Smart Signal Detection LED Notice Sign

The problem is as wireless devices such as cell phones, Wi-Fi routers, and Bluetooth-enabled equipment become more common, keeping restricted areas like government facilities, research labs, and data centers secure has become more difficult. Unauthorized electronic signals can lead to information leaks or interfere with sensitive equipment. Currently, most enforcement depends on people manually checking and reminding others to turn off or leave their devices behind, which can be unreliable and inconsistent. Manual enforcement also increases the chance of human error and makes it harder to maintain strict no-electronics policies.

The purpose of this project is to design a Smart Signal Detection LED Notice Sign that automatically detects RF signals from cell phones, Wi-Fi, and Bluetooth devices. When an unauthorized signal is detected, LED lights will turn on to alert personnel nearby. This system provides a low-cost, automated way to reinforce no-electronics rules and improve security awareness.
 

How we plan to work on it is by using an Arduino microcontroller, an RF signal detection module, and LED indicators inside a shadow box frame. The microcontroller will be programmed to detect signals in the 700 MHz–2.7 GHz and 2.4 GHz/5 GHz ranges and activate LEDs when signals are found. For coding, we will be using Python to make the LED lights turn on and off when signals are detected. Testing will include measuring accuracy, detection distance, and response time. Future improvements may focus on extending range, improving accuracy, and creating a compact, tamper-proof version for real-world use.