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Thread: Martha Stewart "Flicker Free" LED Strings

  1. #16
    Trying to behave here-NOT John's Avatar
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    I really hope that these strings will work OK (and safely) with the controllers. On some of the forums last year, some reported that they worked, but many, many others said they had failures.. Don't know if this years design is the same as last years or not. I don't have any.

    I just buy my LEDs from the one vendor that I personnaly knows stands behind their product.
    John (The Mascot)
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    Shannon,

    Just for reference, I looked at CDIs presale prices from last January.

    C6 Red 50 ct $ 7.50
    C6 Grn 50 ct $ 5.00

    M6 Red 50 ct $ 7.00
    M6 Grn 50 ct $ 8.25

    So many people think CDI Led prices are high. As you can see, with a little advance planning, and buying during the presale, they were actually cheaper then the retail store even with the $4 off deal. And no worries if they would work lol
    John (The Mascot)
    www.tennholidays.com

    480 LOR Channels + 2 CCR + 8 Mighty Minis + 10 Rainbow Floods+ 1 vdrive and vflood, Lynx Express and over 40,000 LEDs

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    Default Re: Martha Stewart "Flicker Free" LED Strings

    Quote Originally Posted by John View Post
    Shannon,

    Just for reference, I looked at CDIs presale prices from last January.

    C6 Red 50 ct $ 7.50
    C6 Grn 50 ct $ 5.00

    M6 Red 50 ct $ 7.00
    M6 Grn 50 ct $ 8.25

    So many people think CDI Led prices are high. As you can see, with a little advance planning, and buying during the presale, they were actually cheaper then the retail store even with the $4 off deal. And no worries if they would work lol
    Yep and that last sentence is what it's all about for me! I already know what I need i'm just waiting on the sale.
    Shannon Wood
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    BUUUUUUUUMMMMMMP

    Hey Denny or Al, found a problem with these Martha's. I got 16 strings of green and put on my spiral tree for testing. They won't dim right. I slapped on a night light and it makes the night light dim exactly like the strings lol. So here is what happens, from 100% to 40% I got no dimming at all, 40 to 2% they dim then off. From 0 to 27% it dims up pretty good then bam full on from there up.

    I bet the Reds will do the same but I could have swore the red set I tested for 3 weeks while my show was running were dimming fine. Anyway if there's anything I can try let me know I got this 7' pvc tree in my dinning room ready to test at a moments notice. LOL
    Shannon Wood
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    That doesn't surprise me Shannon. The Marthas have a specific filter that rolled off if I remember correctly. Denny and I will get together in a couple weeks and look into that. You may need to add more load. Shannon, try adding 2or 3 nightlights and see what happens. Do it outside on concrete. I really don't trust the Marthas using triacs.

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    Default Re: Martha Stewart "Flicker Free" LED Strings

    Man I sure don't want to mess up a controller i may just turn the Marthas on and off until i get some more, (CDI's lol) I'll try it with a couple more snubbers tonight and see what happens, but if this solves the dimming problem do you think it would be safe to use dimming for a show? I'm not worried about the lights just the controllers.
    Shannon Wood
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    That is tough to say. Denny, what were the cap and resistor values for the Martha's?

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    Default Re: Martha Stewart "Flicker Free" LED Strings

    Quote Originally Posted by Al in Raleigh View Post
    You may need to add more load. Shannon, try adding 2or 3 nightlights and see what happens.
    That makes it worse, no dimming. Off or on only LOL.
    Shannon Wood
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    This space for rent. Al in Raleigh's Avatar
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    oh my. The caps are a problem it seems. Shannon, we will address this is a couple weeks for reasons that you know. We may still be able to fix these.
    Likes SWood liked this post

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    Default Re: Martha Stewart "Flicker Free" LED Strings

    Quote Originally Posted by Al in Raleigh View Post
    That is tough to say. Denny, what were the cap and resistor values for the Martha's?
    I will have to search for those schematics that we wrote up. They got piled under somewhere (while the show was up). If we can't fix them, maybe some of you can return them ? We got a reply from the support organization that they were dimmable. and since they are not working correctly .. perhaps they can be returned ? You'd have to have receipts tho .. I am very bad about keeping my Christmas receipts where I can find them Probably because I don't really want to know what I have spent .. :-)
    Thanks,

    Denny Cole
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    I got my receipts and i'll glady return them if there's no fix and send my money to Paul. LoL I don't know if they would be happy with me returning 40 boxes of reds and 40 boxes of geens though. The green ones I have on my spiral tree do look pretty good I just hate to box them back up. Oh well, lesson learned.
    Shannon Wood
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    we may find a cure. When the lab opens again in a week or so, I'll see what we can do. Interesting how resistance worsens the problem.

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    Default Re: Martha Stewart "Flicker Free" LED Strings

    Yeah and the funny part is it makes the night light do the exact same thing, that was one reason I was scared to test it much, it's obviously affecting the controller somehow.
    Shannon Wood
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    Default Re: Martha Stewart "Flicker Free" LED Strings

    With more capacitors and resistors in the circuit, it tends to smooooooth out the swings in voltage. And if you think about it, it will resist dimming as well, since it's trying to resist the changing voltage level. So that's why the night light behaves in a similar manner, the blobs on the string are helping to keep the voltage up while the controller is trying to turn it down.

    Somebody on DIYC suggested adding MORE night lights to the end to see if it drained off the voltage quicker and made the strings dim quicker.

    I'm thinking you'll need to rewire these strings with the diodes in place of the blobs and possibly a current limiting resistor to make it behave more like you want to.
    Mark

    New location - new display. Looking forward to 2015 season!

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    Default Re: Martha Stewart "Flicker Free" LED Strings

    Quote Originally Posted by mschell View Post
    With more capacitors and resistors in the circuit, it tends to smooooooth out the swings in voltage. And if you think about it, it will resist dimming as well, since it's trying to resist the changing voltage level. So that's why the night light behaves in a similar manner, the blobs on the string are helping to keep the voltage up while the controller is trying to turn it down.

    Somebody on DIYC suggested adding MORE night lights to the end to see if it drained off the voltage quicker and made the strings dim quicker.

    I'm thinking you'll need to rewire these strings with the diodes in place of the blobs and possibly a current limiting resistor to make it behave more like you want to.
    I'm thinking find my reciepts and head back to home depot, send my money to CDI while the pre sale is still on!
    Shannon Wood
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