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Pi RTC(DS1307), Real time
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This product is fully compatible with Raspberry Pi 4 (1GB, 2GB,4GB) and hopes you enjoy hacking with Pi 4 and all of other Pi 4 accessories.
The Pi RTC is based on the clock chip DS1307, it can provide a real-time clock(RTC) for raspberry pi via the I2C interface. Real-time clock of this module counts seconds,minutes, hours, date of the month,month, day of the week, and year with leap-year compensation valid up to 2100. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. If you want to keep this module timing when the Raspberry Pi is powered off, you need to put a 3-Volt CR1225 lithium cell in the battery-holder.
Support Raspberry Pi 2/ 3 B/B+ Zero/4
Suport seconds,minuutes,hours,day of week,month, year
Support 24-hour or 12-hour format with AM/PM indicator
56-byte, battery-backed, nonvolatile (NV) RAM for data storage
Programmable squarewave output signal
Automatic power-fail detect and switch circuitry
Applications need Real Time on Raspberry.
Pi RTC(DS1307) Eagle Files
Seeed Pi RTC Library
This is the wiki page for this product, which will show you how to use the product, as well as details about the software and hardware.