I'm thinking about using a laser to send morsecode a few kilometers as an experiment...
However, my experiance with lasers is mostly by pointing at the projector screen in powerpoint presentations.
So some questions.
What power is needed if it should be just possible to see when the laser is turned on and off, at ~5km (3 miles) away at night. (Would be perfect if you couldn't see it on a sunny day, but it should not be any problem at night)
And of cource without ANY risk of damaging your eyes. (IR filter, any more that should be done?)
I guess i'll be fine with some 1mw one? But I have never used lasers over these distances, so I really don't know.
And how many times can you turn a laser on and off before it breaks? (typically).
Or maybe some LED setup would be more suitable?
All input to this project is appreciated!
However, my experiance with lasers is mostly by pointing at the projector screen in powerpoint presentations.
So some questions.
What power is needed if it should be just possible to see when the laser is turned on and off, at ~5km (3 miles) away at night. (Would be perfect if you couldn't see it on a sunny day, but it should not be any problem at night)
And of cource without ANY risk of damaging your eyes. (IR filter, any more that should be done?)
I guess i'll be fine with some 1mw one? But I have never used lasers over these distances, so I really don't know.
And how many times can you turn a laser on and off before it breaks? (typically).
Or maybe some LED setup would be more suitable?
All input to this project is appreciated!