Problem with Buzzer

[Djsarkar]

Hi

I have PIC18F45K80. I am using MPLABX 5.40 and XC8 2.30.

I have written code that supposed to sound the buzzer for 3 seconds and two seconds of silence and then repeat. When I Run code buzzer doesn't give any sound

followed link https://www.thegeekpub.com/wiki/sensor-wiki-ky-012-active-piezo-buzzer-module/

code work fine If I use LED instated buzzer so I don't know what's the problem with buzzer

#define _XTAL_FREQ 8000000
#include <xc.h>
// PIC18F45K80 Configuration Bit Settings
// 'C' source line config statements
// CONFIG1L
#pragma config RETEN = OFF      // VREG Sleep Enable bit (Ultra low-power regulator is Disabled (Controlled by REGSLP bit))
#pragma config INTOSCSEL = HIGH // LF-INTOSC Low-power Enable bit (LF-INTOSC in High-power mode during Sleep)
#pragma config SOSCSEL = HIGH   // SOSC Power Selection and mode Configuration bits (High Power SOSC circuit selected)
#pragma config XINST = OFF       // Extended Instruction Set (Enabled)
// CONFIG1H
#pragma config FOSC = INTIO2    // Oscillator (Internal RC oscillator)
#pragma config PLLCFG = OFF     // PLL x4 Enable bit (Disabled)
#pragma config FCMEN = OFF      // Fail-Safe Clock Monitor (Disabled)
#pragma config IESO = OFF       // Internal External Oscillator Switch Over Mode (Disabled)
// CONFIG2L
#pragma config PWRTEN = OFF     // Power Up Timer (Disabled)
#pragma config BOREN = SBORDIS  // Brown Out Detect (Enabled in hardware, SBOREN disabled)
#pragma config BORV = 3         // Brown-out Reset Voltage bits (1.8V)
#pragma config BORPWR = ZPBORMV // BORMV Power level (ZPBORMV instead of BORMV is selected)
// CONFIG2H
#pragma config WDTEN = OFF      // Watchdog Timer (WDT disabled in hardware; SWDTEN bit disabled)
#pragma config WDTPS = 1048576  // Watchdog Postscaler (1:1048576)
// CONFIG3H
#pragma config CANMX = PORTB    // ECAN Mux bit (ECAN TX and RX pins are located on RB2 and RB3, respectively)
#pragma config MSSPMSK = MSK7   // MSSP address masking (7 Bit address masking mode)
#pragma config MCLRE = ON       // Master Clear Enable (MCLR Enabled, RE3 Disabled)
// CONFIG4L
#pragma config STVREN = ON      // Stack Overflow Reset (Enabled)
#pragma config BBSIZ = BB2K     // Boot Block Size (2K word Boot Block size)
// CONFIG5L
#pragma config CP0 = OFF        // Code Protect 00800-01FFF (Disabled)
#pragma config CP1 = OFF        // Code Protect 02000-03FFF (Disabled)
#pragma config CP2 = OFF        // Code Protect 04000-05FFF (Disabled)
#pragma config CP3 = OFF        // Code Protect 06000-07FFF (Disabled)
// CONFIG5H
#pragma config CPB = OFF        // Code Protect Boot (Disabled)
#pragma config CPD = OFF        // Data EE Read Protect (Disabled)
// CONFIG6L
#pragma config WRT0 = OFF       // Table Write Protect 00800-01FFF (Disabled)
#pragma config WRT1 = OFF       // Table Write Protect 02000-03FFF (Disabled)
#pragma config WRT2 = OFF       // Table Write Protect 04000-05FFF (Disabled)
#pragma config WRT3 = OFF       // Table Write Protect 06000-07FFF (Disabled)
// CONFIG6H
#pragma config WRTC = OFF       // Config. Write Protect (Disabled)
#pragma config WRTB = OFF       // Table Write Protect Boot (Disabled)
#pragma config WRTD = OFF       // Data EE Write Protect (Disabled)
// CONFIG7L
#pragma config EBTR0 = OFF      // Table Read Protect 00800-01FFF (Disabled)
#pragma config EBTR1 = OFF      // Table Read Protect 02000-03FFF (Disabled)
#pragma config EBTR2 = OFF      // Table Read Protect 04000-05FFF (Disabled)
#pragma config EBTR3 = OFF      // Table Read Protect 06000-07FFF (Disabled)
// CONFIG7H
#pragma config EBTRB = OFF      // Table Read Protect Boot (Disabled)


void Port_pins_Initialized (void)
{
    LATA = LATB = LATC = LATD = LATE =  0;
    TRISA = 0b0000000;// all are output, Unused
    TRISB = 0b0000000;// Buzzer connected to B0
    TRISC = 0b0000000;// all are output, Unused
    TRISD = 0b0000000;// 
    TRISE = 0b0000000;// All are output, Unused
  
    ANCON0 = 0; // digital port
    ANCON1 = 0; // digital port
    CM1CON = 0; // Comparator off
    CM2CON = 0; // Comparator off
    ADCON0 = 0; // A/D conversion Disabled
}

void main(void)
{
  Port_pins_Initialized ();
 
    while (1)
    {
        LATBbits.LATB0 = 0;//Buzzer on
        __delay_ms(3000); // Wait for 3 seconds
        
        LATBbits.LATB0 = 1; //Buzzer off
        __delay_ms(2000);  // Wait for 2 seconds

    }
}

 

[danadakk]

Schematic, buzzer part number .....?

Sorry, did not pay attention to you posting part number.

Regards, Dana.

 

[FvM]

Did you connect all three pins? Signal has to be set high to activate the buzzer.

 

[Djsarkar]

Did you connect all three pins? Signal has to be set high to activate the buzzer.

View attachment 164531

first I tried following connection. link show connection
RB0 ----- S
GND ---- sensor GND

then I tried following connection

RB0 ----- S
5V DC -- sensor VCC
Gnd - sensor Ground

But still buzzer is not sounding

 

[hexreader]

First connection bad, second connection good.

Piezo buzzer requires a square wave audio frequency, not a simple high/low

Change both delays to 1 millisecond and you should hear something

Edit - ignore the above - looking at wrong module

Please post pictures of both sides of YOUR board (not internet picture) - some boards are wrongly marked (allegedly)

 

[stenzer]

Hi,

in which way was the LED connected? Anode to RB0 and cathode to GND?

BR

 

[Djsarkar]

First connection bad, second connection good.

Piezo buzzer requires a square wave audio frequency, not a simple high/low

Change both delays to 1 millisecond and you should hear something

Edit - ignore the above - looking at wrong module

Please post pictures of both sides of YOUR board (not internet picture) - some boards are wrongly marked (allegedly)

I have attached two images

--- Updated Oct 4, 2020 ---

Hi,

in which way was the LED connected? Anode to RB0 and cathode to GND?

BR

I am using onboard LED I have attached schematic for LED

 

[stenzer]

I am using onboard LED I have attached schematic for LED

Ok, so the output pin should be configured right (push-pull), although I'm missing a series resistor.

If you have a scope, have a look on the RB0 voltage. If not, skip the turn off of the buzzer and check the voltage on RB0. It should be 5 V permanently, and the buzzer should be turned on. Ensure Vcc is connected to +5 V.

BR

 

[hexreader]

I found conflicting and confusing information on that module

Beyond my understanding - so I will not comment further in case I give bad information

 

[Djsarkar]

If you have a scope, have a look on the RB0 voltage. If not, skip the turn off of the buzzer and check the voltage on RB0. It should be 5 V permanently, and the buzzer should be turned on.

BR

I have done with Multimeter. Voltage on the RB0 is 0V. I never get 5v on RB0 pin

 

[stenzer]

I assume you have tried LATBbits.LATB0 = 0 as well as LATBbits.LATB0 = 1 on its own, by means of not toggle the pin state.

Have you tested RB0 wit the LED or have you used an other pin?

BR

 

[Djsarkar]

I assume you have tried LATBbits.LATB0 = 0 as well as LATBbits.LATB0 = 1 on its own, by means of not toggle the pin state.

Have you tested RB0 wit the LED or have you used an other pin?

BR

I have measured 5v on RB0 pin with LED ? and other pins show 0v

 

[stenzer]

Hi,

I have measured 5v on RB0 pin with LED ? and other pins show 0v

so you tested the LED with RB0 and you measured 5 V at RB0 for this test. Am I correct? If so, you should also be able to measure 5 V when using the buzzer.

To test the buzzer perform following procedure:

(i) Disconnect the sensor and the LED
(ii) Set the RB0 output voltage to 5 V
(iii) Measure this voltage with a multimeter
(iv) Connect the MCU GND with the sensor GND
(v) Connect the voltage supply i.e. 5 V (not RB0) to Vcc of the sensor
(vi) Measure the voltage at Vcc and RB0 with a multimeter. You should measure 5 V on each pin
(vii) Connect the signal pin with RB0

What do you mean with other pins?

BR