Explore how eddy currents can be used to measure the thickness of thin copper and aluminum foils using low-cost sensors, a PC, and a USB sound card. Discover practical DIY techniques and the science behind this non-contact measurement method.| Circuit Cellar
In the final part of this series, I discuss the generation of JSON and XML files to send sensor data from the web and database servers to web clients. I also cover upgrading the system from HTTP to HTTPS with the use of an Internet web server on a shared web hosting service. Finally, as a complement to backend development for IoT discussed in the series, I present an example of a frontend web page to graphically display sensor data on a web browser.| Circuit Cellar