Noob inventor needs help!! So in college I invented and marketed a simple device, and one of the doctors who promoted my idea called me and now I'm producing a product that he wants. I'm working alone and I just graduated so I need some help! Basically, my device involves having to turn on a green light when these conditions are met: 3 pressure sensors reading at least .5 lbs/in2, and a switch being turned on. In other words, a green light turns on when all three pressure sensors have to be activated while the switch is on. I'm thinking about using 3 transistors in series for each pressure sensor, and a battery + switch + LED on the main line. The pressure sensors need to be flat.. about .5 mm high. This is my first electrical project! I need help. I'm very new to engineering so don't laugh. Where can I get these supplies? Are there pressure sensors that are that flat?