(OT?) making a video. (ping David Jones?)

One of the most noticeable flaws in DIY video is inattention to audio quality. People coughing in the background, crickets chirping, papers rustling on the table surface that supports the/a microphone, etc.

Also, don't be afraid to do the film in several "takes" with a bit of editing afterward. Plan what you intend to show and think about where you can "naturally" insert cuts, etc.

Try to leave the camera stationary; avoid zooms and pans; etc. Consider the amount of light on each shot so the resulting image doesn't appear to get bright, then dark, etc.

A single stationary camera shot quickly gets boring. OTOH, too many cuts can be confusing/unsettling.

Think about what is in the background, etc. -- do you really want that basket of laundry turning up in the shot?

Good luck!

And no backing music please.

More that LED screens are a lot more uniform brightness than the old scan line phosphor TV set. Ideally you do want to genlock the video sync rate to the display but it matters much less with LCD displays.

Remember that to see the laser beam path you will need a trace of smoke or mist in the air.

As someone else pointed out think about what is in the background. A0 sheets of cardboard are useful backdrops for small experiments.

I think Dave uses a professional Tagarno microscope, with hdmi output, excellent:

I watched the video, then went to the site that sells the DIYINHK USB camera. Dave didn't have the camera mounted the same as the manufacturer. I think this would have made the difference in his board to far to focus problem. Dave's video may have increased demand, the price is up to $280.00. Mikek

Well, I'm thinking I could be in the running for worst video of the year. Most of it is me mumbling while something happens on a screen.

If you watch any of it you'll see why I'm not a great teacher. There's a loose connection in my speech centers, and I say, "top" instead of "bottom" or "beamsplitter" instead of "attenuator". (I don't listen to myself as I talk... maybe it's just not enough negative feedback.) So I'm going to have to edit and add more corrections.

The uploaded video was ~200Mb, but youtube processed it, lost a lot of the text on the instruments. And all sorts of terrible scratchy stuff as I drag the tripod around.

Hey it has one view, and I've only sent it to my customer with problems.

I'll see if it helped.

George H.

Oh, the physics of the current/ piezo sweep. There are two cavities in this laser. The internal diode chip itself, and an external cavity, with the grating as mirror. You can sweep the external cavity by changing the grating angle. And the internal cavity by changing the current, (or temperature.. at low freq. current modulation is the same as temperature modulation.) The "phase" is to get these two cavity modes to sit on top of each other.. and travel together.

On a sunny day (Tue, 14 Apr 2015 18:18:38 -0700 (PDT)) it happened George Herold wrote in :

it says this video is private no play that bad huh???

Aha, so YouTube has started implementing their new Draconian policy of shutting off access to all videos whose authors have failed to agree to their new monetization policy.

On a sunny day (15 Apr 2015 04:10:55 -0700) it happened Winfield Hill wrote in :

I dunno about that, when I upload a video there is a menu choice 'public or private', or some more choices? I am happy with youtube, somebody has to pay for those terabyte servers.

Hi Jan, when I left (work) last night it said it was still "processing". I just clicked the "publish" button. I'd appreciate it if someone would let me know if they can view it... (no reason to watch the whole thing.)

George H.

On a sunny day (Wed, 15 Apr 2015 05:32:37 -0700 (PDT)) it happened George Herold wrote in :

It is working now!

OK I can follow what you are doing, was thinking about my 10 MHz rubidium frequency reference and that runs at high temperature. Does temperature have a lot of effect on your setup?

Great. Thanks

Well the wavelength of the diode changes by about 0.25 nm/ C. (that's for big temperature changes.. if you measure the wavelength vs temperature you get a staircase like structure.. with sloped steps.)

Temperature of the Rb cell changes the number of Rb atoms that are in the gas phase in the cell. (Vapor pressure)

George H.

Hey Win Wow, I haven't used usenet forever it seems... someone on twitter pointed m e here. Yes the Tagarno is very nice indeed. Incredible working distance, great zoo m, HDMI monitor output. PITA to capture a full HD 60fps HDMI output for you tube videos though. Most of the time for electronics closeups I use an Opteka x10 macro lens on my Canon HFG30 camera.

Hard to give advice to Harold based on a setup description, you really need to be there. Import stuff for good video is (not in any order):

- Light, lots of light. Indoors *is* a low light environment for almost any camera.

- Audio. Good audio is everything, get close to the mic. People will happil y watch poor video with good audio, but not great video with crap audio.

- Correct colour balance

- Good framing. Don't waste half the frame with your bench or useless stuff .

- Fixed exposure if the image brightness will change a lot during the shot. e.g. bringing a white hand into a dark-object shot. I'm always fixing expo sure between shots.

- Appropriate depth of field. If you view a PCB on an angle for example, sh allow depth of field sucks, most of the board will be out of focus. So in t his instance the better your camera and lens, the worse your PCB shot could look. Shallow depth of field (blurred background) is for wanky Kickstarter videos or talking head shots.

Dave.

me here.

oom, HDMI monitor output. PITA to capture a full HD 60fps HDMI output for y outube videos though.

on my Canon HFG30 camera.

ed to be there.

ny camera.

ily watch poor video with good audio, but not great video with crap audio.

ff.

t. e.g. bringing a white hand into a dark-object shot. I'm always fixing ex posure between shots.

shallow depth of field sucks, most of the board will be out of focus. So in this instance the better your camera and lens, the worse your PCB shot cou ld look. Shallow depth of field (blurred background) is for wanky Kickstart er videos or talking head shots.

Hi Dave, After making lots of mistakes my first time I'll do better if I ever have to do it again.

Do you write yourself a script? I had an outline and sort of a list of video shots I wanted to show...But my dialog just rambles around... A script would have helped me.

George H.