Finally started moving on Balloon flight 3. Actually ordered Styrofoam containers to use as a payload box. I have four, so plenty of chances to mess up. They are taller then I really want, but I can just cut off the top and it will make a nice payload container.
After much soldering and messing up, I have an external battery pack of 4AA's that will power the 5v usb input of the 720p video camera. The whole camera and battery pack weights 427g.
I'll point the camera at a clock tonight and run it until the battery dies. That will tell me how long it will run, the max size of the mov file (it has a 16Gb card). It will also tell me how the camera handles the power dropping out while recording.
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