# Newbie..need help with alarm clock

Discussion in 'The Projects Forum' started by Sugandh Sachdev, Oct 15, 2015.

1. ### Sugandh Sachdev Thread Starter New Member

Oct 15, 2015
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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?

2. ### Dodgydave AAC Fanatic!

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

Oct 15, 2015
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4. ### Dodgydave AAC Fanatic!

Jun 22, 2012
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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: Oct 15, 2015

Oct 15, 2015
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yep

6. ### djsfantasi AAC Fanatic!

Apr 11, 2010
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And how are you going to input the alarm time? Sets of SPST switches for each digit? A four position DIP switch? A thumb wheel BCD switch? The last is easiest, but is expensive.

Oct 15, 2015
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dip switch

8. ### djsfantasi AAC Fanatic!

Apr 11, 2010
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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?

By the way, have you simulated your circuit?

9. ### Sugandh Sachdev Thread Starter New Member

Oct 15, 2015
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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

10. ### crutschow Expert

Mar 14, 2008
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Just be sure you don't take it to school to show a teacher.

ISB123 likes this.

Apr 11, 2010
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