I have a Honeywell R7184U Oil burner controller. It features an alarm pinout that outputs 30vac 2amps continuous. Yes, that's AC not DC voltage. As seen in the PDF inked below. http://homeappliance.manualsonline.com/manuals/mfg/honeywell/r7184u.html?p=2
I'd like to interface this with my Arduino UNO. I imagine that I need a relay board, but the relay boards that I currently have expect DC input not AC. I realize that I could build a bridging rectifier to normalize the AC into DC current, but wondering if there's a "Better" way?
Can someone please advise as to how to make this interface without blowing up my UNO board?
The gritty details: I've written a prototype smartthings application that will send me a notification when a certain event is triggered. The Arduino Uno will be paired with a smartthings shield. I envision that I'd write an arduino program that will trigger that smartthings [furnace is on the fritz] event when a voltage (or relay closure) is detected as given by the furnace (via some interface that I hope you can help me with).
I hope I've asked the question clearly. I'm not an expert by any means. Strictly amateur.
Thanks in advance, Mike