I worry about how much things cost and how long they will take.  Particularly after reading this excellent post on David L. Jones' EEV Blog on the economics of selling your hardware project.    I want to keep below the 2.5x cost multiplier.  This week I found a tool and service which helps put my worries to rest and is helping with my designs! 

I look over my order on the screen again.  I'm ordering two copies of my board at about $70/board.  I could have spent a few hours and built these boards for a few dollars in-house.  But the vias would also have wires sticking through them, and there would be no solder mask.  


I will have to wait two days for the fab house to make it, then another couple of days for shipping.  Is this worth it?  I look at my component list, which has grown to nearly eighty components.  How will I put it all together?   

I was reading this fascinating account of getting a simple electronic device manufactured, from design and engineering to supply chain and distribution.  I started to get worried.  Everyone talks about their trials and tribulations when outsourcing their components to China - customs holdups, language barriers, holidays, counterfeits.  Why do people go to all the trouble to go to China?  Should I be doing this? 

When I light the Tabata Timer prototype off in my apartment, I wear ear protection.  I worry that the neighbors will complain.  I've gone down to the sub-basement of my building to make measurements.  But still, when I meet with Dave and Anthony for our Monday morning HIIT workout in Washington Square Park, I worry if it will cut through the background noise in the park - trucks, air conditioners, horns, talking, yelling - and whether people will be able to hear it even on the eighth set of burpees.  How to build a loud speaker into a small, battery powered box - that can run forever?