You will design the logic for a $4-$bit BCD counting system. BCD is a system of binary where $4-$digit binary

represents a decimal $(0-9)$ digit. The decimal$-$binary equivalent for one decimal digit $(4-$bits$)$ is:

Your program will be designed to keep track of a decimal count from $0-9,$ which will increment every $1$

second when enabled. When the counter reaches $9,$ the counting needs to stop, and will reset and go

again if the enable $($start tag$)$ is flipped again.

Lab Task

This will take time to correctly complete, start early and plan your code carefully!

Your code needs to do the following:

$1.$ A Boolean tag will represent a start button.

a$.$ Your count should at $0$ and count towards $9$ when the start tag is ON

b$.$ Your count should go up by $1$ every $1$ second

c$.$ Your count should reset to $0$ if the $$start$$ returns to OFF

$2.$ You are required to have four outputs

a$.$ One output for each binary bit, as noted in the table above $($B$4,$ B$3,$ B$2,$ B$1).$

b$.$ Make sure your bit outputs are in order $($top to bottom, or bottom to top$)$ and

not scrambled around in your PLC rungs of logic.

c$.$ Each output bit should correspond to the count mentioned above and show the

correct binary.