Please help, accelerometer problem

Projects General Guidance
1

Hello! I have to make this simple project but I have a big problem: the accelerometer in the picture (5 pins, power supply plus the 3 axes) is impossible to find, so I have bought a very common ADXL345 like this one.

Now, my problem is that I don't know how to connect it with the Arduino Uno board. Which accelerometer pins should go to the A0, A2 and A4 arduino pins? Or how do I need to modify the code below in order to use the ADXL345 accelerometer? It should be a minimal change in the code, one that a noob kid is supposed to be able to make.
THANK YOU!

void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
pinMode(A0, INPUT);
pinMode(A2, INPUT);
pinMode(A4, INPUT);
pinMode(12, OUTPUT);
}

void loop() {
// put your main code here, to run repeatedly:
int x = analogRead(A0);
int y = analogRead(A2);
int z = analogRead(A4);

Serial.print("x = ");
Serial.println(x);
/Serial.print("y = ");
Serial.println(y);
Serial.println("z = ");
Serial.println(z);/
delay(1000);

if( x>400)
{
digitalWrite(12,HIGH);
}
else
{
digitalWrite(12,LOW);
}
}

2

I have a big problem: the accelerometer in the picture (5 pins, power supply plus the 3 axes) is impossible to find

The ADXL337 is a chip with 3 analog outputs as the instructable seems to use.

Now, my problem is that I don't know how to connect it with the Arduino Uno board. Which accelerometer pins should go to the A0, A2 and A4 arduino pins? Or how do I need to modify the code below in order to use the ADXL345 accelerometer?

The ADXL345 is an accelerometer with digital output, so it cannot be used with the posted code.

3

Thank you very much, now I see. Then could somebody please help me with a few code lines to be added to the code below? I have tested it and it works fine, I just need to trigger the pin 12 (a buzzer) when the ADXL345 records vibrations.
Thank you!

#include <Wire.h>  
#define Register_ID 0
#define Register_2D 0x2D
#define Register_X0 0x32
#define Register_X1 0x33
#define Register_Y0 0x34
#define Register_Y1 0x35
#define Register_Z0 0x36
#define Register_Z1 0x37
int ADXAddress = 0x53;  //I2C address
int reading = 0;
int val = 0;
int X0,X1,X_out;
int Y0,Y1,Y_out;
int Z1,Z0,Z_out;
double Xg,Yg,Zg;

void setup()
{
Serial.begin(9600);
delay(100);
Wire.begin(); 
delay(100);
Wire.beginTransmission(ADXAddress);
Wire.write(Register_2D);
Wire.write(8);
Wire.endTransmission();
Serial.println("Accelerometer Test ");
} 
void loop()
{
Wire.beginTransmission(ADXAddress);
Wire.write(Register_X0);
Wire.write(Register_X1);
Wire.endTransmission();
Wire.requestFrom(ADXAddress,2);
if(Wire.available()<=2);
{
  X0 = Wire.read();
  X1 = Wire.read();
  X1 = X1<<8;
  X_out = X0+X1;
} 
Wire.beginTransmission(ADXAddress);
Wire.write(Register_Y0);
Wire.write(Register_Y1);
Wire.endTransmission();
Wire.requestFrom(ADXAddress,2);
if(Wire.available()<=2);
{
  Y0 = Wire.read();
  Y1 = Wire.read();
  Y1 = Y1<<8;
  Y_out = Y0+Y1;
} 
Wire.beginTransmission(ADXAddress);
Wire.write(Register_Z0);
Wire.write(Register_Z1);
Wire.endTransmission();
Wire.requestFrom(ADXAddress,2);
if(Wire.available()<=2);
{
  Z0 = Wire.read();
  Z1 = Wire.read();
  Z1 = Z1<<8;
  Z_out = Z0+Z1;
} 
Xg = X_out/256.00;
Yg = Y_out/256.00;
Zg = Z_out/256.00;
Serial.print("X=");
Serial.print(Xg);
Serial.print("\tY=");
Serial.print(Yg);
Serial.print("\tZ=");
Serial.println(Zg);
delay(300);  
}

http://wiki.sunfounder.cc/index.php?title=Digital_Accelerometer_ADXL345_Module

4

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