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 ...

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 ...

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 ...

Some of the best hacks are the ones which seem perfectly obvious in hindsight; a solution to the problem that’s so elegant, you wonder how it never occurred to you before. Of course we also love the ...