When you buy a 120VAC to 12VDC converter make sure the current rating is atleast 3.3A. That's a decent size wall wart. Using a wall wart with that rating is probably one of the safer options you have, especially if you don't feel comfortable with 120VAC circuits.
I would review "Sum of Products" and "Product of Sums" in your class literature. There should also be a section in the book/notes that show you how to implement these two forms. Remember that an "OR" gate is represented by addition and that an "AND" gate is represented by multiplication.
I would talk to your professors and see what software your school has licenses for (assuming they do). I personally like MultiSim for general circuits. Although, I would not pay the money for the personal license.
I'm not for sure exactly how your relay is connected on the PCB, but I'm assuming your motor is rated for 12V (check this!). You would probably want to connect +12V (from the battery) to the relay's COM (common) and then hook your motor up to the NO (Normally Open) terminal. Your other motor...
The employer I work for never asked for a diploma or a GPA. I have also talked with several graduates who too have not been asked for their dimploma. But, the questions that I got asked during my interview would have been very difficult to answer without the degree in EE. A healthy background...
If you look at an Oscilloscope with your "hot" being positive and your "neutral" being common, the sine wave (voltage) will go negative. How else would the current change directions? The neutral should stay at 0 V with respect to ground. When the "hot" reaches it's minimum at let's say -170...
First off, I do not think GPA's are as big of a factor as most people would like you to believe. I know people (including myself) that have gotten EE jobs without the employer asking for a GPA or even checking to see if you actually graduated from a University. I think passion and creativity...
Neutral (white) and Ground (green) are some-what the same thing. The only difference being neutral is the current carrying conductor back to the power source. Ground is used as a safety mechanism, only to conduct current under fault conditions.
There shouldn't be a voltage difference between...