TV Remote Controller through 8051

This task is utilized to switch the electrical machines remotely utilizing TV remote. It utilizes Philips RC5 convention based remote. The smaller scale controller utilized is of Atmel i.e. at89c2051 of 8051 microcontroller price. I have utilized triacs rather than transfers to switch the AC apparatus because of the reason of exchanging pace of circuit.

• Dotted PC
• 12-0-12 step down transformer
• 1N4007 diode
• LM7805 5V voltage regulator
• 1000uf electrolytic capacitor
• at89c2051 microcontroller
• 20dip IC base
• 11.0592 MHz crystal
• denounce switch
• 10uf electrolytic capacitor
• 33pf ceramic capacitor
• 8.2k resistor
• red led’s
• 1738/1838T/2238 IR receiver modules 
• BC547 NPN transistor
• BT136 triacs
• soldering iron
• soldering wire
• 1K resistors
• RC5 protocol TV remote 
•  8051 kit online India


• some wires and jumpers

Here is the complete circuit diagram for project.

Aggregate this asm record utilizing any 8051 constructing agent program. I have utilized this ASEM-51 constructing agent. It makes .hex document, which we have to transfer to the microcontroller utilizing 8051 software engineer. I have utilized "Top wins Universal Programmer". Checks it here Top win Products. It can be interfaced with such a variety of 8051 development board, eeproms and so forth.

 

 Assembly code for 8051 microcontroller

<p>;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;<br>;                                                          ;

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

$mod51</p><p>VAR1      equ r7                  ;Temporary Variable

TEMP    equ 10H                ;Temp variable

COUNT   equ 11H                ;Count

ADDR    equ 12H                ;Device address

CMD     equ 13H                ;Command

FLIP    bit 00H                ;Flip bit

TOG     bit 01H                ;Temp bit for flip

IR      equ P3.3               ;IR Receiver connected to this pin

SW1     equ P1.0               ;Switch 1 connected here

SW2     equ P1.1               ;Switch 2 connected here

SW3     equ P1.2               ;Switch 3 connected here

SW4     equ P1.3               ;Switch 4 connected here

SW5     equ P1.4               ;Switch 5 connected here

SW6     equ P1.5               ;Switch 6 connected here

SW7     equ P1.6               ;Switch 7 connected here

SW8     equ P1.7               ;Switch 8 connected here

SWport  equ P1                 ;Port at which switches are connected

       

        org 00H                ;Start of prog

        mov SWport,#00H ;switch all relays off!

        mov sp,#50H            ;Stack pointer initialization

        clr TOG                ;Clear temp bit

       

main:

        jb IR,$                ;Wait for first bit

        mov VAR1,#255           ;3.024mS delay

        djnz VAR1,$

        mov VAR1,#255

        djnz VAR1,$

        mov VAR1,#255

        djnz VAR1,$

        mov VAR1,#255

        djnz VAR1,$

        mov VAR1,#255

        djnz VAR1,$

        mov VAR1,#100

        djnz VAR1,$

        mov c,IR               ;Read Flip bit

        mov FLIP,c

        clr A

        mov COUNT,#5           ;Count for address

fadd:

        mov VAR1,#255          ;1.728mS delay for each bit

        djnz VAR1,$

        mov VAR1,#255

        djnz VAR1,$

        mov VAR1,#255

        djnz VAR1,$

        mov VAR1,#4

        djnz VAR1,$

        mov c,IR

        rlc a

        djnz COUNT,fadd

        mov ADDR,A             ;Save the address

        clr a

        mov COUNT,#6           ;Count for Command

fcmd:

        mov VAR1,#255          ;1.728mS Delay for each bit

        djnz VAR1,$

        mov VAR1,#255

        djnz VAR1,$

        mov VAR1,#255

        djnz VAR1,$

        mov VAR1,#4

        djnz VAR1,$

        mov c,IR

        rlc a

        djnz COUNT,fcmd

        mov TEMP,CMD           ;Save the old command

        mov CMD,a              ;Save the new command

        mov a,ADDR             ;Cheack for valid address

        cjne a,#00,nvalid

        mov a,TEMP

        cjne a,CMD,valid       ;Check for valid command

nvalid:

        ljmp main

valid:                         ;Key press check

        clr a

        mov c,FLIP

        rlc a

        mov TEMP,a

        clr a

        mov c,TOG

        rlc a

        cjne a,TEMP,valid1

        sjmp nvalid

valid1:

        mov c,FLIP

        mov TOG,c

        mov a,CMD

        clr c

        cjne a,#1,skip1        ;Check for SW1

        jb SW1,isset1

        setb SW1

        ljmp main

isset1:

        clr SW1

        ljmp main

skip1:

        cjne a,#2,skip2        ;Check for SW2

        jb SW2,isset2

        setb SW2

        ljmp main

isset2:

        clr SW2

        ljmp main

skip2:

        cjne a,#3,skip3        ;Check for SW3

        jb SW3,isset3

        setb SW3

        ljmp main

isset3:

        clr SW3

        ljmp main

skip3:

        cjne a,#4,skip4        ;Check for SW4

        jb SW4,isset4

        setb SW4

        ljmp main

isset4:

        clr SW4

        ljmp main

skip4:

        cjne a,#5,skip5        ;Check for SW5

        jb SW5,isset5

        setb SW5

        ljmp main

isset5:

        clr SW5

        ljmp main

skip5:

        cjne a,#6,skip6        ;Check for SW6

        jb SW6,isset6

        setb SW6

        ljmp main

isset6:

        clr SW6

        ljmp main

skip6:

        cjne a,#7,skip7        ;Check for SW7

        jb SW7,isset7

        setb SW7

        ljmp main

isset7:

        clr SW7

        ljmp main

skip7:

        cjne a,#8,skip8        ;Check for SW8

        jb SW8,isset8

        setb SW8

        ljmp main

isset8:

        clr SW8

        ljmp main

skip8:

        cjne a,#0CH,exit       ;Check for all switches

        mov SWport,#00H

        ljmp main

exit:

        ljmp main</p><p>     

  END 

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