Hi all,
I am a beginner to arduino trying to transfer data through LASER in arduino.but I couldn't read the transfered String and i am getting garbage values.I am using photodiode on the receiver side to detect the transmitted signal.I have connected the LASER and photodiode to Tx and Rx of two arduinos respectively.Should I use any modulation algorithms to transfer the data through LASER?? or Can it be transfered simply through Tx without any modulation??? Plz help me out
Most modern optical transceivers I have come across use some form of modulation as this helps to eliminate the effects of normal visible and invisible light from interfering with the signal
This is exactly what all modern TV remote controls do, they modulate the signal with a 38Khz carrier and the receiver filters out everything except this frequency before decoding the signal
like this where you have a carrier for the "0" and no carrier for the ones, there are many ways to modulate, this is just one of them
Hope this helps
Peter
