https://blog.udvabony.com/en/Recent content in Home on Udvabony BlogHugoen-USSun, 18 Oct 2026 00:00:00 +0600https://blog.udvabony.com/en/posts/arduino-ultrasonic-distance-meter/Sun, 18 Oct 2026 00:00:00 +0600https://blog.udvabony.com/en/posts/arduino-ultrasonic-distance-meter/<p>By the end of this tutorial you&rsquo;ll have a working <strong>distance meter</strong> built from an <strong>HC-SR04 ultrasonic sensor</strong> and an <strong>Arduino Uno</strong> — it beeps and lights an LED when something comes close. You can get every part from <a href="https://udvabony.com/categories/distance-sensors">Udvabony&rsquo;s distance sensor category</a>.</p> <h2 id="what-youll-need">What you&rsquo;ll need</h2> <p>For this project you need:</p> <ul> <li><strong>Arduino Uno</strong> — the board that runs the code.</li> <li><strong>HC-SR04 ultrasonic sensor</strong> — measures distance.</li> <li><strong>Breadboard and jumper wires</strong> — for the connections.</li> <li><strong>An active buzzer</strong> plus an <strong>LED + resistor</strong> — for the alert.</li> </ul> <p>These parts are all available on Udvabony — <a href="https://udvabony.com/categories/arduino-development">browse the Arduino &amp; development boards</a>:</p>