Teori Dasar Rem. Buku Panduan Teknik Mesin (tidak diterbitkan). Jakarta Timur: Universitas Darma Persada.Putu Giovani.
![Teori Teori](/uploads/1/2/6/2/126248434/157762867.png)
Introduction:
Apart from the arduino the DS1307 Integrated Circuit is the core of this project since it acts as the timekeeper and tells the arduino when it should leave the appliance on. The DS 1307 is specifically designed for timekeeping, The time is fairly accurate with an error (time drift) of about 1 minute per month. If u want to eliminate this u can go for the DS3234 which has a time drift of only 1 minute per year. For our particular application we can settle for the DS1307 itself.
The beauty of the DS1307 is that it has this backup coin cell. This Coin Cell is commonly the CR2032. This battery is more than enough for the IC since the DS1307 has a fairly low power consumption the backup battery life of the cell is about a minimum of 9 years of usage.
So now that the specs have been discussed lets talk about the communication. The DS 1307 communicates with the arduino using I²C communication. Simply put the chip sends data in decimal form such that each decimal form is 4 bits of binary data also known as Binary Coded Decimal System.
Important Pins:
5V Pin: When this pin is high then the ds1307 sends the data and when it is low it runs on the backup button cell.
GND: This is the ground pin for the module. Both the ground of the battery and the power supply are tied together.
SCL: It is the i2c clock pin - Which communicates with the RTC.
SDA: It is the i2c data pin - Which communicates with the RTC.
So now that the introductions are done lets get to actually making the module. The instructable has steps of the soldering and the places of the components in the board. Hope this method is better to understand than just providing the circuit diagram.