5V Ultrasonic Sensor Module with RGB Indicator Lights

Standard ultrasonic distance sensors report a number back to the microcontroller and nothing more, leaving any visual feedback up to separate LEDs and extra wiring. This module folds that in directly, pairing the usual trigger/echo ultrasonic ranging with onboard RGB lighting that can be driven to reflect the measured distance - closer objects showing a different color than distant ones, for instance - without adding a second component to the build.

The ultrasonic side works the same way any HC-SR04-style sensor does: send a pulse, time the echo, calculate distance from the speed of sound, giving a workable range of 2cm to 4 meters with accuracy down to about 3mm. A wide -40°C to 100°C operating range means it holds up in enclosures or outdoor robots that see real temperature swings, not just a climate-controlled desk.

Common uses are obstacle-avoiding robots that want an at-a-glance visual proximity indicator alongside the raw distance reading, interactive art or lighting installations reacting to hand or object distance, and any build wanting both ranging and status lighting from a single connector.