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This guy hits all the design concern bullets I can think of, and he writes well. Listen to him.

Also, get some PCB quotes before you try to jump feet-first into learning high-speed design via rapid prototyping. The cheapest boards I've ever ordered were 2 for $80; the last board I made with even the slightest eye to density/PDS/SI I think was 4 for $500. That was a dinky 2"x2" or 3"x3" 4-layer board too, none of the crazy 24 or 32 layers that laptops have.




Where are you getting your boards fabbed? I literally just got back 3 2x3" 4-layer boards with 5mil min trace/spacing from OSH Park for a total of $54 (shipping included).


OSH Park does pooled PCB orders; didn't have time to wait for an order to get together. You can definitely save money if you don't mind waiting up to a month for your board. Although, perhaps as pooled orders have grown in popularity, the delay isn't as bad these days?


They do two 4-layer batches a month, so yeah, the turn around can be nearly a month if your design is ready on, say, the 3rd of the month. I think the do 2-layer board runs every other day now.




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