Sparks about to fly: Part of the experimental apparatus, showing the sample at the bottom and the counter-sample above it moments before the two come into contact. (Courtesy: Felix Pertl) Static ...

Just about every “getting started with microcontrollers” kit, Arduino or otherwise, includes an ultrasonic distance sensor ...

Abstract: An approach is considered that can be applied to calibrate detectors operating in the analog signal recording mode. Statistical distributions of the readings of such detectors are studied ...