DALI exponential curve

Yes, there is a formula to convert the two in DALI protocal, In our ballasts we set level 235 output about 60% brightness, you can try , I think any brands is similar.

 

Thanks, but I'm really after the formula so that I can calculate it for any value (60% was just an example).

I have an application which already sends levels to C-Bus dimmers, and I need to calculate the equivalent levels to send via DALI.

 

approxiate brightness of level 0-254:
0,
0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,
0,0,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1,
1,2,2,2,2,2,2,2,
2,2,2,2,2,2,2,2,
2,2,2,2,3,3,3,3,
3,3,3,3,3,3,3,3,
4,4,4,4,4,4,4,4,
4,4,5,5,5,5,5,5,
5,6,6,6,6,6,6,7,
7,7,7,7,8,8,8,8,
8,9,9,9,9,10,10,10,
10,11,11,11,12,12,12,13,
13,13,14,14,15,15,15,16,
16,17,17,18,18,19,19,20,
20,21,21,22,22,23,24,24,
25,26,26,27,28,29,29,30,
31,32,33,34,35,36,37,38,
39,40,41,42,43,44,46,47,
48,50,51,52,54,55,57,58,
60,62,63,65,67,69,71,73,
75,77,79,81,83,86,88,90,
93,95,98,101,104,106,109,112,
116,119,122,125,129,132,136,140,
144,148,152,156,160,165,169,174,
179,184,189,194,199,205,211,216,
222,229,235,241,248,255

 

Thanks for that!

If you have the formula from which the table was created that would be really useful too? But if not I at least have something to work with now.

 

Formula have but you hard to calculate yourself.


we can use computer to calculate it, I ve made a javascript program , it seems can not publish code here, please click :

DALI curve calculated by computer

_
_

 

Thanks, that's just what I was after. Its not the nicest formula in the world but I should be able to code it all the same.

Really appreciated, sorry for the delay in coming back to say thanks.