8051 interfacing with the buzzer

8051 interfacing with the buzzer

 components:  1) AT89C51 microcontroller

                       2) crystal oscillator

                       3) k1 buzzer

                       4) 4.7k resistor

                      5) 2 pcs 0.01uf capacitor

                      6) 5v power supply

                      7) inverter

Description: this is the post about interfacing microcontroller with a k1 buzzer.

                    pin 40 and 31 is connected to vcc(5v). port 1.5 is connected with

                    a inverter and then to the buzzer.pin 18 and 19 are connected to a crystal oscillator with    ceramic 0.01uf capacitor.

  The buzzer gets turned on when port 2.3 is high.

For resetting the buzzer pin 31 and 3 are connected together with 1uf capacitor and and then connected to ground through 8.2k resistor.

 CODE: 

org 00H

HERE: JNB P2.3,HERE                        ;keep monitoring for high

            SET B P1.5                                 ;set bit P1.5

            CLR P1.5                                    ;make P1.5 low

           SJMP HERE                               ; keep repeating

          END

the code is compiled in keil uvision software.

For any assistance or problem or query comment below.

happy innovention...................................

 

password: circuitsandprogram

download link of complete project: http://d01.megashares.com/dl/zIlpiG7/1

 

 

GLOWING 8 LEDS IN TIME INTERVAL

 

GLOWING 8 LEDS ON TIME INTERVAL

 Circuit :

CODE:

ORG 00H

MOV P0,#00H

MOV A, #0FEH

BACK: MOV P0,A

RLA

A_CALL DELAY

SIMP BACK

DELAY:MOV R2,#08H

LOOP2: MOV R1,#0FFH

LOOP1: MOV R0,#OFFH

LOOP:DJNZ R0,LOOP

DJNZ R1,LOOP1

DJNZ R2,LOOP2

RET

END

The code should be written in keil uvision software and hex code should be compiled and burned to 8051 microcontroller with program burner.

I have used here AT89C51 a microcontroller of  atmel company .

This way you can make a pattern of several leds glowing on a time interval and can use in decorations or for any signal sending device.

For any further assistance if required then comment below.