00:01
Hello students, given that three locks are there, in order to open the lock, at least two person must be insert the key.
00:14
Three different keys are with three different person, at least two person must be insert the key.
00:21
Now we need to design the circuit to obtain when will door will get open.
00:29
So let us consider this with the truth table.
00:33
A, b, c signals are there, z will be the output.
00:38
First condition 0, 0, 0 that is no people is inserting the key, then output will be 0, 0, 0, 1.
00:49
Only one person is inserting the key, output will also 0, so key will not get open.
00:55
Here also same case, then 0, 1, 1.
01:02
In this case, the key will get open, door will get open because two people are inserting the key.
01:09
Then 1, 0, 0, here also again 0, 1, 0, 1, two people are inserting, so 1, it will get open, 1, 1, 0.
01:21
Again two people are inserting, it will get open.
01:24
If three people are inserting, that means at least two people must inserting the key, if three are inserting, then will also get open...