LOHAN cops a faceful of Raspberry Pi The Low Orbit Helium Assisted Navigator (LOHAN) team is methodically working its way through the installation of the Vulture 2 spaceplane's electronic systems, and having got the Pixhawk autopilot up and running, we were able to turn our attention this week to the onboard Raspberry Pi. LOHAN regulars will know that we use a …
I realize this is too late, but the industry standard in these kinds of cases (or in case of sensors and cameras looking into a vacuum vessel as I normally deal with) is to mount a viewing window for the camera to look through, allowing the camera itself to be removable.
Otherwise, keep up the hard work! I'm looking forward to some actual test flight footage!
Something like the pop-in lenses you can use with LEDs might have worked, if you can find the right size. I'd feel better about the "supersonic airflow" thing if a lens mount suck outside the skin, instead of having a divot in it.
I assume the cabin isn't airtight, so as long as there isn't a partial vacuum inside that may want to go find the epoxy hole to escape through, it's probably OK. The right epoxy can make a great bond to plastic, so it may not be the path of least resistance anyway.
LOHAN is looking as great inside as out.
I'm not sure glueing the lens directly into the body is going to solve that issue. The lens itself could very well still fog up. Not to mention, fog up on the INSIDE of the lens assembly.
Furthermore, you now expose the lens itself and the plastic of the lens housing to the bitter cold of direct exposure to the outside air. Lets hope the thermal stress doesn't break anything.
I know, I sound like a cynical pessimist. I AM.
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We've used the Picam at altitude several times without issue (see http://www.theregister.co.uk/2013/10/11/lohan_picam/ for example), so while comments about potential vulnerabilities are noted, we have no evidence that it won't perform again.
Also, sticking cameras behind glass is a no-no, because of misting. If you're going to send a GoPro up, it has to be with the skeleton back, because if you use the waterproof case, you're just going to get fog.
See Dave Akerman's comment.
I've just started playing with the Pis, and I'm forever having trouble with the SD adaptors. On my first go, I went through three adaptors of the half-dozen I had that didn't work reliably, and out of habit now, I'm forcibly jamming my thumb against the card to make sure it makes contact. And that's not counting the accidently bumped cards that cause their own issues.
I'm not entirely blaming the Pi for this, it's the super-cheap-we-don't-care-if-it-actually-works SD card adaptors that are at fault.
Well, no more, I've ordered a few pIOs, and I'll be done with card problems.
Bloody SD card sockets - my first Pi arrived with the adapter broke. The replacement - same! Reckon same heavy-handed muppet was to blame. Sourcing an identical new one (from alienspec) was the easy bit. Removing the old one was a bastard - lost 3 pads. Tiny bits of single-stranded wire to adjacent resistors fixed. Needed a tin of tramp-juice (see Icon) first to keep my hand steady enough. Didn't bother sending the second back under warranty - another 6 week wait...Stuck a piece of a credit card on the top, and a bit of thick card to hold.
Yep, if you buy a Pi, buy one of them adapters as a mandatory accessory. Or a new socket and a tin of tramp-juice.
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