Lock-In Thermography On A Cheap IR Camera

Seeing the unseen is one of the great things about using an infrared (IR) camera, and even the cheap-ish ones that plug into a smartphone can dramatically improve your hardware debugging game. But …

Not A Pot, Not An Encoder: Exploring Synchros For Rotational Sensing

We’re all familiar with getting feedback from a rotating shaft, for which we usually employ a potentiometer or encoder. But there’s another device that, while less well-known, has some …

Extreme Espresso, Part 2: An Inductive Water Level Sensor

[Mark Smith] must really, really like his coffee, at least judging by how much effort he’s put into tricking out his espresso machine. This inductive water tank sensor is part of a series of …