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Tip31 Transistor alternatives Answered

I teach middle school science, and I'm helping a small group of keen students work on DIY projects.  One of the students wants to try this:

https://www.instructables.com/id/Music-LED-Light-Box/

It calls for a Tip31 Transistor, which is proving difficult to find, at least in Canada.  The comments section suggests at one point that any NPN transistor will do.

Can anyone confirm this?  Or can you suggest more readily available alternatives?

Thanks!

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Downunder35m

3 years ago

If you can't find one of the most common power transistors, seek the datasheet and select a suitable replacement.
Just needs to handle the current and voltage requirements.