welcome to the tutorial of 2421, for 2421

weighted code you might have some question that for example

what's the correct way to write 2 or 4 5 lets find out

for 2 we could write simply that 0 0

1 0 or 1

0 0 then

which which one will be correct for four

also 0 1 0 0

and 1 0 1 0

but we can't understand that which one should be correct

let's find out here we have the decimal equivalent of

2 4 2 1 remember one thing that

every one code is a compliment of

another for decimal o's 9's compliment will be 9

1's 9's compliment will be 8

for 2 its 7 for three it's 6 for 4 it's 5

here is the binary code and it's 1's complement

we have to remember that for 0

2421 code will be 0 0 0 0

then it's 9's complement would

go to the 9 so its

like that and the code is

for 0000

it's 1's complement is 11

11 for 1, 2421 code is

0 0 0 1 and its

one's complement is one one

one 0

ok then for 2

0 0 one 0

and it's 1's compliment will be

one one 0 one

for 3,

0011 and its

one's complement is

1100 for 4

0100 and 5

1011

umm remember another thing that

it should be in increasing order

ok

Thank You...,