I am looking to start a kit, I need so far, LEDS, Input audio, power supply, the actual motherboard, the OS to program things. I need to program the leds to blink for certain things, and i need the audio in to record speech to text. Am i missing any components?  So far it is, The pi2/os/audiocard, i am not quite sure what to use for the leds. I dont know where to buy the power supply.