hi mu name is peyman
i have a problem in arduino
with which sensor we can undrestand meterials fiber ( like money and ...) using arduino
please help me h dont know any thing aboat it and if you can send me its codes .
please help me
please ..........
please .......

Is this a school project?


If I understand you, you want to distinguish one type of material from another. First, you better identify the full range of materials that you must deal with. Only then can you look for differences that might be somehow detectable. In even simple circumstances, this sounds like a project requiring a lot of sophistication with electronics and physics.