Brief Introduction

Used for various vibration triggering functions, theft alarm, intelligent car, earthquake alarm, motorcycle alarm, etc.

Compared with the normally open vibration sensor module, this module has a longer vibration triggering time and can drive the relay module

Module features

1. We use the SW-420 normally closed vibration sensor produced by our company,.

2. Comparator output, clean signal, good waveform, strong driving capability, exceeding 15mA

3. Working voltage 3.3V-5V

4. Output format: Digital switch output (0 and 1)

5. Equipped with fixed bolt holes for easy installation

6. Small PCB size: 3.2cm x 1.4cm

7. Using a wide voltage LM393 comparator

Module usage instructions

1. When the product is not vibrating, the vibration switch is in a closed and conductive state, the output terminal outputs a low level, and the green indicator light is on;

2. When the product vibrates, the vibration switch instantly disconnects, the output terminal outputs a high level, and the green indicator light does not light up;

3. The output terminal can be directly connected to the microcontroller to detect high and low levels, thereby detecting whether there is vibration in the environment and playing an alarm role

Microcontroller testing program

/******************************************The

Sensor trigger test

Single chip microcontroller: STC89C52

Baud rate: 9600

Product use: Vibration induction triggering, alarm triggering.

*****************************************/

#include

unsigned char date;

#define uchar unsigned char

#define uint unsigned int

sbit key1=P0^1;

/*Function declaration-----------------------------------------------*/

void delay(uint z);

void Initial_com(void);

//***********************************************************

/*

********************************************************************************

**Function name: delay (uint z)

**Function Function: Delay Function

********************************************************************************

*/

void delay(uint z)

{

uint i,j;

for(i=z;i>0;i--)

for(j=110;j>0;j--);

}

//******************************

//*****Serial port initialization function***********

//******************************

void Initial_com(void)

{

EA=1; // Total Interruption

ES=1; // Allow serial port interruption

ET1=1; // Allow interrupt of timer T1

TMOD=0x20; // Timer T1, interrupt in Mode 2 to generate baud rate

PCON=0x00; // SMOD=0

SCON=0x50; // Method 1: Controlled by Timer

TH1=0xfd; // Set the baud rate to 9600

TL1=0xfd;

TR1=1; // Start timer T1 and run control bit

}

//*************************

//**********Main function*********

//*************************

main()

{

Initial_com();

while(1)

{

if(key1==1)

{

delay(); // Eliminate jitter

If (key1==1)//Confirm triggering

{

SBUF=0X01;

delay(200);

}

}

if(RI)

{

date=SBUF; // Single chip microcontroller accepts

SBUF=date; // Single chip microcontroller sending

RI=0;

}

}

}

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