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I've made a circuit board for myself which does something for my cnc plasma cutting table. There seems to be some sparks of interest for it but not at the cost at which I'd "knock one together" for them. I'd therefore have to look at getting them made in quantity at a professional circuit board manufacturer, but have no idea how they work.
Example, when I design a board for myself, I look at what components are available at the right price, then I design my board to suit.
I'm a bit confused though about how the PCB manufacturer chooses the components. They might not have that brand available, or the package is a slightly different size, etc. The board is the easy bit but I don't know how it works with component choice. How do you specify components when you don't know what the manufacturer has available to them, what brand, what quality, etc.
Am I making sense.
Keith.