What kind of questions will get a reply?

Another thing to remember is the title or subject line of your question; if you write a subject like "Please help me" or "N00b seeks help", then there is nothing to attract the interest of a reader. If you ask "How can I interface a relay?" or "What's the best way to control a motor?", readers who have an interest or expertise in the subject will spot it.

I would also agree with the previous postings where people have mentioned a clear description of the problem, and a full disclosure of what you're trying to do. Often, I've read questions where it seems that the writer is trying to get us to play a guessing game. Such questions need a few rounds of "what are you really trying to do" and "in what way does your circuit not work" before we get the complete facts.