finally~
i can understand the circuit given by on1aag.
fuh~
its working~
thanx alot~
i will try with all inputs that i have to confirm it~

 

Hi Cucumber,

From 0000 to 1001 the circuit only passes the data from the
inputs to the outputs. Disconnect the output from the third
nand from the full adder and ground the pins of the full adder
with value "2" and "4" and repeat the test from 0000 to 1001.
Then check the outputs of the first two nands, one output
should be zero at 101X, the other should be zero at 110X, in
both cases the output of the third nand should be logical 1.
At 111X both nands connected to the inputs should be logical
0 and the third should be logical 1.
There's nothing wrong with the circuit, the problem lies with
the cucumber who is trying to duplicate it !

on1aag.

 

thanks alot on1aag~
its really help~
i already checked it, and its working~