I built an IR communication system . the transmitter controlled by arduino and modulated in 38Khz. the reciever is also controlled by arduino (another one) and demodulting the transmitter signals. everything is great so far. now i want to enlarge the communication range up to 1 kilometer and even farther. how can i reach this range (not involving any optics - telescope and ect.) by replacing to a very powerful led?
or optics is necessary for this kind of ranges?
by replacing to a very powerful led?
No.
optics is necessary for this kind of ranges
Possibly but note that IR is absorbed by glass and IR is not bent as far as visible light with any given lens also it is difficult to align optics when you can not see the beam.
Basically I would say you have no chance of achieving this with an LED and a Laser would be a better bet.
You'll be able to extend the range a lot with one of these, but 1 km is probably too much.
Thank you for your reply.
If i replace my light source with laser and respectively the photodiode , with the same communication protocol (NEC protocol), do you think it will work?
Hmmm, reminds me of RONJA!
KOOPI:
Thank you for your reply.If i replace my light source with laser and respectively the photodiode , with the same communication protocol (NEC protocol), do you think it will work?
It depends on how the modulation / demodulaion is handled.