I am a new to have a strain gauge, wondering if someone gives me a piece of advice.
As I said, I have no idea how to use it including connecting it with arduino as well as writing a sketch.
What I want to do for this project is simple that measuring a rubber ball (32mm/17g) suspended by a fishing string.
Please see an attached image you will easily understand.
So, I need to know,,,
1, Advise me how to connect an strain gauge to Arduino.
2, Advice or share a reference with me how to write an Arduino sketch.
Here's an idea. Go back to the ebay listing you mentioned, and download the datasheet for the device !
Strain gauges are not particularly easy to deal with, and if you are inexperienced with both Arduinos and
strain gauges, you may need to read very carefully. Their signal level is very low, you also may need
a suitable amplifier.
jremington, michinyon
Thank you very much for sharing great references.
I now understand of a strain gauge how to install on a material, to connect it putting resisters.
Now, it's time to start off an Arduino sketch.
Please give me any sketch book or references how to write?
The signal output of the strain gauge is very low and cannot be measured reliably by an Arduino without additional circuitry. You will need to mount the strain gauge properly, wire it in a resistive divider or Wheatstone bridge circuit and connect that to a suitable amplifier (preferably an instrumentation amplifier).
Once you've verified that this assembly provides a usable signal (a significant voltage difference) in your actual application, then it is time to think about an Arduino sketch.
Two-wire strain gauges are not very sensitive, and quite hard to use. The 4-wire sort (comprising 4 resistive sensors connected in a bridge configuration) are easier to use; but to use them you still need an instrumenation amplifier, or a sensitive differential ADC.
