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    Control Lighting

    How To... ?
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    • DusX
      DusX Tech Staff last edited by

      Sorry I can't say.. I don't haven't had any LED fixtures. I have been controlling lasers and Dimmer packs with incandescent bulbs so far. Just got a LED uv panel but haven't been able to play with it yet.

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      • CitizenJoe
        CitizenJoe last edited by

        You don't need dimmers to cointrol LED fixtures; they plug into the wall and the intensity and colour is controled by the DMX signal. You DO need dimmers to control any type of incandecent fixture including most conventional theatrical fixtures.  The 4 pack dimmers referenced above also plug into the wall, making them very flexible, but you must be careful with your load: max 500 watts per channel, 1800 watts total, all channels combined.  The ones I use have 2 AC plugs (the one above has only one), allowing for twice the load.

        Better quality LED's do provide a smooth fade in/out. It doesn't have anything to do with the LED's themselves, but rather the control circuitry that's built into the fixture.  It's a "you get what you pay for" kind of situatuion.  Also watch out for the native colour temperature of LED's. It can wreak havoc on your artwork.

        Where are you located?  It sounds to me as though you need to engage the services of a lighting designer, or at least a technician, who would be able to advise you...

        Cheers,

        Hugh

        Hugh in Winnipeg - All test machines, Win10/11 Pro, 64 bit, OS SSD and separate data SSD.
        Dell 7560, i9 11950H, 64 gigs, NVIDIA RTX A4000 w/8 GB GDDR6

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        • C
          ckim Beta Platinum last edited by

          Thanks for all the info Hugh.  No doubt I value what lighting designers can bring to the table.  For a project such as this one though, I'd like to be able to go the DIY route, if I can swing it with the help of some tips from those in-the-know. +++C

          MacBookPro,

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          • raha
            raha last edited by

            if you're looking for LED fixtures that fade well, the newest generation of ColorBlasts by Color Kinetics are supposed to be pretty good -- old LED fixtures get really jumpy and bumpy in the lower intensities when fading, but most newer ones have gotten better....

            Leprechaun Dimmer packs are one of the brand names of the ones referred to above -- you can get the kind with two AC plugs on them (but make sure you plug them into two DIFFERENT circuits -- not just the two different outlets on the same circuit! :P )
            a single universe of DMX has 512 channels -- a DIMMER that is controlling a single or a couple of lamps only requires one DMX channel (there is a dip switch or digital addressing method on the dimmer packs that tells it what number of DMX to "listen" for.....so if you give a 4-channel Leprechaun pack the address "1", it will respond to DMX channels 1 through 4. 
            LED lights and automated fixtures require more than a single DMX channel. for example, most typical LED fixtures have RGB -- so the red is on a channel, green on a channel and blue on a channel -- sometimes they also have a separate channel for intensity (these ones are the kinds that would generally fade nicer without affecting colour quality). so once again, a 4-channel LED fixture addressed to "1" will respond to DMX channels 1 - 4 with each channel controlling a single parameter (red, green, blue, or intensity). some moving lights that do lots of stuff (pan, tilt, gobo, rotate, etc....) can take up many channels (24, 36, or even more). so 512 channels of DMX usually goes a far way, unless you're working with many moving lights.
            also keep in mind, that addressing various fixtures the same, will allow you to control them all at once. 
            i don't know a lot about Isadora in the lighting world, but any other lighting specific questions, feel free to throw them my way! :)
            raha

            iMac 2.66 GHz Intel Core i5, 8 GB RAM, OS X 10.7.4, Isadora Core 1.3.25

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            • mark
              mark last edited by

              Raha's points about "jumpy and bumpy" must be emphasized. I bought a cheap-o LED light to do testing with Isadora, and was shocked by the "stair-stepping" as I did a fade. Very ugly!

              Best,
              M

              Media Artist & Creator of Isadora
              Macintosh SE-30, 32 Mb RAM, MacOS 7.6, Dual Floppy Drives

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              • Skulpture
                Skulpture Izzy Guru last edited by

                Thanks for your detailed post @raha.

                As many of you know I have used Isadora for many years now but lighting has always been one area that I know little about. My new job is very keen for basic interactive lighting so I have been reading up about it.

                From what I can gather I need a Entec USB pro and then from that one DMX output I can connect it to 6 lights (daisy chained) and then fade one of the six in and out when one of six videos is chosen.

                So:

                Isadora>Entec>LX1>LX2>LX3>LX4>LX5>LX6

                How does Isadora talk to the Entec box is it serial?

                LX1 - ch1 - 4

                LX2 - ch5 - 8

                LX3 - ch9 - 12 and so on....

                Thanks!

                Graham Thorne | www.grahamthorne.co.uk
                RIG 1: Custom-built PC: Windows 11. Ryzen 7 7700X, RTX3080, 32G DDR5 RAM. 2 x m.2.
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                • DusX
                  DusX Tech Staff last edited by

                  Hi Skulpture
                  You probably will want to use the entec actor found here: http://forum.troikatronix.com/cgi-bin/forum/gforum.cgi?post=9813;search_string=Enttec Lanbox MATRIX;t=search_engine#9813
                  The USB pro uses serial over usb, so you will need to setup a serial connection.
                  With the 1 universe you should be able to chain many lights. 6 for sure. It depends on the nuber of control channels per fixture. If its a rgb led fixture it will likely have 4 channels, 1 for Red, 1 for Blue, 1 for Green, and 1 for Brightness... some will have additional for things like strobe features etc.. in the case of 4 channels per fixture you can connect  over 100 of them to your single universe controller.
                  If all lights are the same then addressing will likely be... Fixture1: ch1 brightness ch 2red 3green 4blue , Fixture2: ch5 brightness ch 6red 7green 8blue , Fixture3: ch9 brightness ch 10red 11green 12blue.
                  Each fixture will have a dip switch that you have to set to its first channel. So Fixture1 will have the dips set to 1 (they are in binary.. often a chart is supplied) Fixture2 dips set to 5 and fixture 3 dips set to 9 etc..

                  Hope this helps.

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                  • Skulpture
                    Skulpture Izzy Guru last edited by

                    That helps a hell of a lot! Thanks.

                    They will be basic spot lights so no RGB (hopefully) just "Warm White" I think they describe it as.
                    I for some reason thought I'd need a dimmer pack or something? I think i'd need one if I was using 240V lights am I right?
                    Cheers again and Ive downloaded the patch. ;-)

                    Graham Thorne | www.grahamthorne.co.uk
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                    RIG 3: Apple Laptop: rMBP i7, 8gig RAM 256 SSD, HD, OS X 10.12.12

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                    • DusX
                      DusX Tech Staff last edited by

                      Dimmer pack.. maybe.. depends on the lights.
                      If they are incandescent and don't have built in DMX dimmers you will need one.
                      The addressing on them is pretty straight forward. Again it would have a Dim to set.. and then usually one dmx channel per output.

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                      • C
                        CraigAlfredson last edited by

                        Please note that the patch found in the old forum doesn't run smoothly on newer releases of Isadora.  Please use the patch attached here which has fixed the problem.  Mark is also working on a fix that will make the old patch work again.

                        Craig

                        b3a12f-enttec-lanbox-matrix-v1.3.izz

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                        • Skulpture
                          Skulpture Izzy Guru last edited by

                          Wow brilliant! Thanks @CraigAlfredso

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                          • DusX
                            DusX Tech Staff last edited by

                            @CraigAlfredson
                            What changes were made? I added a trigger-text actor and a control pulse to the old one and had it running perfectly last weekend.

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                            • DusX
                              DusX Tech Staff last edited by

                              Ah... sorry I should have opened the new patch first.. Looks like you made the same changes.

                              Did anything else get updated?

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                              • C
                                CraigAlfredson last edited by

                                That is the only change from the old one.  Mark is working on some other changes that will hopefully be in an upcoming release.

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                                • Skulpture
                                  Skulpture Izzy Guru last edited by

                                  I have just found this very useful....

                                  [http://www.elationlighting.com/pdffiles/dmx-101-handbook.pdf](http://www.elationlighting.com/pdffiles/dmx-101-handbook.pdf)

                                  Graham Thorne | www.grahamthorne.co.uk
                                  RIG 1: Custom-built PC: Windows 11. Ryzen 7 7700X, RTX3080, 32G DDR5 RAM. 2 x m.2.
                                  RIG 2: Laptop Dell G15: Windows 11, Intel i9 12th Gen. RTX3070ti, 16G RAM (DDR5), 2 x NVME M.2 SSD.
                                  RIG 3: Apple Laptop: rMBP i7, 8gig RAM 256 SSD, HD, OS X 10.12.12

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                                  • DusX
                                    DusX Tech Staff last edited by

                                    @Skulpture
                                    Yeah.. I found that when getting started to. Pretty useful.

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                                    • DusX
                                      DusX Tech Staff last edited by

                                      Hmm... I wonder what Mark could be upto.
                                       Intrigued.

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                                      • Skulpture
                                        Skulpture Izzy Guru last edited by

                                        @dusx huh? confused

                                        Graham Thorne | www.grahamthorne.co.uk
                                        RIG 1: Custom-built PC: Windows 11. Ryzen 7 7700X, RTX3080, 32G DDR5 RAM. 2 x m.2.
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                                        • mark
                                          mark last edited by

                                          Dear Craig,

                                          Given my addled brain, maybe you can remind me what I said I was going to do. ;-)
                                          Best Wishes,
                                          Mark

                                          Media Artist & Creator of Isadora
                                          Macintosh SE-30, 32 Mb RAM, MacOS 7.6, Dual Floppy Drives

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                                          • A
                                            aslelp last edited by

                                            i have just purchased a Enttec DMX USB PRO and some LED, I was planing to test out the setup using isadora ,wondering if anyone got a simple patch i could use?

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