http://electronicschat.org | Introductory electronics eBook: http://www.ibiblio.org/kuphaldt/electricCircuits/ | Battery information: http://batteryuniversity.com/ | Soldering: http://tinyurl.com/y8p8lfp9 | Welcome to electronics! | <Viper-7> i know feng shui, chai tea, and 47 other types of kung fu | <HexaCube> oh, I'll do drawings with onshape, and do actual CAD with F360