Capacitive Sensor

Hi… I am doing a project in which I need to display rewards point on the basis of type of material disposed in the bin. So I need the sense materials like plastic, glass, wood, paper etc. So please tell me how can I use capacitive sensor to detect the type of material and display it on any screen? Is capacitive sensor able to display name of material detected?

So please tell me how can I use capacitive sensor to detect the type of material and display it on any screen? Is capacitive sensor able to display name of material detected?

If that would be so easy, automatic recycling of any waste would be much easier than it is in reality.

How much money do you have. Sensors to detect this still have to be designed!

Do have a search of this forum for the exact same question, which comes up time and again.

Answers haven't changed.

Capacitive sensors only senses when something is pressing on it. The only way to do what you describe is to have the people throwing away their garbage self report what it is they are throwing away. So an example scenario would be:

-person throws away plastic
-person presses a button or capacitive sensor that corresponds to plastic
-rewards prints on a display for however many points plastic is worth.

CLK:
-person throws away plastic
-person presses a button or capacitive sensor that corresponds to plastic
-rewards prints on a display for however many points plastic is worth.

Do build in a method of preventing them from adding PVC or other halogenated plastics. Those make the already very hard to recycle mixed plastic fraction even closer to total trash.

I've found some references to research in using pulse-NMR methods for assaying chloride in concrete. Ought to work for PVC detection, no idea how much expense is involved or the energy cost. Common chlorine isotopes are NMR visible.

Energy cost of NMR is probably not much of an issue when you can afford the equipment :slight_smile: