August 2014
Beginner
504 pages
11h 2m
English
Content preview from Mastering the Raspberry Pi
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CHAPTER 25
Real-Time Clock
The Dallas Semiconductor DS1307 Real-Time Clock is the perfect project for the Raspberry Pi, Model A. Lacking a network port, the Model A cannot determine the current date and time when it boots up. A 3 V battery attached to the DS1307 will keep its internal clock running for up to 10 years, even when the Pi is powered off. If you have a Model B, don’t feel left out. There is no reason that you can’t try this project too; a Model B not connected to a network could use the DS1307.
DS1307 Overview
The pinout of the DS1307 chip is provided in Figure 25-1. The chip is available in PDIP-8 form or in SO format (150 mils). ...
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