The set-up process is very simple, and best understood by referring the wiring diagram. If everything goes right,you should see the burning eye of the red LED when there is no object in the safe-zone ...

To measure wind speed and direction, most people turn the traditional cup anemometer and wind vane. Another less-known method is to use an array of ultrasonic transducers, which doesn’t need … ...

[Mike] is doing a little series that is about DIY smart homes. While these wont turn your house into a Hal 9000 (and hopefully wont try and kill you), they are fun and fairly easy to carry out. Par… ...