Just posted a video. It's my first real effort and, as videos go, rough as a cob -- but I think the information is solid. I have a 15-minute time limit -- trying to fit an informative video into that is kind of like explaining General Relativity with a book of haiku. https://www.youtube.com/watch?v=2elEXcv0AV8 YouTube time limit complex subject, 15 minutes very hard. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Video: What is a PID Controller?
Started by ●May 4, 2016
Reply by ●May 4, 20162016-05-04
On Wed, 04 May 2016 16:48:13 -0500, Tim Wescott <seemywebsite@myfooter.really> wrote:>Just posted a video. It's my first real effort and, as videos go, rough >as a cob -- but I think the information is solid. > >I have a 15-minute time limit -- trying to fit an informative video into >that is kind of like explaining General Relativity with a book of haiku. > >https://www.youtube.com/watch?v=2elEXcv0AV8 > >YouTube time limit >complex subject, 15 minutes >very hard. > >-- > >Tim Wescott >Wescott Design Services >http://www.wescottdesign.comAt first glance it looks a lot better than the vids I've made! Kudos.
Reply by ●May 4, 20162016-05-04
Tim Wescott wrote:> Just posted a video. It's my first real effort and, as videos go, rough > as a cob -- but I think the information is solid. > > I have a 15-minute time limit -- trying to fit an informative video into > that is kind of like explaining General Relativity with a book of haiku. > > https://www.youtube.com/watch?v=2elEXcv0AV8 > > YouTube time limit > complex subject, 15 minutes > very hard. >Nicely done. -- Les Cargill
Reply by ●May 4, 20162016-05-04
On Wed, 04 May 2016 16:48:13 -0500, Tim Wescott <seemywebsite@myfooter.really> wrote:>Just posted a video. It's my first real effort and, as videos go, rough >as a cob -- but I think the information is solid. > >I have a 15-minute time limit -- trying to fit an informative video into >that is kind of like explaining General Relativity with a book of haiku. > >https://www.youtube.com/watch?v=2elEXcv0AV8 > >YouTube time limit >complex subject, 15 minutes >very hard.Well done. Your well spoken, I heard just one heavy sigh before you add the I. 14min seemed to go by quickly. The demo is nice, maybe a Tach display and a angle display. And better lighting, maybe you can shrink your self into a PIP and just show the demo. Cheers
Reply by ●May 4, 20162016-05-04
On Wednesday, May 4, 2016 at 5:48:17 PM UTC-4, Tim Wescott wrote:> Just posted a video. It's my first real effort and, as videos go, rough > as a cob -- but I think the information is solid. > > I have a 15-minute time limit -- trying to fit an informative video into > that is kind of like explaining General Relativity with a book of haiku. > > https://www.youtube.com/watch?v=2elEXcv0AV8why does the fan trainer arm stand straight up when the controller is *not* on? why doesn't it fall? like at frame 220, it is pulled back from what looks like it's a hard stop, but it doesn't drop to the hard stop. is it just the friction forces on the drive train (angle sensor or motor if there is one besides the fan)?
Reply by ●May 4, 20162016-05-04
On Wed, 04 May 2016 16:51:30 -0700, robert bristow-johnson wrote:> On Wednesday, May 4, 2016 at 5:48:17 PM UTC-4, Tim Wescott wrote: >> Just posted a video. It's my first real effort and, as videos go, >> rough as a cob -- but I think the information is solid. >> >> I have a 15-minute time limit -- trying to fit an informative video >> into that is kind of like explaining General Relativity with a book of >> haiku. >> >> https://www.youtube.com/watch?v=2elEXcv0AV8 > > why does the fan trainer arm stand straight up when the controller is > *not* on? why doesn't it fall? like at frame 220, it is pulled back > from what looks like it's a hard stop, but it doesn't drop to the hard > stop. > > is it just the friction forces on the drive train (angle sensor or motor > if there is one besides the fan)?It's balanced, and has a little bit of friction. Mostly it's well balanced. Achieving both, in a mechanism that I could produce cheaply in quantity, was an interesting challenge. Good question. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●May 4, 20162016-05-04
On Wed, 04 May 2016 19:43:26 -0400, Martin Riddle wrote:> On Wed, 04 May 2016 16:48:13 -0500, Tim Wescott > <seemywebsite@myfooter.really> wrote: > >>Just posted a video. It's my first real effort and, as videos go, rough >>as a cob -- but I think the information is solid. >> >>I have a 15-minute time limit -- trying to fit an informative video into >>that is kind of like explaining General Relativity with a book of haiku. >> >>https://www.youtube.com/watch?v=2elEXcv0AV8 >> >>YouTube time limit complex subject, 15 minutes very hard. > > Well done. Your well spoken, I heard just one heavy sigh before you add > the I. 14min seemed to go by quickly. > > The demo is nice, maybe a Tach display and a angle display. > > And better lighting, maybe you can shrink your self into a PIP and just > show the demo.I've been fiddle-farting around with this for ages, starting about a year ago with "what would it take to make professional quality video". Not having infinite money, I didn't go that route. I finally managed to whittle my expectations down to something I could actually _do_. I am partially trying to sell myself here, but better lighting would certainly be a Good Thing -- there's some known cheap ways of doing these, which I'll probably employ next time. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●May 4, 20162016-05-04
On Thu, 05 May 2016 09:07:58 +1000, Clifford Heath wrote:> On 05/05/16 09:57, Tim Wescott wrote: >> On Wed, 04 May 2016 19:43:26 -0400, Martin Riddle wrote: >>> And better lighting, maybe you can shrink your self into a PIP and >>> just show the demo. >> I've been fiddle-farting around with this for ages, starting about a >> year ago with "what would it take to make professional quality video". >> Not having infinite money, I didn't go that route > > If you have (access to) a Mac, I can highly recommend "ScreenFlow". > It can record multiple screens, multiple cameras and audio at the same > time, and provides a really good post editor for mixing down the video, > with slo-mo replays, transitions and many other effects, PIP, etc. > > All for $100. Excellent value, even just for the post facilities (i.e. > even if you never make a recording).I'm using KdenLive for editing, and it's pretty good -- at least, its capabilities are well beyond mine. And at $0, its price is infinitely better. The muy-expensivo camera is my cell phone. It was realizing that I had something ON HAND that would take adequate video that really pushed me over the edge. As for simple recording and editing mistakes, the points that will be different next time are: 1: I'm working off of (essentially) a bunch of slides, and you can see me looking at them as I talk. I certainly don't like the looks of it. 2: There's a number of places where swear words, tongue-twists, and nose- scratching was edited out on-the-fly, causing jumps in the video. Again, they detract from the video. Instead of trying to do the whole video in one take (and failing), I'm going to study _one_ slide, _hide it_, turn the camera on, do _that one slide's worth_ while _looking at the camera_, turn the camera off, repeat until _that slide_ is good enough, turn to the next slide, and repeat until done. Then I'll edit them together with suitable transitions. This presentation had ten slides, so if I do 90 seconds and flub it, I can just stop the camera, take a few deep breaths, and try again. 3: The lighting could be improved. Just a few lamps off screen would have made it better, but I was in "dammit, just get 'er done" mode -- which is why it got done. Not really on the "immediate" list, but room for incremental improvements: 4: The filming spot could be better. That's my very own desk and workbench, just cleaned up for filming. I'll probably stay here for now, possibly with incremental improvements, but if I should happen to get a really strong response I'll make a better spot. 5: I'm doing this entirely on my own. If I can get a camera-wrangler and general coach in here while I'm filming that would help. Fortunately, I have under-employed family members. 6: Editing and closed-captioning, ditto. Unfortunately my general attitude toward new things is "dive in and keep screwing up until you get it right", while my wife and kids' attitude is "no, won't try unless I'll get it perfect". Maybe I can get one or more of them to take classes... -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●May 4, 20162016-05-04
On Wed, 04 May 2016 19:52:57 -0500, Tim Wescott wrote:> On Thu, 05 May 2016 09:07:58 +1000, Clifford Heath wrote: > >> On 05/05/16 09:57, Tim Wescott wrote: >>> On Wed, 04 May 2016 19:43:26 -0400, Martin Riddle wrote: >>>> And better lighting, maybe you can shrink your self into a PIP and >>>> just show the demo. >>> I've been fiddle-farting around with this for ages, starting about a >>> year ago with "what would it take to make professional quality video". >>> Not having infinite money, I didn't go that route >> >> If you have (access to) a Mac, I can highly recommend "ScreenFlow". >> It can record multiple screens, multiple cameras and audio at the same >> time, and provides a really good post editor for mixing down the video, >> with slo-mo replays, transitions and many other effects, PIP, etc. >> >> All for $100. Excellent value, even just for the post facilities (i.e. >> even if you never make a recording). > > I'm using KdenLive for editing, and it's pretty good -- at least, its > capabilities are well beyond mine. And at $0, its price is infinitely > better. > > The muy-expensivo camera is my cell phone. It was realizing that I had > something ON HAND that would take adequate video that really pushed me > over the edge. > > As for simple recording and editing mistakes, the points that will be > different next time are: > > 1: I'm working off of (essentially) a bunch of slides, and you can see > me looking at them as I talk. I certainly don't like the looks of it. > > 2: There's a number of places where swear words, tongue-twists, and > nose- scratching was edited out on-the-fly, causing jumps in the video. > Again, they detract from the video. > > Instead of trying to do the whole video in one take (and failing), I'm > going to study _one_ slide, _hide it_, turn the camera on, do _that one > slide's worth_ while _looking at the camera_, turn the camera off, > repeat until _that slide_ is good enough, turn to the next slide, and > repeat until done. Then I'll edit them together with suitable > transitions. > > This presentation had ten slides, so if I do 90 seconds and flub it, I > can just stop the camera, take a few deep breaths, and try again. > > 3: The lighting could be improved. Just a few lamps off screen would > have made it better, but I was in "dammit, just get 'er done" mode -- > which is why it got done. > > Not really on the "immediate" list, but room for incremental > improvements: > > 4: The filming spot could be better. That's my very own desk and > workbench, just cleaned up for filming. I'll probably stay here for > now, possibly with incremental improvements, but if I should happen to > get a really strong response I'll make a better spot. > > 5: I'm doing this entirely on my own. If I can get a camera-wrangler > and general coach in here while I'm filming that would help. > Fortunately, I have under-employed family members. > > 6: Editing and closed-captioning, ditto. Unfortunately my general > attitude toward new things is "dive in and keep screwing up until you > get it right", while my wife and kids' attitude is "no, won't try unless > I'll get it perfect". Maybe I can get one or more of them to take > classes...Oh, and a quieter @#$% chair. -- Tim Wescott Wescott Design Services http://www.wescottdesign.com
Reply by ●May 5, 20162016-05-05
Tim Wescott <seemywebsite@myfooter.really> writes:> Just posted a video. It's my first real effort and, as videos go, rough > as a cob -- but I think the information is solid. > > I have a 15-minute time limit -- trying to fit an informative video into > that is kind of like explaining General Relativity with a book of haiku. > > https://www.youtube.com/watch?v=2elEXcv0AV8You're just as bald as I am! (Oh, and nice video! :) -- Randy Yates, DSP/Embedded Firmware Developer Digital Signal Labs http://www.digitalsignallabs.com
