Sorgelig wrote:THaase wrote:6.0: Switch for the fan is gone agin
it's not gone. It's added. You can use either 0R resistors or use the jumper/switch.
Has to be too less coffee before answering
THaase wrote:@Sorgelig: in the Schematics you refer to R beeing 240R or 300R - have you done some calculations about the wave resistance for the R2R Network.
If I remember right the older one with the R1=510R has been quite near to the theoretical needed 75R?
I didn't. Actually i had no much choice for R-2R values. Basically only these 2 values are found on Mouser. I've tested it on my monitor and picture with 300R is close to what was in v5.6. I've also tried 499/1K but picture is darker.[/quote]
OK, thanks for the Info - as I said - just academic ....
I've had also searched for a full intergrated one ... basically found one from AD (would hve to check again) - but if I remember right this needed some kind of clock (don't ask me for the purpose at the moment - can't remember )