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). ...
Get Mastering the Raspberry Pi now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
