Communication via laser

Hello, I use an Arduino uno to drive my laser. We use that for communication test. Our longest contact up to now is 51km !

Moderator edit : removed external link

see you soon

Jean Marie

Explain more about it. Information is not really sufficient to deal with

What is your question?

That sounds great, what type of laser are you using as having a stable collimated beam of 51km is extreme. How is the arduino driving it? Does the arduino have enough power to drive the diode or are you using an external driver?
Please tell and not just post and run…