Due to heavy demand, there is no stock available at the moment. Ordering now will join the FIFO queue for shipment expected end-April.
A compact anemometer sensitive enough to detect human breath. A refinement of the popular Wind Sensor Rev C, this design incorporates hardware ambient temperature compensation. An accurate temperature reading is made available on the interface. Based on the time-proven "hot-wire" method, this technique excels at low to medium wind speeds. Great for sensing weak indoor air movement, where the spinning cup anemometers are ineffective.
Developed by our colleagues over at Modern Device USA, the design and application details are here.
The PCB is fully assembled and packaged with a loose 5pin male header for soldering ready to mount vertically or horizontally.
Note that you need an additional power feed for the on board regulator that provides the heating current for the sense element (supply 9-12V, the load is ~40mA depending on wind speed).
The logic level voltage (3.3V) used internally is supplied by another regulator on the board, derived from the same power feed.
N.B. Check that your power supply does not exceed 12V when open circuit - this can damage the sensor. Many low-cost power bricks will go over their marked voltage with a low load.
