Timed bootup of the Rasp Pi with a real-time clock

Conclusion

The hardware and accompanying software introduced in this article can serve as the foundation for further developments. If you are inexperienced or out of practice with a soldering gun, you might want to get a little practice before you attempt this project. A plug board could serve as an alternative if you don't want to try your luck soldering.

Infos

  1. RTC MCP79410: http://www.microchip.com/pagehandler/en-us/technology/realtimeclock/products.html
  2. I2C wiki: https://i2c.wiki.kernel.org
  3. NE555 as a timer: http://en.wikipedia.org/wiki/555_timer_IC#Monostable
  4. Raspbian Wheezy: http://www.raspberrypi.org/downloads
  5. Dealing with I2C, time, and timer chips: http://www.lm-sensors.org/wiki/I2CTools
  6. NVRAM WakeUp: http://sourceforge.net/projects/nvram-wakeup/
  7. Unix time: http://en.wikipedia.org/wiki/Unix_time

The Author

Werner Hein has been working with Linux in his free time since 1994. In 1997, he started working professionally on the development of modems for mobile telephones. There are also alarm clocks in mobile telephone modems; however, these have significantly higher clock resolution and much shorter wake-up cycles. This is because it doesn't do at all to lose a call or a message

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