Any suggestions for the lowest available operating voltage microcontroller? This is only for "playing" so needs to be able to be programmed and developed for in small volume. Cheap, lowish power, smallish pin count. No great functionality required. Candidates include 16F62x at 2v odd, MSP430(similar). An interesting non-candidate is low voltage mobile Celeron at less than 1 volt (!) but rather too large, expensive and power hungry for what I have in mind. A microcontroller that would run on an expended single cell (0.9v) would be nice. Russell McMahon -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics