In the classroom or on a test, these should be given or implied in the problem. Let’s think about a real world example though. Let’s think about using it for an input. Let’s say we are working on a burglar alarm system in a shop and the inputs ABC corresponding to The discrete signals “Arm Alarm”, “Door alarm”, and “motion sensor”. The combinations of 111, 101, and 110 return an output of 1 (or sound alarm). The combination of 100 results in a 0 output (no alarm). What about the remaining 4 cases in the truth table? They can be quickly described as 0dd and they correspond to an output of 0, right? When we use don’t cares in the outputs it usually corresponds to combinations of inputs we don’t expect to see. A good example would be turning on a left and right turn signal at the same time... by adding don’t cares, we can (Hopefully) make larger groups and reduce our input requirements to our gates. The result of this is less reliability If a forbidden input state is entered. However, you just made your circuit much simpler and cheaper by using less or simpler components.
this is one of the best explanations of any concept ive ever had to look up, goodjob man
Thanks
4,5,12,13 can be grouped upto a subcube of size 4
Dear Craig Robertson, how do I find the SOP on a 3 variable K Map?
Thanks A lot you have helped me a lot
Thanks Craig!
Nice sir
You should have continued the session
HOW DO YOU FIND THE DON'T CARES bruhh
Thank you
Such beautiful hands
I don't get the "don't care". Can someone please help?
Hi, it means that we don’t care what the outcome is. You can group it or don’t group it. It can be used to our advantage or ignored completely.
@@craigrobertson1989 And i suppose, it is always given in the Question right?
In the classroom or on a test, these should be given or implied in the problem. Let’s think about a real world example though.
Let’s think about using it for an input. Let’s say we are working on a burglar alarm system in a shop and the inputs ABC corresponding to The discrete signals “Arm Alarm”, “Door alarm”, and “motion sensor”. The combinations of 111, 101, and 110 return an output of 1 (or sound alarm). The combination of 100 results in a 0 output (no alarm). What about the remaining 4 cases in the truth table? They can be quickly described as 0dd and they correspond to an output of 0, right?
When we use don’t cares in the outputs it usually corresponds to combinations of inputs we don’t expect to see. A good example would be turning on a left and right turn signal at the same time... by adding don’t cares, we can (Hopefully) make larger groups and reduce our input requirements to our gates. The result of this is less reliability If a forbidden input state is entered. However, you just made your circuit much simpler and cheaper by using less or simpler components.
@@craigrobertson1989 Wow very insightful. Thank you sir!
if it expands your group you should use it
the sound is not good I am quite disappointed