Welcome Guys... Im in District Heights,MD. ...
Electric is out of my league.
This is like my wife saying she can't do simple arithmetic in her head. I break down any problem that she can not figure out into two or three pieces and make her do it just to prove to her that she can; if she just tries.
DC circuits were taught in the fifth grade science class with a six volt lantern battery when I was a bit younger back in the forties. Today they teach you how to pass tests, because that is how teachers are paid (because it is the law of the land thanks to Laura Bush).
Are you telling me you aren't smarter than a fifth grader or you don't want to try?
DC circuits are easy. All you need is a pencil and a paper and you can draw the circuit out on a sheet of paper. It is just a big loop from battery to the device and back again. Wiring diagrams get messy because there are a lot of circuits on one piece of paper. Paper is cheap, if they printed each circuit on a separate page your kid could figure it out.
DC circuits are safe in automobiles because the current is limited by the low voltage. Your body has a natural resistance to voltage up to about 28 volts. Above that voltage level (found in aircraft) and it could be deadly. It is a DC circuit that they use to kill people in the electric chair (because the AC power company doesn't want to get involved in the process for political reasons). DC isn't any safer than AC just that it is usually only found today in battery powered devices with very low voltage (outside of New York City anyway).
You can (or used to) be able to go into a Radio Shack store and buy a DC circuit kit to give as a Christmas gift to bright kids who were college bound (at least according to their parents). It contained light bulb sockets, DC light bulbs, electro-magnets that you could turn into solenoids, door bell buzzers, even a crystal AM radio you could put together to discover how things work. The best part of the kit was it had an easy to understand instruction book that told you what each part was, how it worked, and offered suggestions on what it could be used for. You supplied the screw driver and the imagination.
As a retired engineer, who got his degree in mechanical engineering (and a business degree) before calculators were even invented, it drives me nuts to have people say I can't do it. My grandfather who lived through horse and buggy transportation to the space shuttle built bridges, dams and buildings that are still in use today. I have all three text books he used when he got his engineering degree in Scotland back in 1903 (my text books fill two large book cases). He had the excuse of many of the sciences being not as well under stood as they are now. But he didn't let it stop him from doing his job. He made his calculations and added fifty percent more for safety. That is how the DC-3 (C-47) airplane was designed, known as the worlds safest air plane up until the C-130 was built and proven.
Remember, there is no try (without first disconnecting the battery); Do or Do Not!