Module

• WIDE SUPPLY RANGE: 2.0V to 5.5V
• LOW CURRENT CONSUMPTION: Continuous Mode: Only 150µA Single-Shot Mode: Auto Shut-Down
• PROGRAMMABLE DATA RATE: 8SPS to 860SPS
• INTERNAL LOW-DRIFT VOLTAGE REFERENCE
• INTERNAL OSCILLATOR
• INTERNAL PGA
• I2C INTERFACE: Pin-Selectable Addresses
• FOUR SINGLE-ENDED OR TWO DIFFERENTIAL INPUTS
• PROGRAMMABLE COMPARATOR
• This board/chip uses I2C 7-bit addresses between 0x48-0x4B, selectable with jumpers

• The real-time clock counts minutes, seconds, date, hours, month day of the week, year and leap-year compensation upto 2100.
• 318 temporary data storage RAM
• Working current of 2.0V, less than 300nA
• Read / Write clock or RAM data with two kinds of mode of single-byte transfer mode and multi-byte character set
• 8 pin DIP package or optional 8 pin SOIC package based on the surface assembly
• Simple 3 wire interface
• Compatible with TTL Vcc=5V
• Double power supply pipe for main power and backup power supply.

DS1307 RTC REAL TIME CLOCK MODULE which adopts the I2C protocol to communicate with SCM, and there was this kind of interface on Arduino, therefore is very convenient to link with each other. DS1307 has a programmable waveforms output, it can be used to drive LED lights, or trigger a certain event as a break-off, but be careful when you use it to take some kind of high-power module. We design the real clock module to pin out the I2C interface of Ds1307 and programmable waveforms output interface SQW are connected, but usually, we will only use the I2C interface to realize the basic set of the clock/read function. Note, that this module must be installed on the battery and can work normally. The battery is button batteries (type CR2032 will be better), the positive upward: