20pcs Clock Shield RTC DS1307 Module Multifunction Expansion Board with 4 Digit Display Light Sensor and Thermistor OPEN

Description Clock Shield digital clock module Shield contains the most resources for a basic electronic project like buttons sensors buzzers and display Combined with for Arduino compatible motherboard is a perfect start for beginners of for Arduino world Features 1 Brand new handy and pretty cheap2 Can be directly inserted on the compatible board for Arduino3 The on board real time clock chip4 For Arduino rich supporting experimental routines with other SCM systems5 Handy and pretty cheap Specification ItemMinTypical valuesMaxUnitVoltage4 555 5VCurrent 80 mASize74x59x30mmNet weight35gInterface Clock Shield interface as shown below Hardware resources Battery Holder Battery on the card to the real time clock chip power supply making the board can continue to power down timer Buzzer 5V DC buzzer do alarm clock key tone Photoresistor ambient light sensor Thermistor detecting environmental temperature K1 K3 SCM can be scanned directly touch of a button U5 TM1636 namely four 8 segment anodes LED Driver IC U3 DS1307 namely real time clock chip D1 D4 blue green red red 3mm plug LED Digital tube 4 8 segments of positive points with a digital clock and the decimal point is not displayed only for identification purposes direction Occupied For Arduino pin Resources Total occupied nine digital pins two analog input pins an I2C interfaceD2 control blue LED1 D3 Control the green LED2 D4 Control the red LED3 D5 Control the red LED4