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how to know which pin is collector ,which is emitter and which is base in a 3 pin phototransistor? Answered

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user
seandogue (author)2011-10-18

There are voltmeters that have transistor checkers built in, which can be used to identify the leads.

The best way, though, is to visit the mfg site and look it up.

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user
iceng (author)2011-10-18

What are your skills ?
Do you have an ohm feature on your meter ?
What is the device number ?

A

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