>But will it run on 3.3V? Or do I need to supply it with 5V, but >will the programming signals exceed the limits then. Off to read >the manual.... rather than reading the manual, read the update document where they fit an LV part to the ICD to allow 3.3V operation. I think it is ETP21 or something like that - there are only two update documents for the ICD, and I suspect you need both as the other one has update info for the programming voltage. -- 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