HC-SR04 Ultrasonic Distance Finder LED Display without Arduino

This project demonstrates how to build a simple yet effective ultrasonic distance measurement device using the HC-SR04 sensor and a dedicated display module, eliminating the need for a microcontroller like an Arduino. This standalone solution is perfect for quick prototyping and applications where a simple distance reading is all that's required. The compact nature of the device makes it ideal for integration into various projects.

Here are some project ideas you can build using this HC-SR04 ultrasonic distance finder:

Obstacle avoidance for robots
Parking assistance system
Automatic door opener
Liquid level sensor
Proximity detection for security systems

Hardware/Components

The core components are the HC-SR04 ultrasonic sensor and the A305 display module from ICS Station (in video at 00:35). The A305 module simplifies the process by providing a ready-made solution that directly displays the distance measurement without any external microcontroller. (in video at 00:40) The module is compact and easy to use, requiring only a 5V power supply. (in video at 00:50) The module has four pins for the ultrasonic sensor and a DC connector for power. (in video at 01:01) Additional pins are available for serial communication if needed. (in video at 01:18)

Wiring Guide

The wiring is straightforward. Connect the ground of the module to the ground of your power supply, and the 5V pin of the module to a 5V power source. (in video at 01:28) The HC-SR04 sensor is integrated into the module, so no additional wiring is needed for the sensor itself. (in video at 00:57) The module is designed to be plug-and-play, simplifying the setup process.

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Code Explanation

No code is required for this project as the functionality is entirely handled by the pre-built A305 module. The module processes the ultrasonic sensor data and directly displays the distance on its integrated LED screen. (in video at 00:48)

Live Project/Demonstration

The video demonstrates the device's functionality, showing how it accurately measures distances in centimeters. (in video at 00:17) The display clearly shows the measured distance, making it easy to read. (in video at 00:20) The device is powered by a simple 5V supply and requires no additional programming or configuration. (in video at 00:50)