20pcs Clock Shield RTC DS1307 Module Multifunction Expansion Board with 4 Digit Display Light Sensor and thermistor OPEN-SMART for Arduino – products that work with official for Arduino boards

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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 cheap
2. Can be directly inserted on the compatible board for Arduino
3. The on-board real-time clock chip
4. For Arduino rich supporting experimental routines with other SCM systems
5. Handy and pretty cheap
Specification
Item:Min:Typical values:Max:Unit
Voltage:4.5:5:5.5:V
Current:-:80:-:mA
Size:74x59x30:mm
Net weight:35:g
Interface
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 interface
D2:control blue LED1;
D3:Control the green LED2;
D4:Control the red LED3;
D5:Control the red LED4;
D7:connection TM1636 clock pin SCLK;
D8:TM1636 data connection pin DIO;
D9:control keys K1;
D10:control buttons K2;
D11:control buttons K3;
A0:poll readings from temperature sensor;
A1:poll readings from the light sensor;
A4:connect the DS1307 I2C data pin SDA;
A5:connect the DS1307 I2C clock pin SCL
Package includes
20 x Clock Shield

Additional information