I still think you need to be careful about how much current you're running through the LED-wiz. What sort of strips are you talking about? You mean a little strip of 5 LEDs or so, or are you talking about the 1 meter or 5 meter strips from ebay running off of +12Vdc? Those things need some serious current.
Yea, but those strips are cut-to-size and can be distributed across multiple outputs of the LED-Wiz to help with current draw.
True, but I'm just saying do your homework first before smoking your $45 LED-wiz board. I just saw some 5m RGB strips running at +12v on ebay that said they ran at 72 watts so that's like 6 amps for a full strip. He's probably not using 5m but that's why I asked how long his strips were. I've got plans for my cab that will take close to a full 5m strip.
The specifications for the LED-Wiz are a bit ethereal... "The output drivers used with the LED-WIZ are technically capable of handling up to 50v at 500ma per output. However, as the LED-Wiz is not designed to handle the maximums possible as a result of driving every output at its fullest potential, it is ultimately up to the user to decide what is prudent and safe when deciding how to use the LED-Wiz in their application." I don't see anything in the documentation about total current draw through the whole board either. Basically if you're doing anything other than run of the mill LEDs you're taking your chances, which is fine, I'm just saying give it some thought. You *could* split things up and use multiple outputs but you still have to wonder about the unspecified max current for the whole board, and it seems a waste to me to use up outputs that way.
Mosfets however are pretty cheap. If you have any electronics skills, just make your own buffer circuits. I just built a home monitor system in my basement to let me know if I had any water coming in, has some tilt switches on a shutoff valve on our sewer line and automatically shuts off power to an ejector pump when the valve is closed, that sort of thing. I used mosfets to drive the relays and a buzzer/alarm off of +12v using control signals from the +5v microcontroller. I used FQP7P06 mosfets from mouser, rated at +60Vdc and 6.7 amps. Cost under a dollar each. Some cheap perfboard, wire, one 10KOhm resistor on each gate (practically free). Total material cost is under five bucks, just takes a little of your time. I've got some lighting plans for my cabinet (as soon as I get some time) and I'll definitely be buffering things with driver circuits like that.