VOTING MACHINE - Basic Version

Parts Needed:

• Switch
• 16x2 lcd
• 8051 microcontroller
• Buzzer

1.Switch:

2.16*2 LCD:

3.8051 microcontoller:

4.Buzzer:

HOW ITS WORKS:

  This machine records the number of times a each key is pressed.  It can count upto 100 digits.  Once the button Total is pressed, this machine will display the results through LCD.

CIRCUIT DIAGRAM:

CODE:

org 0x00

mov r7,#38h

call command

mov r7,#0eh

call command

mov r7,#06h

call command

jmp loop

start:

mov a,#00h

mov 50h,a

mov 52h,a

mov r0,#3h

mov r7,#01h

call command

mov r7,#'W'

call data

mov r7,#'E'

call data

mov r7,#'L'

call data

mov r7,#'C'

call data

mov r7,#'O'

call data

mov r7,#'M'

call data

mov r7,#'E'

call data

jmp loop

loop:

jnb p1.0,start

jnb p1.1,poll1

jnb p1.2,poll2

jnb p1.3,total

jmp loop

poll1:

inc 50h

clr p0.0

call delay

call delay

call delay

call delay

setb p0.0

mov r7,#01h

call command

mov r7,#'N'

call data

mov r7,#'E'

call data

mov r7,#'X'

call data

mov r7,#'T'

call data

call delay

jmp loop

poll2:

inc 52h

clr p0.0

call delay

call delay

call delay

setb p0.0

mov r7,#01h

call command

mov r7,#'N'

call data

mov r7,#'E'

call data

mov r7,#'X'

call data

mov r7,#'T'

call data

call delay

jmp loop

total:

mov a,50h

mov b,#10

div ab

orl a,#30h

mov r4,a

mov a,b

orl a,#30h

mov r3,a

mov r7,#01h

call command

mov r7,#'c'

call data

mov r7,#'1'

call data

mov r7,#':'

call data

mov a,r3

mov r7,a

call data

mov r7,#' '

call data

mov r7,#' '

call data

mov r7,#'c'

call data

mov r7,#'2'

call data

mov r7,#':'

call data

mov a,52h

mov b,#10

div ab

orl a,#30h

mov r4,a

mov a,b

orl a,#30h

mov r3,a

call delay

call delay

call delay

call delay

djnz r0,total

jmp loop

command:clr p3.6

mov p2,r7

setb p3.7

call delay

clr p3.7

ret

data:setb p3.6

mov p2,r7

setb p3.7

call delay

clr p3.7

ret

delay:mov r1,#255

loop2:mov r5,#255

loop1:djnz r5,loop1

djnz r1,loop2

ret

end

HEX CODE:

:100000007F381201127F0E1201127F0612011202B6

:020010000045A9

:100012007400F550F55278037F011201127F5712D6

:02002200011EBD

:100024007F4512011E7F4C12011E7F4312011E7F69

:010034004F7C

:1000350012011E7F4D12011E7F4512011E02004551

:100045003090CA30910930923730936202004505ED

:01005500505A

:10005600C28012012A12012A12012A12012AD28012

:100066007F011201127F4E12011E7F4512011E7F73

:010076005831

:1000770012011E7F5412011E12012A020045055269

:10008700C28012012A12012A12012AD2807F01128C

:02009700011254

:100099007F4E12011E7F4512011E7F5812011E7FDD

:0100A9005402

:1000AA0012011E12012A020045E55075F00A844425

:0100BA003015

:1000BB00FCE5F04430FB7F011201127F6312011E3D

:1000CB007F3112011E7F3A12011EEBFF12011E7FC0

:0100DB002004

:1000DC0012011E7F2012011E7F6312011E7F32123D

:0200EC00011EF3

:1000EE007F3A12011EE55275F00A844430FCE5F0A9

:1000FE004430FB12012A12012A12012A12012AD8B7

:01010E00A44C

:10010F00020045C2B68FA0D2B712012AC2B722D2BF

:01011F00B629

:100120008FA0D2B712012AC2B72279FF7DFFDDFE70

:03013000D9FA22D7

:00000001FF

 Output Image:

89s52 based Temperature Sensor using ADC

Process Diagram:

At  Maximum Temperature:


 

At minimum Temperature:



Parts Needed:

1.89s52 microcontroller

2.LM35

3.ADC 0804

4.LCD

 

1.89s52 microcontroller:

It is used to receive digital values from adc and control the lcd


 

 

 

 

 

 

 

 

2.LM35

It is used to sense Temperature.


 

 

 

 

 

 

 

 


3.ADC 0804:

It is used to convert analog signal into digital signal


 

4.LCD:

It will show the output according to the temperature getting from LM35.



 

How it works:

This project is all about using the ADC feature in 89s52 Microcontroller. ADC will get Analog input from LM35 Fire Sensor. LCD Will show the output variation from 0 to 255 based on temperature degree.
 

Circuit Diagram:

 

Code:

org 0x00

mov r1,#38H

call command

mov r1,#0EH

call command

mov r1,#06H

call command

mov r1,#01H

call command

start: clr p3.6

nop

setb p3.6

wait:jb p3.2,wait

acall read

acall conversion

call data2

call data1

call epr

call delay

call delay

call delay

call delay

call delay

call delay

mov r1,#01H

call command

call delay

jmp start

read:

clr p3.7

mov a,p0

mov 30h,a

setb p3.7

ret

delay:

mov r1,#255

l2: mov r0,#255

l1: djnz r0,l1

djnz r1,l2

ret

command:

clr p3.4

mov p2,r1

setb p3.5

call delay

clr p3.5

ret

data2:

setb p3.4

mov p2,r4

setb p3.5

call delay

clr p3.5

ret

data1:

setb p3.4

mov p2,r3

setb p3.5

call delay

clr p3.5

ret

epr:

setb p3.4

mov p2,r2

setb p3.5

call delay

clr p3.5

ret

conversion:

mov b,#10

div ab

mov r2,b

mov b,#10

div ab

orl a,#30h

mov r4,a

mov a,b

orl a,#30h

mov r3,a

mov a,r2

orl a,#30h

mov r2,a

ret

end

 

Output Image:



Video:

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