I have two small servo and a model sized dc motor, and i wonder if i can control them with my arduino uno with a wifly shield on it. ( and if yes, which components are required to plug them)
sorry for my bad english, thanks in advance.
If they're normal R/C servvos, you can drive them directly from the microcontroller.
The DC motor will require a transistor at least (single direction), or a transistor and DPDT relay (bidirectional) or an H-bridge (solid-state bidirectional).
I think there should be circuits and examples over at the Playground.