While early scientists and inventors famously underestimated the value of radar, through the lens of history we can see how useful it became. Even though radar uses electromagnetic waves to detect ...

Besides helping you test prototypes of your wacky Arduino ideas ... or another temperature sensor. Likewise, ultrasonic and IR modules are indispensable for robotics projects.

With materials being simple cardboard, aluminum foil, popsicle sticks, some mesh, and a single ultrasonic sensor for harvesting the transmitter and receiver out of, this is the kind of project you ...