{"product_id":"real-time-clock-tinyshield","title":"Real-Time Clock TinyShield","description":"\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cstrong\u003eLithium Battery Shipping:\u003c\/strong\u003e\u003c\/span\u003e Due to courier restrictions, this product can only be shipped within the United Kingdom. With this item in your cart your shipping options will be limited and may cost more than our usual rates. Why?\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eThis TinyShield lets you add a battery-backed real-time clock (RTC) to your TinyDuino projects. This lets your project keep accurate time even through the TinyDuino being reprogrammed or power losses. It is based around the Maxim DS1339 RTC and supports counting in seconds, minutes, hours, days, date, month and year with leap-year compensation (valid up to 2100).\u003c\/p\u003e\n\u003cp\u003eThe RTC has two time-of-day alarms that can be set to wake up the main TinyDuino processor from sleep (very useful in long term data logging applications) and will automatically switch to using the backup battery upon power loss.\u003c\/p\u003e\n\u003cp\u003eThe backup battery is a rechargeable Lithium coin cell that is soldered onto the TinyShield and will keep the RTC time for 2.5 years before being recharged. Trickle charging of the backup battery can be enabled using a software command.\u003c\/p\u003e\n\u003cp\u003eTo learn more about the TinyDuino Platform, click here.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eTo see what other TinyShields this will work with or conflict with, check out the \u003c\/span\u003eTinyShield Compatibility Matrix\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMaxim DS1339 Real-Time Clock (RTC)\u003c\/span\u003e Specs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReal-Time Clock (RTC) Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap-Year Compensation Valid Up to 2100\u003c\/li\u003e\n\u003cli\u003eTwo Time-of-Day Alarms\u003c\/li\u003e\n\u003cli\u003eOscillator Stop Flag\u003c\/li\u003e\n\u003cli\u003eAutomatic Power-Fail Detect and Switch Circuitry\u003c\/li\u003e\n\u003cli\u003eBackup battery trickle charge (software controlled)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTinyDuino Power Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eVoltage: 3.0V - 5.5V \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eCurrent: 450uA (Active Mode). \u003c\/span\u003eDue to the low current, this board can be run using the TinyDuino coin cell option\u003c\/li\u003e\n\u003cli\u003eBuilt in Backup Battery\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003e11mAh rechargeable Lithium 3.0V backup battery.\u003c\/li\u003e\n\u003cli\u003eProvides 2.5 years of timekeeping backup\u003c\/li\u003e\n\u003cli\u003eBackup battery trickle charging under software control\u003c\/li\u003e\n\u003cli\u003eBackup battery current: 600 nA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePins Used\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA5\/SCL - I2C Serial Clock line\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eA4\/SDA - I2C Serial Data line\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003e20mm x 20mm (.787 inches x .787 inches)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMax Height (from lower bottom TinyShield Connector to upper top TinyShield Connector): 5.11mm (0.201 inches)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eWeight: 1.58 grams (.06 ounces)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eDownloads\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTutorial\u003c\/li\u003e\n\u003cli\u003eMaxim DS1339 product page\u003c\/li\u003e\n\u003cli\u003eDatasheet\u003c\/li\u003e\n\u003cli\u003eSchematic\u003c\/li\u003e\n\u003cli\u003eEagle Files\u003c\/li\u003e\n\u003cli\u003eSample Arduino code\u003c\/li\u003e\n\u003cli\u003eCAD 3D and 2D Files\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eNotes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eThe backup battery can be recharged from the main TinyDuino power supply via a software command, see the example code or the datasheet for more information.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tiny Circuits","offers":[{"title":"Default Title","offer_id":53751182524779,"sku":"ncs1787258035528","price":5.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/1268\/3883\/files\/real-time-clock-tinyshield_1.jpg?v=1787258044","url":"https:\/\/pickvirello.com\/products\/real-time-clock-tinyshield","provider":"Pickvirello","version":"1.0","type":"link"}