TIme Switch Application

Projects General Guidance
1

Dear all,

I am trying to Build time Switch application For ATM machine. I am dividing 24 hours into 2 interval . 12 hours to run 2 Set of AC and other 12 hours by other AC.

Timing Has to be set by user.

I am using ardunio uno, lcd sheild ,and DS1307 for testing trial.

User can set time externally through LCD keypad sheild , as per Set time and working hours Device should get on.

I try to build using timealaram library But can't set define Time externally.

Is there any example code for building such code.

2

The web is full of Arduino libraries for the DS1307.

Please explain further "But can't set define Time externally".

3

ATM ? Automatic Teller Machine ?
Except for a very early prototype to test some functionality, an Arduino would not be considered robust enough for such a role. And what is an AC in this context ?

Anyway, some things to consider:

  • Automatic update for daylight saving time
  • For setting the switch times, a library is maybe overkill. Simply compare the current time HH:MM with the stored switch (ON/OFF) time.
  • A DS3231 is a much better real time clock than DS1307 and is generally compatible (libraries etc.)