How to create "Papi" with Arduino?

Other Hardware LEDs and Multiplexing
1

Hi, i'm creating my maturity project, a runway landing with a wheather stasion, all controllend by an arduino, but i want to add sometingh special, i want to add a "Papi"
Papi is (by wiki): A precision approach path indicator (visual aid) that provides guidance information to help a pilot acquire and maintain the correct approach (in the vertical plane) to an airport or an aerodrome.

Generally Papi are 2 or 4 leds, that tells me if i'am too high or too low, by changing their color (red or white). This is an example:

But i really i dont know how to create it. Some one can help me? Thanks.

P.S. Sorry for my bad English, but i'am Italian.

2

Hi and welcome.

How do you propose that an arduino can help with your idea? What you describe is the same as the coloured "sector lights" that are used in the horizontal plane for shipping guidance. They are entirely passive and rely on optics to determine which colour is visible based on the angle of approach.

Paul

3

Hi, i was thinking to use a ultrasound sensor, that detects how far is the plane from the runway. So if is too far, all led are white, and if is too close, all led are red.

4

Ultrasound sensor has a range of about 3 metres, and it is a glide angle, not a specific height.

What sort of plane is this?

5

In the US, it is illegal to use home made systems on runways.
As was mentioned, these are simple passive systems.
It is just aiming the lights.
Dwight

6

I very much doubt he is referring to a genuine, full-scale airport.

What we do not know is just what he is doing. :astonished: