Circuit Design Resources

Does anyone have any good resources about circuit desgin?

I need to figure out what voltage power supply and resistors I need for a circuit that will have some shiftbrites, a micro maestro 6, and 18 other leds. I knew how to do all this stuff 3 years ago, but it has been awhile and I need to brush up on how to do the calculations.

I just need good resources. Thanks

It sounds like you just need some fundamental power equations, etc.
I found this software helpful for the basics in the early days, it shows you the formulas used for each calculation and you can just plug in the vaulues you want to use to save time.
Otherwise, ask the specific questions here, or do some web searches.