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DMX to Analog Converters

Discussion in 'Lighting and Electrics' started by JD, Apr 26, 2007.

  1. JD

    JD Well-Known Member

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    Ok, I'm really about to date myself! I have about 96k in EDI dimmers sitting in my shed. (Bought them around 1978 to1979) They were indestructible, but they used an odd voltage format. (2 to 7.6v) The old boards are long gone, but I pulled them out this last weekend, and the dimmers still work! I remember these things, I don't think anything short of a direct lightning hit would kill them off. It seems a shame to continue to let them rot, but I am at a loss for finding a DMX to analog converter that outputs the old 2-7.6 format. (Plenty of 0-10's out there) I have thought about designing analog converters to change 1-10 to 2-7.6, but only during episodes of dementia. Anybody know of a converter that outputs the old format?

    Thanks!
     
  2. avkid

    avkid Not a New User Fight Leukemia

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    Have you tried Doug Fleenor Design?
    http://www.dfd.com/
    If you call and talk to them they can probably help you. DFD also does custom work.
     
  3. soundlight

    soundlight Well-Known Member

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    If DFD doesn't make the exact converter that you need, you could probably get them to make it for you. They're a pretty small outfit that has cornered a very small market segment and often does custom jobs.
     
  4. gafftaper

    gafftaper Senior Team Senior Team Fight Leukemia

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    if Doug Fleenor can build a DMX coffee pot, he can solve your little problem.
     
  5. soundlight

    soundlight Well-Known Member

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    Coffee pot, shock collar, shoes & music, foot massager, maze, DMX-a-sketch, Coffee Pot MKII, DMXerciser...what will come next? The long list of DFD LDI show gags. The Coffee Pot is the only one that ever caught on, and the shock collar would've if it weren't for certain...yeah, no one would want to work at a place that gave the followspot ops shock collars, and the laws and liability surrounding that are too huge. But, the description is HILARIOUS.
     
  6. gafftaper

    gafftaper Senior Team Senior Team Fight Leukemia

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    I about died when I walked in the restroom at LDI and there was a lifesize cardboard cutout of Doug Fleenor's back side standing at a urinal. Must be a fun place to work.
     
  7. stantonsound

    stantonsound Active Member

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    If not, sell them to me. The first theatre that I worked in had them, and you are right....they just don't build anything like that anymore.
     
  8. farmerjo1111

    farmerjo1111 Member

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  9. soundlight

    soundlight Well-Known Member

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    If that thing can't do it, I don't know what will! Wow.

    Pathway does make very good stuff. We have one of their priority-based DMX I/O switching/merging/splitting/routing boxes that works well. It's used for DMX distro in the studio theater.
     
  10. ScaredOfHeightsLD

    ScaredOfHeightsLD Active Member

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    Hate to do a little hijack here but I have a similar question. I have an old Leprecon LP500 with analog output and a set of DMX dimmers. I know that DFD makes analog to DMX converters but it seems that they have only large quantities of them. I was wondering if anyone knew where I could get just a 12 channel converter. Thanks!
     
  11. JD

    JD Well-Known Member

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  12. soundlight

    soundlight Well-Known Member

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    Unfortunately, the user manual says nothing about DMX protocol. It's called the "DMX 16" because it de-multiplexes 16 channels of NSI "microplex" multiplex protocol. As much as I approve of NSI stuff in many cases, I don't support the Microplex protocol at all, because if you plug a 3-pin DMX cable in to it, you're liable to toast your dimmers, board, or fixtures. This is the major problem with other 3-pin protocols. They often carry a low-voltage power leg in addition to the signal leg so that the control board does not require an external power.
     
  13. JD

    JD Well-Known Member

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    Wow. They are listed as DMX and on the same page as other DMX controllers, but I agree that sub formats can be problematic and "NSI Micro-Plex" does appear in the text. I agree with the concept of staying away from these. As for the original EDI question, I was blown away to find that EDI is still in business! (edionline.com) I figured the company would have folded long ago, or have been bought out by Starbucks and make wall dimmers for coffee shops or something! I emailed them and they replied that all I have to do is ask when placing the order and they will ship their DMX converters to output the 2-7.6v format! (still have yet to get a price, so it may not be the way to go) I am not holding my breath as the one on their site is 48 channels wide. Doug Fleenor may be getting a call yet!
     
  14. soundlight

    soundlight Well-Known Member

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    Yup, EDI is still alive, and they actually have a fairly decent console, the Bijou, and it's got an OK moving light section. You can get a 48/96 model with built in moving light control (with six encoders and a trackball, I think) and 24 subs. Kinda nice.
     
  15. Jezza

    Jezza Active Member

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    I can't say it enough, ULTIMATE CONVERTER. You will be AMAZED at how much that thing can do and how much it will save your ass. Maybe a little pricy, but go into any antiquated theater wanting to use modern gear, and your going to want that thing by your side. I just used one last week and it worked perfectly. Invest!
     
  16. n1ist

    n1ist Well-Known Member Premium Member

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  17. spectraluma

    spectraluma Member

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    Dove systems makes an analog to digital for that voltage.
     
  18. dramatech

    dramatech Well-Known Member

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    There are many options listed above. There is no question that Doug Fleenor is the master of DMX, but if price is important in your consideration, I would look at the Northlight products. James Cart is a one man company that produces DMX to analog, and Analog to DMX. He also produces some great PWM boards that drive LEDs, Dimmer driver boards and relay boards that can be operated from DMX or analog. He also makes a DMX to servo board that is very useful in making a projector douser. In the case of the EDI analog dimmers mentioned, His normal DMX to analog can be 0-10 or there is an adjustment on the board for other voltages. He is very easy to work with on the phone. I have built practically and entire theatre lighting system using his circuit boards. His link is in one of the earlier posts.
     
  19. len

    len Well-Known Member

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  20. derekleffew

    derekleffew Resident Curmudgeon Senior Team Premium Member

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