Hi Nick

controllers nowadays are easily fast enough to do very smooth fading even 
when dimmed. I do 6 iterations (one for each digit) of 1000 counts (for 
dimming and fading of each digit) with a minimum digit on time of 1000 and 
a maximum digit on time of 999. I calculate the switch from old to new 
digit based on the percentage of the fade that is done and the dim factor. 
This gives smooth dimming when fully on, or fully dimmed, or anywhere in 
between.

There's still easily enough time to do all the other work that's needed 
outside the loop.

You have one of my early clocks modules don't you? I should arrange a 
firmware update for you, the hardware is largely the same, but the firmware 
has come on leaps and bounds.

Ian


On Sunday, 13 November 2016 15:10:49 UTC+1, Nick wrote:
>
> Just wondering what people's favorite smooth cross-fading algorithms were, 
> assuming that they're prepared to share !
>
> I tend to PWM down one digit and PWM up the next over a short interval, 
> but others will have their own methods...
>
> Nick
>

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