Help on a simple project

Thread Starter

ravapps

Joined Sep 1, 2013
1
I need help on one of my friend's project in his studies. Project is : Two 12 volt DC inputs named A and B given, if A input goes off then a buzzer and small LED is switched on and if A input comes back the buzzer and small LED is switched off. Please help with diagram so that I can tell perfectly. I am beginner in electronics
 

WBahn

Joined Mar 31, 2012
29,932
So your friend wants you to do his homework for him and, in turn, you want us to do it for you.

Classic.

Would it be possible for the two of you to come up with at least an attempt as a solution that we can discuss?
 
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