In this application-based episode, Derek shows how to build a sensor which measures linear motion using mutual inductance. He shows how an LVDT (linear variable displacement transducer) works, and how it is wound around an air-core. He also designs a differential detector circuit using a precision op-amp, and he provides two LTspice simulations which show the drawbacks of using a simple diode vs a precision rectifier, so you can try it out on your own. Discuss the episode and ask Derek questions on the element14 Community! https://bit.ly/3pMdlC8 Engage with the element14 presents team on the element14 Community - suggest builds, find project files and behind the scenes video: https://bit.ly/3tmdewv Visit the element14 Community for more great activities and free hardware: https://bit.ly/3q6YMpu Tech Spotlights: https://bit.ly/3qPrDhM RoadTest and Reviews: https://bit.ly/3pV5Bux Project14: https://bit.ly/31wbnJY #0:00 Welcome to DC to Daylight #0:45 LVDT #4:39 LTspice #8:39 Circuit #9:41 Waveform #11:58 Give Your Feedback #inductance #inductor