Hi! I’m completely new to this whole code thing. I really need to find code to measure Lift in a wind tunnel to see which airfoils would be the most efficient. I have the Aurdino Mega 2650 board, HiLetgo 2pcs PCA9685, ShangHJ 10KG Load Cell, and WWZMDiB SG90 Micro Servo Motor. I have absolutely no clue what i am doing, and if i do end up having to write my own code, i don’t even know where to begin to write it. If anyone has any advice or happens to have pre written code, i would gladly take it. Thank you all!
- Then you need to learn to crawl before you join the marines.
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Well where do i learn to crawl? I just need to find a place where i can learn the basics for this. Then i’ll learn to write the code. but as you said, i need to learn to crawl. so i am trying to find a way i can do that
- You were given a link in post #2
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If I were to tackle a project like this I would first start with the wind tunnel. I am confident the required measurements are doable with an Arduino.
I am not confident a suitable wind tunnel can be made on a hobby scale. Things like length to insure laminar flow. Diameter to be large enough the lift is not effected by the disturbed air flow near the walls etc.
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Hi, @brxxden
Welcome to the forum.
https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum
Is this a school/college/university project?
Thanks.. Tom... 
Is your weight in the 10KG ballpark? And you want enough lift to get to (or near) zero? I'd be concerned that a load cell won't have enough sensitivity for a light load.
Usually, everybody has different hardware and unlike a computer the hardware is not standardized. (You can't just plug-in a display or printer and expect it to work.) So someone else's code probably won't work. (And it's usually harder to modify someone else's code than to start from scratch.)
What are you going to use to connect your airfoil to a sensor? Anything that disturbs the airflow around the airfoil will make your tests invalid.
Interesting project - I don’t recall seeing any wind tunnel discussions here though so you’re unlikely to find any prior art to work from.
I’ll guess too that code will be the least of your worries - a viable physical solution would be where I’d start before trying to instrument anything. Unless this is a high school project perhaps where the results don’t much matter.
The Arduino Blink Without Delay project is where some people start.
Page 13 of BUILD AND TEST AIRFOILS
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Perhaps I misunderstood. I was under the impression you were building an actual physical wind tunnel. The link you posted is for a simulation.
Not trying to be negative, but trying to help. I worked on a product that was tested in wind tunnels and have some basic knowledge that might help.
Do you have a sensor picked out that can measure in 1/100 gram and can be interfaced to your Arduino?
And none of the example tests the OP provided actually use a wind tunnel!
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