I am trying to do Dave Akerman's project Pi in the Sky (http://www.pi-in-the-sky.com/) for an eighth grade school project. Basically, he sent a raspi up into near space using a weather balloon and took pictures looking downwards. I saw that the board he was selling (http://ava.upuaut.net/store/index.php?r ... uct_id=104) was out of stock, and I was wondering if anyone has any advice for making one. I have access to basic tools such as soldering irons, so that is not a problem. I am also wondering about the purchasing a weather balloon and helium and how much that will cost. Any advice at all would be appreciated.
Thank you for your time,