This mini Doppler Radar Sensor With Digital Output-RCWL-0516 is equipped with supporting DC 4-28V wide voltage It will automatically continuously output the high level TTL signal when there is motion. 360 degree no blind angle detection and maximum 7m sensing distance. It is perfect for DIY microwave motion sensor light switch, human sensor toys, smart security devices, etc.
The board is for FTDI's popular USB to UART IC. Now with internal oscillator and EEPROM, the FT232RL is an impressive IC.It is open source so driver is available for Windows,Linux and Mac OSX
The module is designed for accurate measurement of humidity and temperature. The sensor is equipped with Si7021 chip with I2C interface, which provides industrial accuracy of measurements.
The chip contains an analog-to-digital signal processing converter, calibration data and an I2C interface.