Contest #4: Guess what it is?


Hi guys, this is the 4th contest and now you must recognize what this component is, what it does and some applications of it. You can win a $30 Amazon Gift Card if your answer is correct and complete. I will make a draw using the website random.org and select the winning comment. This contest will end on July 30 at 23:59 UTC time!

Update: the winner is Paul A.

Guess

Please use a real email address and name then write your answer something like this:

It is a …
It makes …
It is used in …


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