Step 6: Finish It Up

Now for the other three types. The NPN circuit to test the pin orientation of ECB is a mirror image of the previous circuit.

The PNP circuits are mirror images of their similar NPN circuits. Just remember to connect the switch and LED to negative voltage. Also remember to place the LED correctly so the the Anode connects with the resistor.

To finish it up add some labels so you never forget where the different type of transistors go.
 
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