Skillet
Newbie level 3
I am working on a senior design project to develop a laser key system.
Currently we are directly modulating our laser with the output of a PIC microcontroller (which is a code fragment that is hardcoded). We are outputting this in the NRZ(L) standard for binary codes, but we want to modulate this digital signal with a carrier to send to the laser.
We want to do this because it will help counter the DC effects of the sun or other light sources on our signal. This modulation will be filtered out on the receiver with a bandpass filter.
We need an inexpensive IC chip that would be able to accomplish this with no programming. Or any other circuit that would accomplish this and be easy and compact to implement.
Thanks for the help
Currently we are directly modulating our laser with the output of a PIC microcontroller (which is a code fragment that is hardcoded). We are outputting this in the NRZ(L) standard for binary codes, but we want to modulate this digital signal with a carrier to send to the laser.
We want to do this because it will help counter the DC effects of the sun or other light sources on our signal. This modulation will be filtered out on the receiver with a bandpass filter.
We need an inexpensive IC chip that would be able to accomplish this with no programming. Or any other circuit that would accomplish this and be easy and compact to implement.
Thanks for the help