I'm a beginner in designing circuits. I've designed this circuit myself. It may has a lot of mistakes but it works. I find the idea of this circuit is amazing because light or Infrared rays can carry my favorite song
I also have some questions and I wounder if you would mind helping me to improve this circuit :
1- The sound that comes out from the speaker is noisy. There is not much noise. I mean the noise is acceptable but what if I want to improve it, should I add band pass filters ? or change base bias ? or do something else ?
2- The IR LED must be 1 inch far from IR receiver so that the quality of the sound is almost good. If they are closer than 1 inch, Noise increases. If the distance between them is larger than 1 inch, Sound becomes lower and lower until it disappears.
What can I do to increase the distance without disappearing the sound ? ( such as the distance of TV's remote control )
3- Are C3 and R5 provide a High pass filter ? or the capacitor just passes AC signals and resistor is just a part of voltage divider ?
4- There are to kinds of IR receiver black one and White ( transparent one ) what is the difference between them ?
Thanks in advance, I hope I'm not bothering you due to my many questions god bless you
I also have some questions and I wounder if you would mind helping me to improve this circuit :
1- The sound that comes out from the speaker is noisy. There is not much noise. I mean the noise is acceptable but what if I want to improve it, should I add band pass filters ? or change base bias ? or do something else ?
2- The IR LED must be 1 inch far from IR receiver so that the quality of the sound is almost good. If they are closer than 1 inch, Noise increases. If the distance between them is larger than 1 inch, Sound becomes lower and lower until it disappears.
What can I do to increase the distance without disappearing the sound ? ( such as the distance of TV's remote control )
3- Are C3 and R5 provide a High pass filter ? or the capacitor just passes AC signals and resistor is just a part of voltage divider ?
4- There are to kinds of IR receiver black one and White ( transparent one ) what is the difference between them ?
Thanks in advance, I hope I'm not bothering you due to my many questions god bless you