Well I have to admit that Grim is off to a good start ... he included his location!! That's alot more than I can say for many other members here. Some sound advice to keep you in good standing here is not to ask dumb questions such as "how do I calculate the voltage drop across R5 in the circuit below?" A more acceptable question to post would be, "How can I make a microprocessor chip out of match sticks, carpet fuzz, a rubberband, paperclip, and some glue?"