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Thread: New Floodight Board

  1. #11
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    Default Re: New Floodight Board

    Most Excellent ! Great ideas. Can't wait to see pictures of completed and installed boards !

  2. #12
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    Default Re: New Floodight Board

    I will be following this for sure!

  3. #13
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    Default Re: New Floodight Board

    Sounds very interesting!!

  4. #14
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    Default Re: New Floodight Board

    Quote Originally Posted by stampedeboss View Post
    typo on the constant current driver I used, https://www.diodes.com/assets/Datasheets/AL8862.pdf for those interested. What made it work from those available was 60v max and under a buck a piece.
    Very interesting design. I like it. Question though. Your board design looks like the led driver chips are layed out for an SOT89-5 design but the AL8862 pdf says it only comes in SO-8EP design. Am I looking at that wrong?
    Also, what transistor chip is that youíre using in between the ws2811 and the driver?
    Ok, couple questions. Are you relying on a linear voltage regulator to reduce up to 36v to 5v or is there a switching circuit Iím not seeing? Thatís a lot of heat to mitigate.

  5. #15
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    Dec 2013
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    Default Re: New Floodight Board

    Quote Originally Posted by Fanatic View Post
    Very interesting design. I like it. Question though. Your board design looks like the led driver chips are layed out for an SOT89-5 design but the AL8862 pdf says it only comes in SO-8EP design. Am I looking at that wrong?
    Also, what transistor chip is that youíre using in between the ws2811 and the driver?
    Ok, couple questions. Are you relying on a linear voltage regulator to reduce up to 36v to 5v or is there a switching circuit Iím not seeing? Thatís a lot of heat to mitigate.
    Sorry I posted the wrong board layout, it has been updated for the so-8ep, I have also swapped out the linear for a switching circuit. That layout was for a chip with a 40v ceiling and was before I found the AL8862. I was lucky in the math working out that the existing support components still work with the AAL8862. I'm not using a transistors, I'm using a 3 of 4 NAND gates in a tsop8 package. As to the buck to replace the linear I have a couple of choices, I'm initially using the TS30041 based on a couple of factors, price and fewer external components, however it has a ceiling of only 40V but runs under a dollar. 40v is good for everything up to 100w but to reach the targeted 60v I will also use something like the MAX15062A, issue is cost at 2.75+ per chip. I'll post the correct layout once I get back to the computer with the layouts. The connectors will also change in the final board, my design goal was to have a clean bottom so it can sit on the metal floor without issue.

    For those wondering, the 40v versions of the pixiflood using the NAND gate design have been running across the front of my house for the past year without issue. That's 13 10w floods running nights from sundown to sunup. This board is just an attempt to eliminate the need for multiple layouts, while increasing the power handling capabilities going forward. The NAND gates work very well and is a single device and requires a smaller footprint than 3 transistors. The new design is to support the back of my house to provide more powerful lighting around my pool and patio.
    Last edited by stampedeboss; 02-13-2019 at 06:17 AM.

  6. #16
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    Default Re: New Floodight Board

    are the boards coming already assembled, or will there be some DIY involved. also, what is the projected price point?

  7. #17
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    Default Re: New Floodight Board

    One "nice-to-have" feature that I noticed missing from using prior boards, was that the floods lack the signal-amplification (u-Amp, line-driver, f-amp) needed to cascade the data-signal from one floodlight to the next. I don't see that on your current board.

    Can you clarify if this is part of the current board? Would it be possible to add this component to the board?

  8. #18
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    Default Re: New Floodight Board

    Quote Originally Posted by rdj6107 View Post
    are the boards coming already assembled, or will there be some DIY involved. also, what is the projected price point?
    If there is enough interest and I decide to do a group buy both options would be available. That is how I handled it with the pixiflood a couple of years ago. Current design is fully SMD, I've come to believe SMD is as easy; if not easier than through-hole. The key is having a decent hot air machine, and there are some very good ones that aren't too expensive. SMD was used to obtain the smallest footprint possible. There is only one part on the board that is a little tricky and that is the NAND gate, I would do that one regardless if fully assembled or not. None of the other components are smaller than 805.

    Actual cost / Projected cost is hard to gauge without understanding the number of PCBs since it is the most expensive component. If I was to guess, Floodlight only around 6 dollars, adding in the sidecar another 2-3 dollars. That just a wild guess, I lost money on the pixiflood but didn't care at the time. If I do it this time, I intend to break even.

    The design, gerber, and Bill of Materials files will be in github, you are free to have your own boards made or modify to your liking.

  9. #19
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    Default Re: New Floodight Board

    Quote Originally Posted by stampedeboss View Post

    The design, gerber, and Bill of Materials files will be in github, you are free to have your own boards made or modify to your liking.
    I really like this approach--it allows us to tinker (to our likely demise and eventual learning)...

  10. #20
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    Default Re: New Floodight Board

    Quote Originally Posted by Bwinter View Post
    One "nice-to-have" feature that I noticed missing from using prior boards, was that the floods lack the signal-amplification (u-Amp, line-driver, f-amp) needed to cascade the data-signal from one floodlight to the next. I don't see that on your current board.

    Can you clarify if this is part of the current board? Would it be possible to add this component to the board?
    This is a tricky answer, there is a line-driver on the board so the answer is "yes it is part of the board." But its not on the data out signal so the actual answer is "not for that purpose." I am a little confused since I've never had an issue cascading the data-signal, nor has anyone reported an issue with my pixiflood boards. I have 13 in that configuration year round on the front of my house without issue. During Halloween, I've spread them apart as far as 15' without issue as well. Can it be added, yes easily requires the driver, 1 cap and results in extra cost of under a buck. What's other peoples thoughts on the need, how far apart are you thinking?

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