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arduino clock with Alarm

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 we can easily design alarm clock by using arduino UNO.The circuit is same as  Arduino nano clock .we have to add alarm to this code. we have to set alarm time and store this alarm data to eeprom.Here i want to inform that arduino nano has internal eeprom of 512 Bytes.here we can store that  alarm data.first we have to install eeprom liabrary which is #include <EEPROM.h> in arduino ide and then write code to write and read alarm data to & from eeprom. alarm code: Download this code is used to set two alarms and buzzer is used to beep alarm.

Arduino nano Clock

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RTC clock is required in many of electronics project to show time & date on display .We can esily  make a RTC clock by arduino nano. Components Required : Arduino Uno board DS1307 crystel 32.768KHz Battery 3.3v lcd 16x2 circuit diagram: Arduino is a most popular controller among the hobbyist & Developers. it can be easily program and debug.Here we are designing RTC clock.RTC clock has three main components DS3231 Or DS1307 and crystel oscillator ,battery 3.3v.Lcd 16x2 is used to display Clock or time & keypad is used to set time and date.Connect all wires and components according to circuit diagram given above. The next most important step is programming the arduino.First we have to install all required liabraries for code then Just copy paste this code on arduino ide . Download the code  Here As you program the arduino the default time will show on lcd 16x2.we have to set current time by using keypad.