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/diy/ - Do It Yourself

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>> No.859409 [View]
File: 1.14 MB, 4128x2322, 20150815_002720.jpg [View same] [iqdb] [saucenao] [google]
859409

Can I ask for some advice? I'm trying to teach myself some basics for a simple project, but I can't for the life of me figure out transistors. The transistor here has its pins listed from left to right as B C E and those are 390 ohm resistor. No matter what I try, I can't get the 2nd led to fire. Also, should I connect the arduino and the battery grounds?

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