Free Elektor Article: The RV-3029-C2 “Swiss Clock”

Off-air awfully accurate drop-in RTC & calendar on I²C

This RTC & Calendar board is built around Micro Crystal’s type RV-3029-C2 integrated circuit. The ‘3029 is a real-time-clock/calendar (RTC) cheerfully communicating via the I2C protocol. It offers good precision out of the box, and fine precision when tweaked.

Features:

• Micro Crystal RV-3029-C2 RTC/Calendar chip
• Battery backup
• Selectable clock output
• 6 ppm max. error default
• 3 ppm error achievable with DTCXO tweaking
• I2C connectivity
• Free Arduino test & config utility
• Drop-in module

Free Elektor Article: The RV-3029-C2 “Swiss Clock” – [Link]