I've been studying circuitry from http://allaboutcircuits.com in hopes of experimenting with the arduino. I have read the majority of the DC volume and believe I have enough knowledge to begin working with the arduino board, however, I haven't actually built any circuits on my own yet. Are there any resources that you can recommend that will assist me in the transition from understanding how circuits function and their components, to actually creating some on the arduino board? Most of the resources I can find revolve around the programming-side of the arduino, which for me is no problem to learn. I need something that is focused on learning how to build the circuit itself.