Ok, so Im workin on a project that will have a 12V power supply. Battery sometimes, wall adapter other times. I will have multiple items drawing power at the same time. Some need 12V and some need 5V. The 5V line would be used to charge a cell phone and power a bluetooth reciever. Both require a 5V 1A feed, and I wont be able to use the wall chargers that already feed the 5V. Im lookin to make somethin of my own using a 7805 regulator, instead of paying double for somethin pre built, then paying that again for shipping. Question is, in this application, do I need to use capacitors with the 7805 chip? I know the capacitors smooth the current, but will that be a problem for me? Are either of those components sensitive to noise? If I need the capacitors, I might buy a regulator just to keep things looking clean. Any recomendations on one that feeds 1A? All I can find, feed 3A.