I recently bought one of these to use to read weight going through an Arduino, and I plan to set an alarm off at a certain weight.
My understanding is that I need an amplifier. Which one would work best for this instance (something with just what I need for hooking this one up), and how would a schematic look for plugging this in to be read by the Arduiono? (quick mspaint drawing works haha)
Thanks for the help.
Bump.
I used one of these....
http://www.ledsandchips.com/232
very simple to use, and good for me since I'm allergic to op-amps. Temperamental little blighters.
Fulliautomatix:
I used one of these....
http://www.ledsandchips.com/232very simple to use, and good for me since I'm allergic to op-amps. Temperamental little blighters.
So how would I go about that, what are the three outputs the load cell gives that I have to solder on the module? I found in the comments that "White to 5v, Black to gnd, Red to Input on OpAmp", and to make sure I don't screw up, what are those on the module you gave? I know it's labeled and I believe what would go where but I don't want to screw up anything...
JohnLincoln:
Did you watch the video, on the page you linked us to?They used an AD620.
Another commonly used Instrumentation amplifier is the INA125.
Or you can build your own instrumentation amplifier from 3 op-amps and a few resistors. For convenience you can use 3 out of the 4 amplifiers in a quad op-amp.
This does seem like a more practical way, and less expensive however. How would I go setting up one with the info given of "White to 5v, Black to gnd, Red to Input on OpAmp"? The diagram in the pdf is not as easy to read/understand as someone who is a beginner as the other module Fulliautomatix linked.
So how would I go about that
true, the documentation for this is pretty poor. It's an I2C device so you'll need to use the Wire.h library. There are many I2C devices in arduino-land that are well documented, I suggest you buy and play with one of these devices, that will help to arm you with the knowledge you'll need to get this to work.
I can't really learn play around with other things now. I have to get this project done because it's a school one. Can I get advice on how to hook up this AD260 using the information given please?
Furthermore it is interesting this load cell only has 3 wires as opposed to most cells' 4.
Anyone have experience with the AD260? How to hook one up, or what the specifications on the pdf mean?
READ THE POSTS.
It's AD620, (NOT 260).
FYI,
There is a special HELL reserved for people who don't read datasheets. It's a place where nothing works
and everything smokes when you turn the power on.
and BTW,
The US Navy went to a hell of a lot of trouble to develop the OP AMP. You should try learning something
about them because you can do almost anything with them.
[MK 37 Gun Fire Control System (GFCS)](http://MK 37 Gun Fire Control System (GFCS))
Can anybody tell me how to hide the link behind a word or phrase ?
raschemmel:
READ THE POSTS.
It's AD620, (NOT 260).FYI,
There is a special HELL reserved for people who don't read datasheets. It's a place where nothing works
and everything smokes when you turn the power on.Can anybody tell me how to hide the link behind a word or phrase ?
Yes sorry, it's the AD620. Sorry about that. Also, I have looked at the pdf and just would like to know how the mapping of the amp translates better and how it actually applies with hooking up my one load cell to the Arduino. To my understanding of the diagram, +V is the gnd line coming from load cell and -V is the continuation of that to the Arduino. +In and -In are the inputs, but my load cell only has one ongoing instead of most load cells two. Output, goes to analog pin on Arduino. Should REF just be grounded? Should a 300 ohm resistor be fine between the gain (RG on the pdf) ?
I'll be sure to check out more info once I'm done with this project, those are some cool links, thanks 
Also, their should be a little link icon and you'll be prompted to paste a URL. That's how you do that.