For my next project I have decided to make a companion cube (from the portal story) style thing, screams when it is to cold, to cold, whines when low on power, outputs messages through speaker and lcd display etc. I have not managed to find an article or page that specifically tells me what ranges of voltage to supply for the different power modes. I have managed to gather a few pieces of information on power supply but none of them seem clear to me, the answers may be there and I am missing them, however I have looked for a while now and can not find the answers. My 2 questions are:
1. In 3.3 volt mode, what ranges should I supply externally?
2. In 5 volt mode, what ranges should I supply externally?
Help to either or both questions is greatly appreciated.
1. In 3.3 volt mode, what ranges should I supply externally?
2. In 5 volt mode, what ranges should I supply externally?
Help to either or both questions is greatly appreciated.