RCWL-0516 Microwave Radar Motion Detecting sensor with FREE header pins

A really handy little motion detector sensor that detects motion even behind objects like wooden doors. It can be used with or without a microcontroller and thanks to its onboard voltage regulator it can be supplied with a huge range of voltages from 4V to 28V.

On the rear of the board, you have 3 additional configuration options:

• C-TM: Adjust repeat trigger time (default 2 s). Adding a capacitor will give a longer repeat trigger time.
• R-GN: Detection distance adjustment (default 7 m). Adding a resistor the detection distance will become shorter. If connected with a 1-MΩ resistor, detection range is about 5 m.
• R-CDS: By adding a resistor (in parallel with the internal 1-MΩ resistor), you can change the light detection threshold. Applicable only when a light sensor is soldered in its pads (CDS) on the front of the circuit board (See below). 

Datasheet: https://img.filipeflop.com/files/download/Datasheet_rcwl-0516.pdf

Arduino example: http://www.handsontec.com/dataspecs/sensor/radar-sensor.pdf

How to use video: https://www.youtube.com/watch?v=IJoPkKlxFXA