{"product_id":"rasclock-raspberry-pi-real-time-clock-module-v42-discontinued","title":"RasClock - Raspberry Pi Real Time Clock Module V4.2 [Discontinued]","description":"\u003cp\u003e\u003cstrong\u003eRasClock\u003c\/strong\u003e is a highly accurate real-time clock that plugs directly into the Raspberry Pi and includes a battery backup. The module is installed directly into the GPIO header pins with no wiring or soldering. It uses the 3.3V, GND SDA and SCL pins. The module stays within the outline of the Raspberry Pi and sits lower than video output so can be easilly installed within most cases.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpdated V4.2\u003c\/strong\u003e - The Rasclock now features an 8 Pin Header input, so boards can be stacked on top!\u003c\/p\u003e\n\u003cdiv\u003eRasClock uses one of the following chips:\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eNXP PCF2127AT\u003c\/li\u003e\n\u003cli\u003eNXP PCF2127T\u003c\/li\u003e\n\u003cli\u003eNXP PCF2129AT\u003c\/li\u003e\n\u003cli\u003eNXP PCF2129T\u003c\/li\u003e\n\u003c\/ul\u003e\nAll of these have the following features:\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eVery accurate timekeeping (typically ±3ppm or \u0026lt;2 minutes deviation per year).\u003c\/li\u003e\n\u003cli\u003eIntegrated crystal that compensates for temperature and age.\u003c\/li\u003e\n\u003cli\u003eA 36mA 3V CR1220 battery will keep the time for around two years if the device isn't used and considerably longer if it is.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do I need a Real Time Clock for my Raspberry Pi?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eThe Raspberry Pi is an ultra-small and ultra-low cost computer. In order to achieve this size and price, several non-essential items usually found on a computer had to be omitted. Laptops and computers keep time when the power is off by using a pre-installed, battery powered 'Real Time Clock' (RTC). However, this Real Time Clock module is not included with the Raspberry Pi. To keep time, the Raspberry Pi updates the date and time automatically over the internet via Ethernet or WiFi.\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eThe Raspberry Pi will simply revert back to the standard date and time settings (usually 30 November 1999) when the network connection is removed. So, for projects which have no internet connection, you may want to add a low cost battery powered RTC to help your Pi keep time!\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e \u003c\/div\u003e\n\u003cdiv\u003eThe RasClock has been specifically designed for use with the Raspberry Pi and, unlike other RTC's available, can plug directly in to the Raspberry Pi's GPIO Ports.\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I set it up?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePlease see the latest installation instructions on Afterthought Software for installation on Jessie\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRaslock is now included in the standard Raspian build. \u003cstrong\u003eDetailed instructions are available here!\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSet up is easy, simply follow the guide Outlined in the ModMyPi \u003cstrong\u003eRaspberry Pi Tutorial Here!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Afterthought","offers":[{"title":"Default Title","offer_id":48624003842266,"sku":"jdd1789680695318","price":9.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0824\/8318\/3834\/files\/rasclock---raspberry-pi-real-time-clock-module-v42-discontinued_1.jpg?v=1789680700","url":"https:\/\/memoryfoamwear.shop\/products\/rasclock-raspberry-pi-real-time-clock-module-v42-discontinued","provider":"My Store","version":"1.0","type":"link"}