The pitch of a blaring car horn rises as the vehicle approaches and falls as it moves away. That’s the Doppler effect, and it also occurs for electromagnetic radiation, enabling police to catch ...

The integration of microwave photonics into sensor and radar systems has emerged as a transformative approach to achieve high-precision measurements of Doppler frequency shift (DFS) and ...

Last year, I took a look at some mostly low-cost passive infrared (PIR) motion sensor modules. Then recently, I became more aware of cheap microwave radar motion sensor modules. The popular version of ...

Electronics hobbyists, experimenters and constructors of microcontroller project frequently need to measure/detect voltage, current, frequency, temperature and… proximity. Most measure ...

Radar waveforms are classified into three categories based on the bandwidth of operation. With multiple waveforms available for use, such as FMCW and pulse-modulated, it’s imperative to decide on the ...

Ultrasonic flow meters are non-invasive devices that use acoustic vibrations to determine the flow rate of a liquid. There are two types of ultrasonic flow meters – Doppler and transit time. Both ...