Newbie..need help with alarm clock

Thread Starter

Sugandh Sachdev

Joined Oct 15, 2015
6
I am a newbie with electronics and as a project I took alarm clock. I have made the digital clock using Binary counters and 7 segment display but I have no idea how to enable alarm system in it. Can you please at least give me an idea how it would be done or where to start from?
 

Dodgydave

Joined Jun 22, 2012
8,389
Lets start by you showing us the circuit that you have made, then we can assist you with it.
 

Dodgydave

Joined Jun 22, 2012
8,389
I take the clock starts at Zero and goes upto 12-00-00, do you want to have an output at a certain time, say 07-30-00,?
 
Last edited:

Thread Starter

Sugandh Sachdev

Joined Oct 15, 2015
6
So you set a DIP switch for each digit. What do you want to compare it to? For example, consider just the 10s of minutes digit?
OHH I think I got it.
Compare it with the current time. when the the current time and the input in dip switch matches a buzzer is activated.
Thanks for the help
 

djsfantasi

Joined Apr 11, 2010
5,601
OHH I think I got it.
Compare it with the current time. when the the current time and the input in dip switch matches a buzzer is activated.
Thanks for the help
Have you simulated this? I had a reason for asking before.

I suggest you do, even if you run through it manually. I have a suspicion...

Your minutes and seconds may only count up to 58, leaving you a a few seconds short of a minute and a few minutes short of an hour...
It will be a fast clock. Depending on what you're using it for, it could be a good thing or a bad thing.
 
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