Hi,
I recently got an awesome new laptop. However, soon after I got it, I found out, to my great disappointment, that it lacked a TV out. All it has was a VGA output. Not to be defeated, I began to look for ways to convert the VGA out to a signal that was compatible with my TV. After looking at several commercial solutions, I found out that ICs exist to do this. What I wanted was a self contained unit that would take the VGA signal and convert it to a NTSC S-video signal. By referring to the data sheets for the various components I wanted to use, I developed a preliminary circuit design. From this, I intend to etch a board and put it together, but I have a few questions first.
Please refer to the circuit in the attached file:
My main question refers to the capacitors. The regulator I am using required an output capacitor to remain stable (C3), and the other IC, and the oscillator both call for capacitors across the supply voltage inputs (C4,C12,C14,C15,C16). I presume the capacitors are there to ensure a stable input voltage, but are all the capacitors really required? Will having this many capacitors cause any bad effects on the circuit performance?
Also, if there are any other issues anyone can see with the circuit, please let me know. I will probably be etching the board in the next few days unless I hear something that requires me to redesign the circuit.