{"product_id":"1011012","title":"RTC Card","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1023\/5025\/8542\/files\/longan-description-72acb654d277fa7c2a4c900d0e09e3ba2d42453c7c01b2ccb1bece6645b7224e.png?v=1789434333\" alt=\"\"\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003eRTC, real-time clock, provides accurate time reference for electronic systems, especially those without network connection, by using the vibration of crystal oscillator as reference frequency. If the RTC chip works when the main power is cut off, additional battery power is required. ↓\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-ff5b7f1396f6fb998aa733f7f8e2851b1c5f016348d4baf831c57984731ea724.jpg?v=1789434338\" alt=\"\"\u003e\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"font-size: medium;\"\u003eFor simple electronic projects, RTC enables more accurate data processing. For example, it is easy to tell when came the sharp changes in temperature, at night? Or at noon. Send the feeding signal every 4 hours from dawn to early night every day, to realize more intelligent pet feeding operation.\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;\"\u003eRTC Card is based on the \u003cstrong\u003eDS1307\u003c\/strong\u003e chip, which supports the I2C protocol. The card requires a Lithium cell battery (CR1225) to operate a long period continuously. The clock operates in either the 24-hour or 12-hour format with AM\/PM indicator. The card requires to insert 3V CR1225 lithium cell battery into the battery holder.\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;\"\u003eATmega 168PA microprocessor\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium; color: #333333;\"\u003eSupports two wire I2C bus interface\u003c\/span\u003e\u003c\/li\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;\"\u003e\u003cspan\u003eBattery Voltage：2.0-3.5 V\u003c\/span\u003e\u003c\/span\u003e\u003c\/li\u003e\r\n\u003cli\u003e\u003cspan style=\"font-size: medium; color: #333333;\"\u003e\u003cspan\u003eDS1307 chip\u003c\/span\u003e\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 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\/1011012\/\" 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":55012256678254,"sku":"1011012","price":25.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1023\/5025\/8542\/files\/1011012-1_1.jpg?v=1789355897","url":"https:\/\/longan-labs.cc\/products\/1011012","provider":"Longan Labs","version":"1.0","type":"link"}