Besides helping you test prototypes of your wacky Arduino ideas ... Likewise, ultrasonic and IR modules are indispensable for ...

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 ...

but with a little imagination this can be used for all sorts of projects. For the transmitter, the ultrasonic transducer is simply tied to one of the digital pins on the Arduino. The receiver is a ...