Since the 1970s, they have been used in the most varied applications, such as cell phone backlights, pushbuttons, flashlights, display screens, and road signage, among others. They can be found in the colors: red, orange, green, yellow, and blue. Essentially, these types of LEDs are ...
Bústia Ciutadana: Citizens can make complaints, report city problems, such as broken street lights, or suggest improvements. The data are sent to a central location and the employees respond immediately to the user [99]. IDBCN: This application allows citizens to be digitally located remotely....