There is currently a good range of real-time clock chips available for use in microcontroller systems. One interesting, low-cost example is the DS1307 from Dallas Semiconductor which has a built-in serial I2C interface.
Click below to download a PDF copy of this article from Elektor magazine.
The aim of this book is to teach you the basic principles of CAN networks and in addition the development of microcontroller based projects using the CAN bus.