![]() ![]() So the module is only 2 x 3 cm in size, which is pretty compact. Hope this method is better to understand than just providing the circuit diagram. ![]() The instructable has steps of the soldering and the places of the components in the board. So now that the introductions are done lets get to actually making the module. ![]() SDA: It is the i2c data pin - Which communicates with the RTC. SCL: It is the i2c clock pin - Which communicates with the RTC. Both the ground of the battery and the power supply are tied together. GND: This is the ground pin for the module. Important Pins:ĥV Pin: When this pin is high then the ds1307 sends the data and when it is low it runs on the backup button cell. 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. The DS 1307 communicates with the arduino using I☬ communication. So now that the specs have been discussed lets talk about the communication. 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. The beauty of the DS1307 is that it has this backup coin cell. For our particular application we can settle for the DS1307 itself. If u want to eliminate this u can go for the DS3234 which has a time drift of only 1 minute per year. The DS 1307 is specifically designed for timekeeping, The time is fairly accurate with an error (time drift) of about 1 minute per month. When I designed this module I ignored the square wave pin, Since I didn't find it useful in my application but you may add an extra pin if the need arises.Īpart 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.
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