Flexible patch

A project log for No battery NFC air pressure sensor

Measure tire or ball pressure with your smartphone

CaptMcAllisterCaptMcAllister 02/19/2016 at 15:030 Comments

February 19, 2016: I created a flexible patch design that is suitable for lower pressures, and had some prototypes built. These prototypes consist of a Kapton flexible circuit on a PET carrier. The antenna is wound with magnet wire. These work very nicely and they give me a great deal of confidence that I could have higher pressure units created for a low cost and still achieve excellent pressure performance. I would like to make these new patches in higher volume, but the quantity order is too high. I have thought of turning to crowdfunding, but I'd need to know first that people were interested. I posted the original design on Tindie ( for people to sign up for a waitlist for the original revision. If you're interested, please head over and sign up. If I get enough interest, I will look to crowdfund the flexible version.