I need to do a small PCB for a school project and need some surface mount components like the multiplexer and voltage regulators used in the ardupilot shield. I am doing a spilt voltage board (3.3 and 5), that needs to use multiple serial inputs from different sensors. Its a automatic titration machine that i am using a atmega 328.
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Except for some exotic stuff, digikey has always had what I need. And on most occasions I get my order within 2 days using just 1st class mail. I live in San Diego. YMMV.
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Andrew.