Can anyone give me a rundown of the various licenses that are well-suited to open hardware? I've designed a few circuit boards and would like to make them available for others to use, so I need to choose a license for them.
Things I'm concerned about:
Attribution. Are others required to credit me? If so, how? I know this turned out to be a big issue with some BSD licenses for software.
Commercial use. Can folks copies of my work, or not? I don't really care if they do, but I'd like some credit if so :)
Can others take my work and make "closed" derivatives of it? Similar to #2, but for when people start changing things.
How "strong" is this license? 2 lines made up by a random hacker can constitute a license, but I'd prefer someone with legal training to have looked at it.