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Messages - Greg.Ca

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I haven't been to one of these in a while. I'll try to attend.  By Friday night I will post on this forum as whether or not I can attend. Too many projects and hobbies. All of these activities are stretching me to my limit.  THANKS --Greg--

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Looking forward to learning about Lasers. I will be there. --Greg--

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I plan on coming. --Greg--

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I will not be there. It's not the venue, just out of town. --Greg--

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General hardware / How much current is safe in a sealed up strand?
« on: January 23, 2017, 08:48:30 AM »
I am considering purchasing this particular strip:

https://www.aliexpress.com/store/product/4m-DC5V-addressable-WS2812B-led-pixel-srip-waterproof-in-silicon-tube-74pcs-WS2812B-M-with-74pixels/701799_32325613419.html?spm=2114.12010615.0.0.1u9w0b

It is a 4 meter long strip filled up with 5V WS2812b's at 74/meter. There are 296 TOTAL pixels in this strip which is sealed up in a waterproof 'jacket'. That means that there are 3X that amount of 'led's'. 296 X 3=888 total LED's. At 20ma each at full white that is 888 X .02= 17.76 amps/string.

Because these pixels are sealed up in a waterproof jacket, that means that the total number of pixels cannot be added or subtracted to. 296 total pixels in this waterproof jacketed 'strand'.

 I wonder if I even fed power at both sides, Isn't that too much current for those thin little traces in the strand?  Won't that eventually burn out those thin little traces if left on at full white for a period of time? Am I forgetting something or did I do my math wrong? Anything else I'm not considering?

Thanks to my 'pixel' buddies. I'm going to post this on several sites for better coverage and possibly better answers. --Greg--

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The Water Cooler / Re: SURVEY How is your mega tree constructed?
« on: October 19, 2016, 11:46:17 AM »
Ok, Ok, Cliff notes for me. I get it. Sorry for the long 'dribble'. Just wanted to get my point across. I put this same message on three different forums to get a consensus.  Thanks for everybody so far for responding. --Greg--

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The Water Cooler / SURVEY How is your mega tree constructed?
« on: October 18, 2016, 11:22:34 AM »
I tend to think of a mega tree as the 'Center piece' of your Christmas light show. it may have started years ago when Mason Williams had that famous video in which his mega tree 'danced' back & forth with the music from Trans Siberian Orchestra's 'Wizards in Winter' (Still my favorite) with his early LOR show.

Somehow I either read or was told years ago that you needed to go to home depot hardware store and buy one or two 10 foot 1 1/4 steel threaded mast poles. Well that's exactly what I did. For over a decade my mega tree has been propped up with two 10 foot steel threaded 1 1/4 heavy metal steel pipes joined together in the middle with a female-female threaded coupler. This mast pole is extremely heavy and terribly top-heavy making it very difficult to handle. If it starts to tip over, it could easily find it's way into the neighbors living room through one of their large living room windows. YIKES!!!

I worked just fine but over the years but the hook head grew in size to accommodate more lights and the 'star' on top of the mega tree also grew to accommodate more lights. In the past all of this was made of steel and there was one big disadvantage. Yes, you guessed it. WEIGHT! Having large steel structures (hook head and star) on the end of a long heavy steel pole has been increasingly difficult to erect and stand up. It was just a matter of time before a disaster may have happened.  2-3 feet of this monstrous pole slides into a cemented slightly larger 'sleeve' that is always buried under the ground by a few inches. Trying to get the end of this pole to slip into the sleeve has been a difficult task at best because it is just so cumbersome with it being so top heavy.

As time grew my labor force of strong teenage boys dwindled down to zero as my three sons became adults and moved out of the home starting their own lives. They now live thousands of miles away at University in a different state, Coast Guard academy on the east coast and my oldest son is just lazy and useless. He wont help his dad even for money. It is now become impossible to erect this very heavy monstrosity, lift it up from the bottom and fit it into this sleeve. I need either a cherry picker bucket truck to lift it from the top or three more strong helpers.

But alas I have come up with a different solution. If airplanes were made of steel they wouldn't fly yet every airplane flies because they are made with aluminum. Over the years I have had the hook head re-manufactured with aluminum, the large pixel star is made entirely with aluminum and now I am using a aluminum mast pole. To keep strength, I am using a larger size pipe 1 1/2 diameter instead if 1 1/4, and went with a schedule 80 not schedule 40. The difference between schedule 80 vs. schedule 40 is thicker wall diameter. The pole appears much beefier, has a thicker wall diameter and yet it still is 1/3 the weight. Hooray!!!

I really don't know what other people are using to prop up their mega tree for their center pole. So therefore, please let me know how tall your mega tree is, what it is supporting, and what type of props (hook head and star) reside on top of your tree.

 I'm proud to say that this mega tree in the LOR days had 16 strands of 300 count full wave LED's X 8 different colors/strand.  16 X 8 X 300 =38,400 LED's. In the modern pixel world, it will have 64 strands of 240 5V pixels WS2812b pixels (each strand) which I currently in process of constructing all the necessary devices to drive and support this. The Pixel star on the top will also have thousands of 5V pixels.

So far I have seen no negative consequence except for the high cost of having everything built from aluminum. In my real job, I'm paid to over-engineer everything for worse case scenario and have done the same with my Christmas light show.

So, how is your Mega Tree propped up?? Tell me how your mega tree is designed especially the center pole.

Thanks --Greg--

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Greg will be there and possibly showing off toys.

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Events/Gatherings / Re: colorado Light Enthusiast Meet Up on Sept 24
« on: September 14, 2016, 07:28:26 AM »
Can't make this one as I will be out of state. Looking forward to making the next one. Thanks --Greg--

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Events/Gatherings / Re: Colorado Light Enthusiast Meet Up on August 27
« on: August 24, 2016, 12:39:59 PM »
I will be there with my raspberry pi stuff. --Greg Castiglione

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General hardware / Re: Enclosures
« on: July 11, 2016, 04:58:16 PM »
If you want the best enclosures, use Hoffman boxes. Sold by Grainger and Allied electronics here in America. Very expensive  but I primarily buy them used from ebay. Way, Way Way cheaper. Hoffman boxes are used primarily by Industrial facilities and municipalities. I work at a municipality and we use 100% Hoffman enclosures as they are nema 4 rated. No cheap plastic is ever used. 100% very rugged steel. I wouldn't and don't use anything but Hoffman boxes. The big negative is that they are HEAVY and when loaded with numerous power supplies, it takes two men to lift, but they will protect your electronics to the nth degree. --Greg--

http://www.pentairprotect.com/hoffman

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Events/Gatherings / Re: Colorado Light Enthusiast Meet Up on May 28
« on: May 19, 2016, 07:07:07 PM »
Greg will be there with some of his latest 'toys'.

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Events/Gatherings / Re: Colorado Light Enthusiast Meet Up on April 23
« on: April 22, 2016, 03:14:29 PM »
I will be there and will bring my P10 stuff still in boxes unassembled. --Greg--

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Events/Gatherings / Re: Kudos for the Las Vegas Seminar
« on: April 18, 2016, 09:06:52 PM »
You know this is a great hobby when I could be there in person and see all the people I have been conversing with over the past years. My son also took the class over 1000 miles away at his university. We both thank everyone involved in putting this together. We both learned a lot!!  Truly enlightening!! Thanks everybody!!

--Greg--

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The Water Cooler / FS J1Sys P12S
« on: April 11, 2016, 09:39:53 PM »
I have 5 (Yep, Five) J1Sys P12s's that I want to sell. Make offer. I will be in Vegas this upcoming weekend and I could bring them to Vegas if I receive a reasonable offer.

Thanks --Greg--

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