This is an Arduino-based Proximity Sensor circuit wired using the popular HC-SR04 Ultrasonic ranging module,used here for non-contact object detection purpose. The HC-SR04 module includes ultrasonic ...

With a standard old HC-SR04 ultrasonic sensor, an audio module and a servo to drive a custom gauge needle he’s made a device which can warn people around you if they’re too close for comfort.

Posted in hardware, home hacks Tagged arduino, oil tank, ultrasonic sensor, xbee ← Hack Your Datasheets Using Datasheet.net A 555-Based, Two-Channel Remote Control Circuit → ...