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paul dunn
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paul dunn

Lightshow Videos  - 
 
need more lights, but here is current setup. 2 raspberries networked, 8 channels on each mirrored, about 3500 lights total
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Tom Enos's profile photo
 
Nice.
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paul dunn

General Discussion  - 
 
Been gone for a while, busy busy. Hope everybody is getting their shows setup. I have about 3/4 of my lights up but it's snowing like crazy.
I'll be setting up my leaping arches this year. also built 3 small trees with tomato cages. will try to get pics soon
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Tom Enos's profile photopaul dunn's profile photoGeoff Grant's profile photo
4 comments
 
Thanks for the info 
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paul dunn

Hardware Discussion  - 
 
scored 20 more Opto22 10amp SSRs for $2.15 each ;-)
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paul dunn's profile photoDaniel D'Amato's profile photo
3 comments
 
Gotta check into some of them. 
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paul dunn

Hardware Discussion  - 
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paul dunn's profile photoCarlton and Melody Cabral's profile photo
2 comments
 
Thanks for the share
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paul dunn

Hardware Discussion  - 
 
Raspberry PI triac driver. Top-trace is the output of the Pi to the MOC3021 opto-isolator, bottom trace is output of the triac. This is a hard-set delay right now as I was trying to get things working. Code is written in C as I could get it to work better vs python. Just need to spend some time now and get the python code optimized to work as well as the C code.
It's fairly jittery due to the OS but seems to work well overall. This was all done on a breadboard with 12v and a car 12v bulb. I can post the schematic and  code if anybody cares to see it.
Note: this type of driver would only work for incandescent lights but would do close to perfect fading as the MOC3021 is non-zero-crossing, but it will be a while before it would all be ready for prime time.
(didn't have my phone with me for a pic, so did a screen dump from the 'scope, then took a pic, hence the paper in photo)
3
Tom Enos's profile photo
 
I would love to see your schematics and code, both the c and the python.
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paul dunn

Hardware Discussion  - 
 
Just so it's recorded somewhere
I slapped this together in ExpressSCH from the datasheet and the schematic I found for an Arduino shield.
This is a type of zero-crossing detector that would be necessary for a Triac driver circuit. U1 is a Vishay H11AA1 Optocoupler.
You could likely replace the 2x 15kohm with a single 33kohm.
when I have a sec, I will add in another optocoupler and a triac. As a side note the H11A1 is about $1.30 and only a single one would be required for a given board
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paul dunn

General Discussion  - 
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Geoff Grant's profile photopaul dunn's profile photo
2 comments
 
You're welcome. If you have tomato cages, these things go together very quickly. My daughter and I had them built in minutes.
Side-note: I did wind up staking them down with tent pegs. They tip over quite easily (at least mine do since those cages came out of the garden and are pretty crooked)
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paul dunn

General Discussion  - 
 
I've been invited to the area Tech Center (at the high school) and will be bringing a lightshow PI setup (along with some high voltage stuff)
hope to get some of the kids interested in the Pi, programming and hardware.
I put my Halloween Helmet back together for today as it's fairly portable. Should be fun. Too bad the school year is almost over. Any of them that have any interest would have to wait until the fall to work on it, if they have to do it in school
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paul dunn's profile photoTom Enos's profile photo
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Teaching is a hard choice.  Two of my sister are accredited, only one is still in the field and she will only do preschool and elementary school.  So I respect what you are doing (more then most people will ever know).

Again hat off to you! 
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paul dunn

General Discussion  - 
 
I've been tapped to play DJ again (DJ Raspberry?) for an elementary school party. Local music store cut me a great deal on a used 10' light truss so I snagged it. Can't have the lights tipping over. ;-)
This is a test run in my shop from last weekend. Using Audio-In mode. Laptop playing music, connected to mixer, CR/phone out goes to Pi for audio-in, then of course main outs to speakers. This time though, I have to be a bit careful, at 600 watts my ears are still ringing ;-)
Lower left is media cart with laptop and case with Raspberry and relays.
Same problem with this setup as at Christmas, not enough lights!
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paul dunn

Lightshow Videos  - 
 
kinda late for this year, but I built a leaping arch today as a test. 5 channels on the arch itself plus the "splashes" at each end. 640 total lights, on an 8' sch40 pvc conduit. Run on its own python program at this point, will think on ways to integrate into LightShow Pi
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Colin Haven's profile photoTall Titan's profile photochris usey's profile photopaul dunn's profile photo
11 comments
 
thanks Chris. Played around with a few different patterns on it, SWMBO & daughter like the one linked in vid the best, I liked a different one. Of course then Murphy's law struck and half of one strand quit. But since it's currently like 10F outside, it will have to wait
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paul dunn

Hardware Discussion  - 
 
Santa will be delivering my present soon: MOC3021 Optoisolators, Q4008L4 Triacs, H11AA1 Optoisolators and TO-220 heatsinks. wheeee!
sorry, just had to tell somebody ;-)
these are going to be for building a triac driver board.
I also put some decade counters on my list, just for fun
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paul dunn's profile photoSean Millar's profile photo
4 comments
 
LOL +paul dunn 
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paul dunn

General Discussion  - 
 
Not that you can tell in the pic, but the lights in the left 2/3s are run from the "master" pi and the lights on the 2nd garage in the right 1/3 are on the "slave" pi.  Total is about 3000 lights (they are not all on in this pic)
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Stephen Burning's profile photoColin Haven's profile photopaul dunn's profile photo
9 comments
 
sure, just realize that the code is still experimental at this point. Only been tested on my setup.
git clone https://PaulDunn@bitbucket.org/PaulDunn/lightshowpi.git
git fetch && git clone dev3
I would recommend doing this on spare SD cards if you have them so you don't mess up your production show
on the "master" pi edit defaults.cfg and in the network section set mode=broadcast, then on slave pi, set mode=slave. Please let me know how it works for you (or doesn't work, as the case may be)
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