If you want to play with radar — and who could blame you — you can pretty easily get your hands on something like the automotive radar sensors used for collision avoidance and lane detection. But the ...

What is the HC-SR04? HC-SR04 is an ultrasonic ranging sensor that provides 2 cm to 400 cm non-contact measurement function. Is the HC-SR04 accurate? The ranging accuracy can reach to 3mm and effectual ...

The HC-SR04 sonar modules are available for a mere pittance and, with some coaxing, can do a pretty decent job of helping your robot measure the distance to the nearest wall. But when sellers on eBay ...

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 ...