Makers, developers and enthusiasts building distance related projects may be interested to know that the HC-SR04 ultrasonic sonar distance sensor is now available to purchase directly from the ...

If you live in a relatively dry climate, you probably don't worry about underwater hazards during the flood season. If you attend Tsukuba University, Japan however -- just miles from where the ...

Although the idea of a smart, active water tank is more complex and costlier than its passive counterpart, the active type has clear advantages in terms of energy economy and water delivery. To keep ...