Microwave Doppler Radar Motion Detector Sensor Module Board

The RCWL-9196 IC-equipped Doppler radar microwave motion sensor module is a replacement for a PIR motion sensor such as the HC-SR501/HY-SRF05. When triggered, the output pin switches from a low (0V) to a high (3.3V) state for 2 to 3 seconds before returning to the low state. The module has a maximum detection distance of 7 meters, with adjustable delay time and sensitivity.

The component side of the board should face the detection area for maximum sensitivity, though it can also detect from the back side at a lower sensitivity. No metal objects should be within 1cm of the antenna.

The module operates on a voltage range of 4V to 28V, with 5V to 12V recommended. The typical operating current is 2.8mA, with a maximum of 3mA. The transmitting power is 20mW, with a maximum of 30mW.

The output control is a low level of 0V and a high level of 3.3V. The operating temperature range is -20°C to 80°C, and the storage temperature range is -40°C to 100°C. The dimensions of the module are 35mm x 17mm x 3mm.

The pin definitions are as follows: - 3V3: 3.3V power output, can be used as a reference voltage or as a low-current (less than 100mA) 3.3V power supply - GND: Ground - OUT: Control output; when a moving object is detected, it will output a high level of 3.3V - VIN: 4-28V input voltage - CDS: CDS photodetector output

The C-TM pad regulates the repeat trigger time, with the default (unpopulated) time being 2 seconds. An SMD capacitor mounted here will extend the repeat trigger time. The R-GN pad can be used to reduce the default detection range of 7 meters to 5 meters by adding a 1M resistor. The R-CDS pad is an internal VCC parallel connection with an internal 1M Ohm resistor to the CDS pin (RCWL-9196 pin 9).

The package includes 5 pieces of the RCWL-0516 Microwave Doppler Radar Motion Detector Sensor Module Board, each equipped with an RCWL-9196 chip based on the Doppler microwave induction technology. This module provides better performance than traditional infrared (PIR) detectors, as it is not affected by its surroundings and can operate through glass and other obstructions. It is suitable for various DIY applications, such as microwave motion sensor light switches, security systems, and human sensor toys.

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