For this lab you need to use Proteus and send your project file containing your

schematic and the source code.

$1-$ Connect the following components to an $8051$: an LCD, eight LM$335$

temperature sensors$,$ an ADC$0804$ analog to digital converter, a $4*4$ keypad, and a

$4051$ analog multiplexer. Explain the connections in a detailed way.

$2-$ Write a program that displays the max, min and average values of the sensors

on the LCD. The temperature can be between $-30$ to $+50$ Celsius. These values

should be display on the first line of the LCD as follows:

Ag$=$xxx M$=$xxx$,$xxx

Which are the average, maximum and minimum, respectively.

The user can select a specific channel to monitor it individually, for this purpose

the user should enter a number between $1$ to $8$ and then press the $=$ key $($ the

program doesn$$t display any message for this operation$).$ The value of the selected

channel will be displayed on the left side of the $2$nd line of the LCD as follows:

CHx$=$xxx

Where x in CHx should be replaced by the selected channel$$s number. By default,

the channel one is selected and displayed on the LCD in the beginning.

Finally the program should display one of the following message on the $2$nd line of

the LCD$($ right to the CHx$=$xxx message$)$

If the average temperate is negative and the maximum is negative, then displays

State$=1$

Else If the average temperate is negative and the maximum is positive, then

displays State$=2$

Else If the average temperate is positive and at least two of the sensors are

negative, then displays State$=3$

Else If sensors #$1,$#$3,$#$5$ and #$7$ are positive and the other ones are negative displays

State$=4$