But with his long term goal in mind, he also modified the HC-SR04 sensor by removing the on-board pull-up resistor and adding a new one on the connector side to combine the signals.

With the right conditions, this tiny sensor can measure 12 meters If you need to measure a distance, it is tempting to reach for the ubiquitous ultrasonic module like an HC-SR04.

The JSN-SR04T Waterproof Ultrasonic Sensor As well as the familiar ultrasonic ranging module HC-SR04, another one seen on online markets is the JSN-SR04 (and variants). The JSN-SR04 ultrasonic ranging ...