Review: Arduino Based Alarm Clock System

The Data loggers are found everywhere, hand held thermal printer for Bus Ticketing, Power Supply Billing machine, Point of sale machine, digital alarm clocks etc. They need RTC or Real Time Clock for proper function as they have to retrieve data according to reference time stamp details. Although all Microcontrollers have in-built timers and clock functions, they go on zero when power is reset. So, standalone module is needed which must provide real time and clock function even when power is reset. So RTC module comes in action with every data logger system. 

The RTC or Real Time Clock is a Clock and Calendar maintaining chip and works with its own battery pack. It maintains both time and calendar functions and allows user to write program to act it like alarm also [despite beside it acts as clock]. The CMOS battery back-ups RTC to keep current time and calendar information updated.

 

Objective: To construct an arduino board based system which shows Real Time Clock and having alarm set facility. This is standalone system and can be used as add-on module with any other system where time keeping and alarm facility is needed.

Note that by modifying little in code program snoozing facility, multiple alarm set, stop watch function are also implemented. Care should be taken while inserting CMOS battery with RTC chip.

The system contains arduino board, LCD module, RTC module, buzzer and alarm setting switches. The Controller Module holds the program in its memory, read Setting switches, controlling RTC chip, shows data on Display Module and makes alarm sound by driving Alarm unit.

Default the system shows current time and date on Display Module. User can set alarm using setting switches. If alarm is set System makes buzzing sound at set time.

The system building processes teaches how to interface RTC chip, display module and alarm unit with microcontroller chip both using hardware and software techniques.

Applications:

¾    Data loggers, Timers, Alarm Clocks, House hold gadgets where timer is needed like microwave oven etc., or wherever standalone timer add-on module is needed

Title: Arduino Based Alarm Clock System

External Links: electronicshub.org

Keywords: Controller Module, Display Module, RTC Module, DS1307, Arduino, LCD module, Buzzer

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