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    EIT / FE test, anyone taken it?

    how hard is the EIT / FE test? is it a good idea to take it?
  2. B

    Transistors (BJTs) confusion

    Hi all, I hope you guys can help me with my confusions here: 1) I don't understand the usage of transistors as switches. Why would you use transistors as switches, and how does that work?? 2) Why would you choose a PNP over an NPN transistor. I've been reading this book and I don't...
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