What does a DS1307 RTC module do?
The DS1307 serial real-time clock (RTC) is a low- power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM. Address and data are transferred serially through an I2C, bidirectional bus. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information.
How many alarms can be on DS1307?
I have read in an old post(2010) in this forum that, the library supports 6 alarms(can be changed from the header file), and requires 12 bytes of memory each.
How accurate is DS1307?
Accuracy Results
| Device | Test Length (Seconds) | Measured PPM |
|---|---|---|
| DS1307 | 292,869 | 15 PPM |
| DS3231 | 3,432,851 | < 0.3 PPM |
| PCF8563 | 3,432,851 | 24 PPM |
| MCP79400 | 3,432,851 | 4 PPM |
Does Arduino have clock?
The Arduino does have a built-in timekeeper called millis() and theres also timers built into the chip that can keep track of longer time periods like minutes or days. Look on your shield to see if you see PCF8523 written above the chip.
What is the use of RTC module?
RTC is an electronic device in the form of an Integrated Chip (IC) available in various packaging options. The purpose of an RTC or a real-time clock is to provide precise time and date which can be used for various applications.
What is the name of DS1307 package?
DS1307 serial real-time clock
The DS1307 serial real-time clock (RTC) is a low-power, full binary-coded decimal (BCD) clock/calendar plus 56 bytes of NV SRAM.
What is the purpose of DS1307 pin 3?
Pin 3: Battery input for any standard 3V lithium cell or other energy source. Battery voltage should be between 2V and 3.5V for suitable operation. The nominal write protect trip point voltage at which access to the RTC and user RAM is denied is set by the internal circuitry as 1.25 x VBAT nominal.
Which RTC module is best?
Choosing The Right RTC For Your Project
- The DS-1307 is often the default choice for an RTC.
- The DS3234 has the distinction of using an SPI interface instead of I2C.
- The RV-1805 draws so little power that this Sparkfun module gets by without a backup battery at all.