Why did nobody tell me…?

Well, several melted microchips, a burnt finger, a bunch of messing about with a multimeter and a lot of googling later, I have a question…

Why did nobody tell me that you need a resistor on the base on a transistor to prevent rather large amounts of current flowing.

Oh well, I guess I’ve learned something for next time – PICs don’t like having 200mA or so pulled through their pins.

2 comments so far

  1. okie on

    you, sir, need the bible

    http://frank.harvard.edu/aoe/

  2. cillian64 on

    It’s funny you should mention that, actually. I have recently acquired just that book, and have spent most of today reading the part on transistors…

    I think for the first time I properly understand them, and have just designed myself a simple preamplifier for my cello.


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