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Huh, I haven't had Vivado reduce LUT usage after synthesis like this before—at least not drastically like this.
This must be the opt_design stage after synthesis? Or does the placement stage really optimize LUT packing like that?
It's my first timing using “Flow_AreaOptimized_high" and “ExploreArea”. #FPGA #vivado
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Nothing like a little BGA reballing practice to get in the mood for bed. These LTM4630Ys are 1.27 mm pitch with 0.75 mm balls. Easy peasy. These 36A DC-DC modules are also $80 each new.
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Oh. Boy. A lot more init stuff is needed. Well that explains it.
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Well that's kind of frustrating. This LiteDRAM DDR2 controller using sim mode (built-in DRAM model) eats the write transaction, eats the read transaction, and then never responds.
I followed the init_sequence from the generated C code, but I have a hunch more is required.
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It would definitely make it easier to create smaller versions of the SoundSlab grid too. I like this beast, but being modular has advantages!
I can manufacture the individual boards cheaper, or even stuff them at home since the boards would fit in my “reflow oven” *cough* toaster oven.
Also, perhaps someone might want a 4x4 grid for some other fun project.
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This lunchtime's crazy idea: what if I split the SoundSlab grid into smaller 4x4 pieces + two 1x8 columns for control on the sides?
Fitting FFC connectors seemed impossible, but guess what? Vertical FFC connectors exist! A 40 pin vertical FFC connector would fit right between keys on the back.
The boards would have to be mounted flush next to each other, and there's not really room for board-to-board connectors.
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What connectors do people like to use for 12V internal power bussing on their projects? (25-50W ish)
I've been using these PCIe 12V connectors, but they’re kind of chunky. They're super convenient though since I had a pile of cables in the closet, and buying ready-made cables is cheap.
There are tons of nice power connector families out there, but often you have to make the cables…