Experimenting with an Ultrasonic Sensor Connected to an Airspy HF+
Experimenting with an Ultrasonic Sensor Connected to an Airspy HF+ by RTL-SDR.com
https://www.rtl-sdr.com/experimenting-with-an-ultrasonic-sensor-connected-to-an-airspy-hf/ (sourced and republished from RSS feeds)
Software defined radios can have many more applications other than just radio. For example, it’s possible to connect an ultrasonic sensor which outputs a waveform at some frequency above DC directly to the input of an SDR. We can then simply treat the sensor output as an RF signal, and view it in any SDR compatible software that shows us a spectrum. Normally you’d use a microcontroller with ADC to process the output of these sensors, but using an SDR makes visualizing and experimenting with these sensors much easier.