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Thread: DIGWDF Store Announcement

  1. #221
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    Default Re: DIGWDF Store Announcement

    Haven't had time to do much more than this tonite, but here's what RenBuss basics look like when they're plugged together... Assembly time was about a half-hour...

    Attached Images Attached Images

    http://digwdf.org/store/
    Even though the DIGWDF Store has been closed for two years, it's still awesome!
    User guides, documentation and other files are still free and available for downloading.

  2. #222
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    Default Re: DIGWDF Store Announcement

    Pretty slick!
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  3. #223
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    Default Re: DIGWDF Store Announcement

    Quote Originally Posted by Jrd View Post
    Pretty slick!
    I think that's just Mr. Nerkle's engineer's drool...
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  4. #224
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    Default Re: DIGWDF Store Announcement

    Quote Originally Posted by CaptKirk View Post
    I think that's just Mr. Nerkle's engineer's drool...
    Oh, woops! Well it was green and had black spots in it... Guess I should look more closely next time.

    There's the board! Looks nice!
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  5. #225
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    Default Re: DIGWDF Store Announcement

    Nice and compact,,, looks neat..

  6. #226
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    Default Re: DIGWDF Store Announcement

    Very interesting Sir.
    I like the size. Can we see it with all 4 boards mounted together?
    tweist
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  7. #227
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    Default Re: DIGWDF Store Announcement

    Quote Originally Posted by tweist View Post
    Can we see it with all 4 boards mounted together?
    Yes and no... here are two of the prototype configurations, I suppose you could call them the RenBuss "stack." The prototype RJ45 board does not have a third row of holes for the additional row of header pins to mount on the bottom, which then plugs into the SSR. I've also encounted a vertical space problem in that the fuse with cover on the bottom SSR board is taller than I bargained for and it would require relocation to allow all four to stack together.

    That said, 3 of the 4 is likely the most common configuration and it's amazingly snug. Including the XBee's whip antenna it stands 2-1/2" tall. Four boards together would add another 1/2" to the height and while it might work, I'm thinking that it might be too tall to be very stable and still maintain solid interconnections through all four boards...

    But, that's why we make prototypes! To find out what might work and what might not... Anyway, here's what I have so far. I'm currently working on the driver board, which has been tested to work successfully with up to 150 feet of wire. I'm toying with exactly how I'll provide a ZC signal so that dimming can work acceptably. So instead of providing 5vdc power on the bus, I'm experimenting with providing 5-6 vac on the bus instead. At that low voltage level it doesn't present a shock hazard (personally tested the old fashioned way by touching the wires!) and putting an H11AA1, a small bridge rectifier and capacitor on each controller may be necessary. I could also replace the H11AA1 with a transistor and a couple resistors and the rectifier chip with a row of diodes... so I'm experimenting both ways. Going the chip way would obviously be easier to construct and would only add $1 to the overall cost, so that's probably what I'll do. I think there's enough room on the controller board to fit both in... but the capacitor... hmmmm...
    Attached Images Attached Images
    Last edited by dirknerkle; 09-17-2012 at 12:50 PM. Reason: typos

    http://digwdf.org/store/
    Even though the DIGWDF Store has been closed for two years, it's still awesome!
    User guides, documentation and other files are still free and available for downloading.

  8. #228
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    Default Re: DIGWDF Store Announcement

    Hi Dirk, is it too early to ask about dimming with the 683 chip?

    Brian
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  9. #229
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    Default Re: DIGWDF Store Announcement

    Quote Originally Posted by Skunberg View Post
    Hi Dirk, is it too early to ask about dimming with the 683 chip?

    Brian
    Hi, Brian.

    I haven't had a lot of time to play with the 675's code to do anything at all with dimming. The 683 has pwm built-in so you can use it if you like, but that's not essential -- it all depends on how the code is written. The 675 can do pwm as well and it would work fine for DC-powered LEDs. To dim A/C powered lights as well, the chip has to be aware of the zero cross timing, and pin 4 is already set up as an input pin in the 675 code (if memory serves me right). So it could be used to read a ZC pulse.

    A bigger issue is that there's no circuitry on the 675 controller to generate a ZC since it's line-powered by DC current from an LSD or similar high-output DC power source. In fact, the 675 controller doesn't even touch A/C current at all, so to read it, the controller would require a redesign to do that. It could possibly get it from a custom-designed A/C SSR (that was designed to generate a ZC signal) via a feedback pin as there are 3 unused pins on the 675's output RJ45 jack. But then the 675 controller would no longer be compatible with all SSRs like it is now.

    Conundrums....

    http://digwdf.org/store/
    Even though the DIGWDF Store has been closed for two years, it's still awesome!
    User guides, documentation and other files are still free and available for downloading.

  10. #230
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    Default Re: DIGWDF Store Announcement

    Quote Originally Posted by dirknerkle View Post
    But then the 675 controller would no longer be compatible with all SSRs like it is now.
    It would be if jumpers were used. You would also have the option to not install the extra parts. The code could also be written with Define statements that could be commented out. It could also be written to use ZC if itís there or to ignore it if itís not.

    I donít have a suggestion for the time part though. Unless there is a way to clone you but I donít think the world is ready for that yet.
    It would be if jumpers were used. You would also have the option to not install the extra parts. The code could also be written with Define statements that could be commented out. It could also be written to use ZC if itís there or to ignore it if itís not.

    I donít have a suggestion for the time part though. Unless there is a way to clone you but I donít think the world is ready for that yet.
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