So I am currently in a middle of doing a research on feasibility of Smart Segregation Bins similar to the one in this video.
but my problem is that i don't know how did he built and coded the aluminum foil capacitive sensor plate and the other sensors. Please help me as my professor keeps on asking on updates about our project but I, the builder and coder of the project, am stuck at the said problem.
Hi, @kelsey_riano
Welcome to the forum.
Please read the post at the start of any forum , entitled "How to use this Forum".
This will help with advice on how to present your code and problems.
The video is pretty comprehensive about the moisture sensor, just two pieces of aluminium foil spaced apart, one piece connected the Arduino Gnd and the other to the A0, analog input pin.
They are not capacitive sensors, but use conduction between the sheets to detect the the WET/DRY material..
Can you please tell us your electronics, programming, arduino, hardware experience?
Have you programmed an Arduino before?
There are quite a few sensors, but this video only concentrates on the WET/DRY decision.
The other sensors are not explained.
I am surprised that it has a "circuit diagram" considering it is a show and not tell video when it comes to code.
When asked for the code, the say Okay, but don't deliver.
You would be better to develop your own, just to get the WET/DRY operation working.
Thanks.. Tom... 
I have only used arduino in robotics class and have only programmed a line follower robot.
But is it still possible to use a aluminum foil capacitive sensor? I found several videos making a aluminum foil capacitive sensor, my only problem is that the board they're using is a microboard and i can only use a arduino uno board.
Hi,
I think you miss the point, capacitive sense will not necessarily be able to tell the difference between WET and DRY material.
That is why the project uses the foil sheets to detect a current through the material..
Dry material will be very little or no current.
Wet material will be a higher current that can be detected.
Do you know Ohms Law?
Tom...
Sorry I don't know ohms law but from what i understand in what you said, can't i just make it so if the ir obstacle detector detects something but the foil doesn't, it would turn the flap the to left. But if the ir obstacle detect something and the foil also detect a current, the flap would turn to the right.
Hi,
Have you been taught anything about the Arduino controller and about electric circuits?
Have you programmed an Arduino before?
Tom...
The caption to the Youtube video says they'll share their code:
in this video we made a dustbin who automatic segregation of dry wet garbage and send SMS to the authority when the dustbin is full
remaining explanation check in the video.....
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If you look in the comments you will find many people asking for code, but not getting it.
From what I can see this channel is another show/tell but don't supply.
Tom...
You need to research how a capacitive sensor works , how it can detect materials etc - the basic principles etc.
The coding for Arduino is largely irrelevant at the stage , you need to be measuring voltages , currents , frequencies and studying sensor design so you can get the feasibility , range of detection , sensitivity etc .
Some reasonable knowledge of electronics is needed- ohms law, reactance, oscillators , how a capacitor works.
Worth researching what others have done too.
The aluminum foil sensor isn't capacitive. It is merely conduction, and OP could simulate it with a potentiometer until OP makes some code work.
Fair enough .. the code is still not the issue , it’s what voltage signals he gets and what they represent that’s important .
It’s too easy to jump into code without getting the basics correct - he needs a mechanically built device and see what signals he gets from it, then decide what to do with them .
sorry i don't really know about electronics as I'm just a beginner, but can you give some ideas for a mechanically built device that i can get signals from, because my thought was shouldn't the device get a signal since wet wastes are moist and moist things are conductive?, sorry again if what im saying is nonsense as i have no clue about electronics making.
What type of sensors do you recommend?
You are doing a research project , you say -that means you have to investigate this stuff , and report your findings .
You will need to gain some knowledge of how these things work if you are to get your marks .
There is no research involved in asking someone which sensor to use and then buying that , job done. The sensing part here is the “new” part of your research , part of YOUR work , not ours.
You will need to explain how your sensing system works , what sensors you looked at and how you made your choice to use a particular technique.
If you are going to the moon you don’t go on a forum and ask someone to choose the rocket for you
Well, this is certainly a very basic project. If you only go as far as the video, then it's a bit of fun but clearly of no serious purpose whatsoever. I seem to recall another recent post with similar broad topic. 
The point is of course, that determining the conductivity of something is easy enough but actually applying it to "garbage" is an entirely different matter. Garbage - as far as I have ever seen - does not come in nice little blocks to place on a sensor and wet garbage is generally very sticky!
Which is to say once you put it on the sensor, part of it will not come off again any time soon!
The point is - the electronics is the dead easy part. 
Just sayin'!
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