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  • ‘Jingle Bells’ – the popular Christmas song was composed by James Pierpont in Massachusetts, America. It was, however, written for thanksgiving and not Christmas.
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  • Outdoor Christmas lights on homes evolved from decorating the traditional Christmas tree and house with candles during the Christmas season. Lighting the tree with small candles dates back to the 17th century and originated in Germany before spreading to Eastern Europe.
  • That big, jolly man in the red suit with a white beard didn’t always look that way. Prior to 1931, Santa was depicted as everything from a tall gaunt man to a spooky-looking elf. He has donned a bishop's robe and a Norse huntsman's animal skin. When Civil War cartoonist Thomas Nast drew Santa Claus for Harper's Weekly in 1862, Santa was a small elflike figure who supported the Union. Nast continued to draw Santa for 30 years, changing the color of his coat from tan to the red he’s known for today.
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JLewinski

Minimum Board Spacing

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In most cases, I believe that most of us use the "one-board-per-enclosure" setup. However, there are times when it is more efficient to put multiple boards in one enclosure, and I have seen MANY wonderful examples right here on PC. One question that I have though, "Is there a MINIMUM distance that one should maintain between the boards?".

Obviously there needs to be enough room to run the wires and cables but I'm concerned (maybe overly concerned :o) with shorting or signal interference between the boards. What about air flow to keep the boards cool? At what point should we start thinking about ventilating the enclosure? Would it ever become necessary to install small computer fans to keep the box cool?

Living in the deep southern tropical regions of the country makes me think about things like this.:cool:

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I don't think you'd ever need fans. (Although I sure someone will post that you could theoretically over heat them without fans.)

I think the only thing you might want to avoid would be orienting them so that the boards are on top of each other. As long as the rising heat isn't heating another board, I think you can jam them in pretty close.

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I have 7 in one large enclosure. With all the cords it is pretty heavy and it looks like I have a substation in the yard with the 126 extension cords connected to it

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You won't have problems with signal interference or shorting (provided they don't actually touch). You *might* have problems with heat buildup, but this depends greatly on how much you load your boards.

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1.25 inches between boards , route cat 5 a few inches away from heavily loaded AC lines (input OR output), need to add cooling or venting anytime ambient temp inside enclosure approaches 65 C...

My motto anyways! ;)

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Cool! (no pun intended... Ok, yes it was!) Yeah, I was thinking there wouldn't be much need to worry, but I figured it would be safer to ask than to just go "jingle-bells to the wall" with this.

65

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Cool! (no pun intended... Ok, yes it was!) Yeah, I was thinking there wouldn't be much need to worry, but I figured it would be safer to ask than to just go "jingle-bells to the wall" with this.

65

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Ive got some boxes that I was hoping to use and put two boards in, they would have to be one on top of the other, although they may be staggered a little, I have to fabricate some way to mount them and hope there not too close.

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I had posted in one of the other threads about using electical breaker boxes for enclosures. I had found several full size boxes at the Habitat For Humanity ReStore for $10 each.. most of the boxes are at least 18" long, btwn 4"-6" deep and have room for at least 4 boards, with 6 or more boards in the bigger boxes). They have busses for mounting, punchouts for the cords.. and a padlock tab to keep anyone out. Since it's metal, outdoor-rated (breaker boxes have to be), it's also a good heatsink. Since it's HfH, it's also tax-deductable.. This really isnt an enclosure post, but just an idea that a bigger box would eliminate any min-spacing/heat problem..

TJ

Edited by skygodtj

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