ALIEN – ALtitude Imaging Entering Near-space

April 5, 2009

Shutter Probes

Filed under: Uncategorized — Tags: , , , , , — Daniel Richman @ 10:51
Shutter Hacking - Annotated

Shutter Hacking - Annotated

Here’s a close up and labeled picture of the shutter. I have actually soldered to this already, and will supply photos in due course, however first I’m going to talk about the pins on the shutter.

We previously reported that shorting A and D resulted in focusing, whereas tying A C and D together resulted in a photo. But I tell you this: Simply tying A and C results in a photo anyway! However, this is not all good news. I discovered, totally by chance, that the use of the semi-press-focus-button is required to bring the camera out of sleep mode. So soldering to all three is required. B still appears to be not connected in any way.

Potential Difference was measured while the camera was on between all the legs.

Between A and C, C was positive by about 0.05V

Between A and D, D was positive by about 0.05V

It would appear that A is the common leg.

I am yet to be decided as to wheter we should use optoisolators or simple transistors. I currently have no optoisolators available and so transisters are easier to set up, simply because I have some. However, optoisolaters are generally a better way to go.

I also have to mention this guide on the UKHAS wiki (even though its a different, but similar, camera), by rharrison, which helped me greatly in hacking the camera (even though its a different model). Thanks again!

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