You cannot arbitrarily swap pinouts. It will only work in one configuration. Just because the Radio Shack packaging says one thing doesn't make it right. Sometimes when the vendor prints the drawing they may look at it from the top or the bottom. It will only work one way.

Also be aware that the flat side may or may not be the same on different manufacturers package. An example is the BS170 and the BS170P. The lead configuration is SGD or DGS.

You have the right idea as far as your drawing goes. Look at this page for other suggestions:
http://www/pic101.com/interface.htm

Rick

Matthew Brush wrote:

> Hi all,
>
> Something has been bothering me for a while.  I know there was recently a question posted about transistor pinouts, but I was still left with mixed answers on this.
>
> I have attached a (crappy) drawing I quickly made in photoshop to go with this question.
>
> The package of 2N2222 transistors I bought from RadioShack has pinouts on the back which seem to go against what actually works for me, and is also the opposite of how Eagle Layout wires the transistor (from a schematic->make board).  Eagle wires it the way that is in the picture, which is also how I've been wiring it all along.
>
> It seems these transistor will work in either direction, but as I'm soon to be attempting an audio circuit (as opposed to the usual turning on a relay or whatever), I want to make sure I have it right.
>
> Is this circuit in the attached GIF correct, labelled properly and whatnot?  I would assume that the collector "collects" electricity and when the base is positive, the emmitter "emits" electricity towards ground.  But it seems like I'm getting confused going from the schematic to the actual circuit.
>
> Thanks for any clarification anyone can offer as to why i see these standard NPN transistors wired differently (ie backwards) sometimes and not others.
>
> Peace
>
> MJ Brush
>
> --

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