Hi I am new to this forum but I have a question. I am building a simple relay circuit. My source power is AC and I want to switch a DC circuit on when the AC circuit is on. Keeping in mind the requirements of voltage and amperage requirements of relays, do I need anything else besides resistors and the required wiring to hook up the relay. Do i need anything else? Can I mix ac and dc power circuits in a relay without a problem? because last thing I would want is to fry a relay I just bought or start a electrical fire or who knows what other danger is involved. Also what requirements do I need to keep in mind when shopping for a relay for my relay circuit