I'm building a fiber optical communication channel, for learning purposes and it is fun.
I know I could probably buy the driver as an IC, but I want to try and build the whole system from scratch for learning purposes.
Questions:
- What would happen if you connect a bipolar squarewave signal (-V to +V) to a resistor and then to the LED?...I think the squarewave signal has to be unipolar (0 to +V) if connected in the arrangement described above…I’m I correct??
What led me to try and do something fancy was articles such as:
https://www.electro-tech-online.com/custompdfs/2005/04/82103di-1.pdf page 94
I apologize if u answeard this in ur previews post and I didn't understand:
Note: The reason as to y use a constant current source for the LED is because the LED impedance changes with temperature therefore the current flowing into the LED will also change which will change the intensity of the LED emitter...Is my reasoning correct?