Radar Sensor Interfacing with Arduino

The interfacing of the RCWL0516 doppler Radar sensors  with Arduino nano R3 is shown below. The required components used in this interfacing are; Arduino Nano R3 -1, RCWL0516 Doppler Radar Sensor-1, LED-1 & 220-ohm resistor.

The RCWL-0516 is basically a motion detection sensor. It can recognize motion via doppler microwave technology with the help of walls or other materials. It will be triggered not only by the presence of people but also by other active objects.

The sensor in this project uses microwave Doppler radar technology to identify active objects. So the doppler radar works by transmitting a microwave signal to an object after that monitors the change within the returned signal’s frequency

The pinout RCWL0516 doppler Radar sensors  includes the following

Pin1 (3V3): The regulated output is 3.3V
Pin2 (GND): It is a Ground pin
Pin3 (OUT): This is an output pin that Triggers high if motion is detected.
Pin4 (VIN): The supply voltage ranges from 4 to 28V
CDS: Sensor disable or low input
The difference within the frequency of the received signal can also estimate the velocity of a target with respect to the sensor.

This Radar sensors  module uses an RCWL0516 IC that assists in repeating triggers & a 360-degree detection region without a blind spot. It can identify motion through walls, other materials & includes a 7 meters susceptibility range.

Connect the Arduino to the RCWL-0516 & LED as shown in the above interfacing diagram.

We know that this Radar sensors  provides high output once motion is detected. Here, a CDS pin is used to allow motion detection. Once the code is ready then connect the Arduino board to the system & upload the code. After that, you need to open the serial monitor at a 9600 baud rate & make a few motions before the Radar sensors . So, observe LED & serial monitor.

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