The module requires both a USB interface and level shifter to interface the 2.8V levels of the module to the 5V Arduino Uno.

If you have made your own then you are part of a very select group indeed, as is [Reed Foster] and his two friends who made a Doppler radar module their final project for MIT’s 6.013 ...

Note that the HFS-DC06 is a Continuous Wave (CW) Doppler Radar module with 360° directivity. It also comes with an output signal processing circuitry to digitally signal whether or not a movement has ...