I made this so I could find the most ideal position for my projector in my room, I was asked to share it so here it is.

It has screen,keystone,viewing angle calculations. As well as native resolution and box weight calculations.

http://members.cox.net/minoten/calc.xls

pretty nice
thanks minoten for sharing

Thanks for posting your calculator, it seems helpful but I'm not quite sure how to use it can you define some of your parameters and show what you are trying to calculate.

you input only the section Variable

Hey Guru,

I'm trying to make sense of this little program you put together. Looks very cool.

I'm trying to figure out what size of screen my projector will display when placed in an end table next to my sofa.

First, are the measurements used all in inches?

Second, the'native resolution variables'...are these the measurements for my lcd monitor?

Third, what is the 'viewing angle'? Is '10' a default?

And lastly, am I correct in assuming that the information on the right side shows the actual size of the display on the wall, based on the measurements used? I am using the standard lense in this project and will need to incorporate some horizontal keystoning as well as vertical.

Your help is appreciated.

thanks.
Goombaman

I have updated the excel list, heres what i changed:
- I locked out all the cells that were not variables
- I made all variables yellow
- I put a big "MEASUREMENTS IN INCHES" thing...but you should be able to change them all to MM except the weight calculator, as long as your consistant and change everything to MM.

The "Native Resolution" thing...you input your PROJECTED screen size, and how many pixels your screen has. It then calculates how big of an image you would have if you used 1:1 on each resolution. Some monitors do not support this. Like if you have a 1024x768 screen, and display 800x600 1:1 then it will only take up 800x600 of the 1024x768 screen, and the unused edges around the picture would be black. The calculator tells you how big the 800x600 picture would be on your wall. Its hard for me to explain.

The viewing angle is the angle at which you tilt your head UP to see the CENTER of the screen. If you want the middle of the screen straight ahead of your eyes set it to 0... I find 10 degrees ideal otherwise your screen will be sitting on the floor.

You are right, the right side shows you the results of the data you entered on the left. If you see there is a column for "Standard Kit" and "Pro Kit"...so you can see what kit you will need to achieve the results your looking for.

Let me know if you have any more questions I'd be glad to help.

ok thanks.

Have a look at THESE numbers..does this make sense to you then? I am hoping to build my proj inside of a coffee table which would sit in front of my sofa. I'm concerned about the keystoning amount..may be too much to work properly. Also, what calculation are you using for the LCD vertical and horizontal size at the top right of your chart?


Thanks again.