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Sensors for small objects

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sivamit

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Hi,
I am designing a circuit where I need to know whether the device under test( in my case - it is a very small ic 2x3 mm) is placed on the tester.
How do I detect the presence of the IC? Is there any sensor particularly for that kind of applications?


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S
 

hi..

You can use Infrared sensor to detect any small object
 

An optical detector is a natural choice. A magnifying glass can assist greatly.

It will also help if the device is lighter or darker than the background.

How tall is the device? Could it block a beam of light coming from an led? Shining on a small photodetector?
 

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