I've just finished posting a set of detailed construction photos for a 2.6" camera payload using an electronic timer:
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My previous payloads have all used a mechanical servo-and-lever mechanism to activate the camera, which is pretty easy to set up and doesn't require hacking into the camera. But that's too bulky to fit into a 2.6" tube, so I've always used a boxy payload capsule. The timer allows a more streamline tubular payload (a bit heavier than the foam core box though).I had several goals when I designed this payload:
- It had to be quick and easy to access the camera.
- The timer had to be accessible too.
- It had to descend in an upright position, like my other payloads.
- The mirror shroud had to be removable, for easy repair or replacement.
It took me a while to come up with a design that accomplishes these goals, and I'm pleased with the results. I even converted the normally wasted space in the coupler into a bay for a recording altimeter (non-deployment).
The camera and timer can be easily accessed simply by removing four small screws and sliding the full-length coupler tube from the payload airframe.
Any questions or comments, feel free to ask!