I think the "fan looking thing" you mentioned is the wheel. I dont have a pic of an internal wastegate. But if you find a pic of a DET stock turbo, you'll see it. Here's a pic of an external one
There are electronic and manual boost controllers. The electronic type send a signal to a seperate unit which you put in the engine bay. That unit actually has a motor in it and depending on the signal it will send a certain amount of pressure through a vacuum line to the wastegate which will control the boost level.