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Chronos User Discussion / Re: Let's talk lighting

« on: September 27, 2017, 10:31:19 AM »

I think you'll be happy, they really are fantastic lights.

And it should be stated that I don't not like their boards. I blew out one board when dinking around one night, so emailed the maker for troubleshooting help. We identified the bad component so I could try to find a replacement locally, and I ordered a second light direct from them. When it arrived, the tech had included a new component in the bag. Wonderful service!

Turns out that the first board ultimately had more problems than just that component (all my fault). So I had one working light, and one dead one.

The only reason I "replaced" their boards is that I already had a few of those converters in the lab and figured it was worth trying to revive the first light. After realizing that it worked just as well with far "simpler" input requirements, I swapped out the second working board as well.

So I have no bad feelings about their boards, and love the support I got. I just happened to go a different route that works better for me with the parts I have.

Stratus LEDs are amazing. Give them money.

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Chronos User Discussion / Re: List of good (and bad) SD cards

« on: September 25, 2017, 04:22:44 PM »

I have a 64GB Sandisk, formatted FAT on a Mac, works fine.

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Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: September 24, 2017, 09:23:02 PM »

Can't stop playing with this thing, fantastic camera!

https://www.youtube.com/watch?v=cbUSwdUVWI8

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Chronos User Discussion / Re: Chronos 1.4 Footage Thread

« on: September 24, 2017, 05:25:22 PM »

Have to do hummingbirds, right? That's like, a rule, or something.

https://www.youtube.com/watch?v=I8fUHfBJg8k

Still think shooting the eggs was my favorite.

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Chronos User Discussion / What will the HDMI output resolution be?

« on: September 23, 2017, 05:39:21 PM »

I'm looking at building a portable external monitor, and most of the screens/drivers do not include scalers. What resolution will be coming out of the HDMI port?

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Chronos User Discussion / Re: Segmented buffer?

« on: September 22, 2017, 08:27:17 PM »

Well damn, that'd be a LOT easier for most people to grasp. It "just works," no options to set.

The key, though, is that as soon as Save is pressed, user is returned to the Record screen. All saving happens behind the scenes, but with a confirmation that the save was successful. Maybe the "Saving" animation spinner disappears or something.

The point of the thread, in my mind, is that saving should not come with such a high cost.

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Chronos User Discussion / Segmented buffer?

« on: September 22, 2017, 06:32:22 PM »

Thinking aloud... User option to split buffer in half (two 4-second buffers, for example)

1) Shoot video to bufferA (invisible to user), Play, Mark in/out, Save
UI returns to record screen
2) Immediately shoot video to bufferB, Play, Mark in/out, Save
3) Shoot again to bufferA, which has since emptied

The user would be able to shoot new (shorter) videos almost constantly, assuming s/he had chosen the Split Buffer option. This would all be transparent to the user, unless bufferA or B was yet unfinished with its save (gray out the Record button, with countdown or nnn% ?)

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Chronos User Discussion / Re: Filming a welder?

« on: September 21, 2017, 04:02:57 PM »

Translation: "Use someone else's camera."

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Chronos User Discussion / Filming a welder?

« on: September 21, 2017, 03:14:02 PM »

With the recent eclipse, we were all inundated with "don't look at the sun" of course, but there were also a lot of warnings about using protective films/filters over camera lenses.

How might the sun relate to a welder? Safe to point the Chronos sensor at such a bright spot?

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Software Dev / Re: Software update V0.2

« on: September 20, 2017, 08:08:38 AM »

Oh I gotcha. I misunderstood, my bad. Depending on the frame rate, flushing the entire buffer could take many minutes, but at least it would have a head start.

I wonder if this would be an opportunity to use a long press of the Record button. Normal press = normal operation. Long press raises a menu of post-trigger options.

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Software Dev / Re: Software update V0.2

« on: September 19, 2017, 10:52:23 PM »

Not sure how that would work, since you still have a max 4 or 8 second record time. At what point would the camera decide, without your interaction, to stop recording and begin flushing the buffer to disk?

Seems that a remote RF trigger would be a good addition to your kit.

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Chronos User Discussion / Re: Let's talk lighting

« on: September 19, 2017, 08:01:47 PM »

Took my two Stratus LEDs, removed their controller boards and replaced them with a couple boost converters:

https://www.amazon.com/gp/product/B019SYX7BM

Because, ya know, what's the worst that can happen?

With the Stratus boards:
Requires 24-28v @ 6-7A+ (for what??)
The lamp gets fed 27v
The fan gets 6v

With the new boards:
Requires 12v @ 2A (much easier to find)
The lamp still gets 27v, pulls 0.8-1A
The fan gets 12v (runs faster, lamp stays cooler)

With two of these lights placed 1m from the subject, I set the Chronos frame rate to 8,000fps, the shutter to 50%, and still had to stop the f1.8 lens down about halfway.

More trials to come, but after running for 30 mins, the heatsinks are cool to the touch, no flicker, and no change in amp draw.

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