I don't see a good reason that this question was migrated to Arduino. Yes, it was posted by a clueless ardweenie who showed more of a Paint drawing than a schematic, and there was a arduino envolved, but the question itself had nothing to do with the arduinoness.
Both Andy and I posted answers that got several upvotes, and the OP even accepted one of them.
If I had known this question was going to get banished to the kiddy table, I wouldn't have bothered writing a answer. I usually don't put much effort into things that will likely be moved or closed. I thought this one might get closed due to bad schematic, but it never occurred to me that it might get migrated.
What does the community think of this migration? Or perhaps the mod that did the migrating can defend the action or explain the special circumstance that the rest of use aren't aware of?
I just noticed that the edit history got wiped out. This question might have started with no schematic, but certainly went thru at least 3 versions while I was watching.