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brad2157

Any methods to increase # of lights per channel with DIY Renard SS24

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I am having trouble getting on the DIYC board to post, so I thought I may also find some help here.

I am wondering if there is any way to increase the number of lights I can put on each channel of the Renard SS24 boards without overloading it and blowing the triacs. I plan to have a lot of C9 bulbs on the house for my 2011 display and wanted to try to save as many channels as I can. Otherwise I would have to use up several channels and just program them all to do the same sequences to distribute the load.

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I have a couple of "stock" units and since I use minis, usually only one string per channel, I won't have this issue. But.....

I read someplace that the board designer said 2 amps per channel, as it's limited by trace size on the board. That said, you might be able to increase it by adding thickness to the trace. I don't know how much current carrying capability a layer of solder would add, but you may be able to lay some copper wire into that solder as well.

Check the manufacturer ratings on the triacs; I think it's somewhere around 5 or 6 amps, but don't hold me to that. You can supplement the stock heat sink with additional metal fins, as it's usually the heat build-up that kills those things.

I'm also not sure about the screw terminal current ratings. I think you can safely double the per-channel current to about 4 amps without supplementing those, but again, don't hold me to that.

I don't think of the Renard SS24 as a high current board, just a high density board. You might want to look at some of the other boards to get higher current.

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Couldn't you use the controller to drive higher capacity triacs off-board?

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That would work as well, but it'd mean an external device. That's all dependent on the application.

In a "show and tell" session, one of the guys at Christmas Carolina showed off one of these devices, rated for 40 amps per channel. Only two devices in a large NEMA rated metal box; the box was part of the heat sink.

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