Re: Basic DMX
The calculator is nice, but just to explain:
The system is that switch one is the DMX value of one. Switch number two is the DMX value of two.
Onwards from this you double the DMX value every time you go to the next switch.
This gives you the following sitiation:
S DMX
1 1
2 2
3 4
4 8
5 16
6 32
7 64
8 128
9 256
10 512
If you want the dimmer to correspond to channels 9-12 you need to make sure the dimmer is set to DMX value 9, this is called the starting address of the dimmer. For most dimmers this will make the first channel DMX value number 9 and the following three channels will be 10, 11 and 12. For some dimmers you can set the channels to be any value independently.
To get to DMX value 9, look for the highest possible number that is lower than 9, in this case that would 8, so you switch on switch number 4. You are still missing tha DMX value of one to get to 9 (8+1=9) so you need to switch on switch number 1 as well.
Let's say you need DMX value 47. The highest value lower than 47 is 32. 32 plus 16 is 48, so that is too high and won't work. 32 plus 8 is 40, and to get to 47 you need seven more, which would be four plus two plus one (32+8+4+2+1=47). In other words, DMX value 47 needs the following switches turned on:
S DMX
1 1
2 2
3 4
4 8
6 32
Hope this helps 
Kristian
