sockets on Board. They are combined together through sockets interpolation, which is intuitive and easy to use. With this unified and flexible interface, you can realize a variety of ideas. Many more Boards with different themes would luanch to help people explore more fun.\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1023\/5025\/8542\/files\/longan-description-526bb3f8dac10feec33e032ce1794229f06c03c30f987200061aec6139281c70.png?v=1789434241\" alt=\"\"\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003cspan\u003e↑ \u003c\/span\u003eLongan Cards modules are classified into many types. Firstly, \u003cstrong\u003ethe main control cards\u003c\/strong\u003e which are the heart of Cards system, run the code and take charge of the exchange of data between modules. Besides Carduino, you can also use MicroBit, Arduino and other development board through connection board. \u003cstrong\u003eThe sensor cards\u003c\/strong\u003e can detect data of surrounding such as temperature and air pressure, etc. \u003cstrong\u003eThe inputs cards\u003c\/strong\u003e allows you to do some operations, such as buttons, knobs, etc. \u003cstrong\u003eThe output cards\u003c\/strong\u003e give feedback in various forms, such as buzzers, motor drives, etc. \u003cstrong\u003eThe communication cards\u003c\/strong\u003e can transmit data in many ways, such as Bluetooth and 4G network. \u003cstrong\u003eThe power cards\u003c\/strong\u003e supply power for electronic projects, including batteries, DC, etc. And \u003cstrong\u003eother cards\u003c\/strong\u003e, mainly do some auxiliary work, such as expansion, code downloading, etc.\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1023\/5025\/8542\/files\/longan-description-c8d221ef6443805fd9ecb10dac268c79ea7d186ccc1eff07110575ee9ceb56c9.png?v=1789434246\" alt=\"\"\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003e↑ STEM is an acronym for \u003cstrong\u003escience\u003c\/strong\u003e,\u003cstrong\u003e technology\u003c\/strong\u003e,\u003cstrong\u003e engineering\u003c\/strong\u003e, and\u003cstrong\u003e math\u003c\/strong\u003e. STEM education began in the United States in the 1990s. It is an interdisciplinary teaching method that combines STEM content and real life situations, which helps stimulate students’ original curiosity and thirst for knowledge and novelty. Longan Cards contains dozens of modules, involving a wide range of knowledge in the process of use, including electronic circuit, mechanical structurenature, programming, science of nature, daily wisdom, and humanities, etc. It is a powerful tool for STEM education at fields of electronic prototyping, science experimentation and DIY project.\u003c\/span\u003e\u003c\/p\u003e","brand":"Longan Labs","offers":[{"title":"Default Title","offer_id":55012256776558,"sku":"1012001","price":24.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1023\/5025\/8542\/files\/1012001-1.jpg?v=1789355937","url":"https:\/\/longan-labs.cc\/products\/1012001","provider":"Longan Labs","version":"1.0","type":"link"}