The idea we want to put into practice is part of the Security Devices category and is a system to alert visitors to the museum to keep the optimal distance between them and the exhibit, so as not to influence its lifespan in a negative way.
The ultrasonic sensor will calculate the distance between the person and the device. Following the results returned by it, an audio signal is emitted via the buzzer, respectively visually, via the LEDs. The green LED shows that the system is working, the yellow LED will light up if the visitor gets closer than 40 cm, indicating that it is starting to violate the required distance limit to keep, and the last LED, the red one, specifies immediate removal from the vicinity of the device, and the buzzer is triggered.
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