Is my gyro dead

Other Hardware Sensors
1

I have a LPR503AL gyro. It is supposed to output an analog signal, but if I use this test sketch I get no reading, that is the values doesn’t change at all when I move the gyro around.

int val_x;
int val_y;

void setup()
{
  Serial.begin(9600);
  pinMode(A0, INPUT);
  pinMode(A5, INPUT);

}

void loop()
{
val_x=analogRead(A0);
val_y=analogRead(A5);
  
Serial.print(val_x);
Serial.print(" - ");
Serial.print(val_y);
Serial.println();
delay(100);
}

Connection to Arduino Uno:

Gyro Arduino
Gnd Gnd
3,3V 3,3V
X output A0
Y output A5

I have tested the analog inputs on the Arduino with a potmeter and they are working like they should (values between 0 and 670)

I haven’t connected the Vref on the gyro which I think is correct according to my google research. I can measure 1,25 volt on the pin which seems right according to the datasheet.

So my question: is the gyro dead or do I do something wrong?

datasheet. http://www.electrozone.dk/9422

2

That breakout board has low and high-pass filters built in on the 1x outputs - are you using the 4x outputs (which should show much more activity)

3

Thanks for your answer MarkT
Unfortunately I get the same result on the 1X and 4X outputs - meaning the output is constant, actually it is 671 which indicate that the output voltage is constant 3,3V

4

Sounds like it's time for some basic tests.
Disconnect the unit from the arduino and apply a nominal 3 volt supply between Vdd and ground.
If you now measure the voltage between either of the x4 outputs and ground (using a digital multimeter) you should get a varying output when you twist/rotate the sensor module.
If the output remains solid at the Vdd level then it looks like you may indeed have a defective unit.

5

Basic test result:
The output from both x and y and 4xX and 4xY outputs are rock steady when I measure the output, it is 3,26V no matter how i rotate and twist.
So i guess its time to go shopping for a new board, I just wonder what went wrong I'm sure i didn't feed it 5V at any time.
Anyway thankyou for the help, and happy newyear

6

One last check - use a magnifying glass to check the board for faults (perhaps a track is broken, solder missing from a joint).