Make A Densitometer

[dhany007]

Hi all
Can you guys help me? How do I use the Opt101 sensor and its wiring? I want to make a densitometer with opt101 and white LED 5mm. And the problem is the ADC value of opt101 not stable.I will put this tool in a machine. But the cable distance between Arduino and opt 101 is too far, around 5 meters. And also the distance between the LED and the 5v adapter supply is also far. The source for the LED was originally planned to be taken from Arduino. But I'm afraid that the ADC value will be unstable.

[Paul_KD7HB]

@dhany007

But I'm afraid that the ADC value will be unstable.

So, test it! IF you average several samples you will get a stable value.

[dhany007]

I don't know how opt101's wiring.. And i still confuse with the program

[Paul_KD7HB]

@dhany007

Opt101 sensor

AND we still don't know how you are planning to use the device. The documentation PDF shown several possible ways to use the device as well as the circuit to fit that use.

[johnerrington]

@dhany007

Opt101

opt101.pdf

we need a schematic

How to make a schematic you can post.

When you submit a question on the forum you will usually need to add a schematic (circuit diagram). The tutorial that follows will explain some ways to create a useful image; however lets start by explaining how to add the image to your post. Its easy. Having created the image all you need to do is : Save the image somewhere convenient - maybe your desktop Start your post, and place the cursor (insertion point) where you want the image to be shown; [upload image to forum] 3: click th…

Cable length should not be an issue provided you use screened cable. You can put capacitors across the LED and OPT101 supplies for decoupling.

@dhany007

But I'm afraid that the ADC value will be unstable.

That depends on how you exclude environment light, and on the characteristics of the medium. You can always filter the adc value.

@dhany007

The source for the LED was originally planned to be taken from Arduino.

Depends on how much current you draw.

[TomGeorge]

Hi, @dhany007
Welcome to the forum.

What is the application?
Can you put the controller at the densitometer site and remote wire the controllers output?

What model Arduino are you using?

Have you actually got the sensor?
If so then start experimenting with it and get it to answer your basic queries.

Can you please tell us your electronics, programming, arduino, hardware experience?

Thanks... Tom...

[dhany007]

Hi Tom ^^
Yes i want to make a project to measure optical density in the Sputtering machine.
Is it better use opt101 sensor or Tsl237 sensor? I use arduino uno for the microcontroller and white LED for the light source