[z64555]

it gets hardest when you start doing stuff with ac, capacitors start acting like resistors and inductors start acting like capacitors. fortunately most of the stuff i do is dc.

Nah, AC is no big deal, you just have to work with complex numbers and phase angles. Polyphase AC is where the "fun" starts.

[Nuke]

i haven't really ran into a situation where i need to think about ac at all. all i know is that the math starts getting somewhat harder. i did a dc course in highschool. i started ac but it was way over my head at the time. they didnt let us do anything fun like fiddle with microcontrollers, fpgas, or even basic logic gates. if i took it now id probibly breeze right on through it.

[z64555]

AC comes into play when you need to work with power supplies, generators, motors, or wireless communications. Wireless Comms is where things get really hairy... especially when you start getting into the GHz range where everything starts to look like a antenna for something.

[jr2]

Throw some formulas around for AC then and let's see if they make sense to Nuke.  xD