Qtr 8RC reading problem

Other Hardware Sensors
1

Hi,

I have qtr 8rc sensor, But i couldnt read the values from it.

How can I test my sensor? I connected vcc and gnd.

each sensor outputs are connected to a led.

When i pass the white or black thing on sensors, i see nothing change in the leds.

Why?

Also I have tried doing this with ardino. Result was the same. I read values 0 0 0 00 0 00 0 0.

sensor outputs to aurdino digital pins (3-10). I used example codes.

Please help me.....

Thnks

2

Can you supply links/details about the 'Qtr 8RC' and where the example code you used came from.

3

Have you checked with a digital camera that the sensor's IR leds are coming on?

Edit: I have one of those at home which I've never used. Let me test it when I get home tonight. I can't remember if I got the 8A (analog) or 8RC (digital) one though.

4

thanks for reply,

the sensor wbsite is Pololu - QTR-8RC Reflectance Sensor Array

First, I just wanted to test the sensor separate from aurdino,

I connected sensor vcc and gnd, and I put a led to sensor output, when I see the camera sensors was working, I saw the light, but when I pass a white or black material on sensors, I see nothing change on the led.

Second, I tested with aurdino, I used below

https://github.com/pedcremo/projecteIntegral/blob/master/llibreries_arduino/arduino1_ide/PololuQTRSensors/examples/PololuQTRRCExample/PololuQTRRCExample.pde

I've connected 8 pins to aurdino, but I always read 0 0 0 0 0 0 0 0 0, although I pass white and black material on sensors,

Also you can check from that video, what i want to do,

http://www.aldtuning.net/videos/index.php/view/Qx_oDnX4Azw

5

anyone, using the qtrrc sensor in projects ? I am getting crazy about this sensor for one week,

6

when I use the QTRRCRawValuesExample,

I see the values in the picture, I am totally complicated.

VALUES.png
VALUES.png819×533 4.6 KB

20141202_105622.jpg

20141202_105633.jpg

7

What's wrong with those values?

The comments at the top of the sketch says the values are between 0 and 2500, so looks to me like it's working.

8

It doesnt matter what you pass or you dont pass some white or black material, It always shows these values,

The problem is that...

Also normally, I should use readLine, no read!

I get some values with read, but when i use readLine, values are 0 0 0 00 0 0 0 0.

9

bluytt:
It doesnt matter what you pass or you dont pass some white or black material, It always shows these values,

The problem is that...

Also normally, I should use readLine, no read!

I get some values with read, but when i use readLine, values are 0 0 0 00 0 0 0 0.

any outcomes ? I am encountering the same problem.