Clock with LCD 1602 & DS1307

Make a clock with DS1307 real clock module and 1602 16×2 LCD panel with back-panel to convert it to I2C protocol. (I²C راه اندازی با)
The time and date will be displayed in alphanumeric on LCD.

Device: LCD 1602 with back-panel  (نمایشگر LCD 16×2 کاراکتری دو سیمی)

The communication requires only two pins on the microcontroller bord: A4 and A5.
SDA: Analog 4
SCL: Analog5
VCC: 5V
GND: GND terminals
Contrast Adjust : has a built in potentiometer for contrast adjustment.
I2C Address: in my case is 0x27

You should see the LCD light up by starting, if it dose not happened, you may want to turn down the contrast of the LCD.

LCD has 2 lines, 16 character in each line and each character have 5-pixel in width and 8-pixel in height.
The LCD supports up to 8 custom characters numbered from 0 to 7.

The DS1307 Real time use also I2C Protocol to communicate with arduino.

Driver IC: I²C DS1307 Real Time Clock
SCL: Analog 5  (clock line)
SDA: Analog 4   (data line)
Voltage: 3.3V to 5V
GND:  GND of Arduino
I2C Address: in my case was 0x68

Each device on the I²C bus has its own unique address. The LCD display used here has address 0x27.
You can use the scanner script to find  I²C addresses on arduino by using

The I²C address used by a device can be found with the sketch i2c_scanner

Scanning…
I2C device found at address 0x27 !
I2C device found at address 0x68 !
done

To drive LCD I’m using the LiquidCrystal_I2C library, which seems to be commonly used.