Recent content by lukesowersby

The best viewing distance is the distance at which the virtual image produced is best viewed at. I'm not sure how this is calculated as it is usually a given value, which is 25cm in this case.

Homework Statement Hi. I'm required to calculate the magnification of a microscope with the variables given. I have calculated this, but was just wondering if the best viewing distance is bigger than the length of the microscope, would this have any effect? Homework Equations N/A The Attempt...

Thanks for the reply. Downloading now...

Hi, At university we are using the Borland C++ 5.5 compiler, however, this does not work on Vista, which my home computer has. I was therefore wondering what C program compiler everyone would recommend which works on Windows Vista? Thanks, Luke.

Yeah, thanks for your help.

Ah, forgot about rms. Thanks. That equation was given a bridge rectifier (4 diodes) with a capacitor and load resistor, but exluding the regulator. So i assume to calculate Vac, if i want Vdc of 5, i simply calculate 5+the voltage acrross the regultor, all divided by 1.41.

I've got another problem. For a full wave bridge, with a capacitive filter, we are told the following relationship between Vdc [V(Regout)-V(Rectifidn)] and Vac [V(Secondary)]: Vdc = 1.41 x Vac However, I'm obtaining the following results...

Yeah, had a suspicion it might have been that, but it took me a while to work out how to enter an expression. Only started using the program a few days ago, so I'm still getting used to it. http://img218.imageshack.us/img218/138/ltspice2rc0.jpg Many thanks for your help.

Homework Statement I am to build a linear power supply in four stages. However, at stage two, i have to add a bridge rectifier to the ouput of my transformer. My lecturer at university says i should get a graph that is a sine wave, with the negative values reflected into the positive x-axis...