IEEE Spectrum notes a low cost method for getting professional PCB's created.
"This time I discovered BatchPCB.
BatchPCB consolidates a bunch of individual projects onto a single large board and then cuts them apart when they come back from the factory. Small boards can be fabricated for under $20 this way. There’s a three-week turnaround, but I wasn’t in a hurry. I dove into designing my LED dimmer board. ... At BatchPCB, a two-layer board costs $2.50 per square inch (about $0.40 per square centimeter), while a four-layer board costs $8 for the same area (about $1.24/cm2)."
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