Dimmable LEDs and other ledquestions

[Guest elektromeier]

hi midiboxcommunity

im building a lightinstallation with 193 LEDs and im thinking about the fantastic midibox as io interface.

i have a few questions because im not update with the latest  mios developments.

-is there a way do dim the leds via pcm? is the pic fast enough for this application? the controllervalue 0-127 should controll the brightnes of the led

-with the midibox64e its possible to drive multiplexed leds. that would make the cabling much more easier. each ring is assigned to a midicontroller wich receives relative values +1 -1 is that correct? is there a way to assign each single led to a midicontroller?

-does the multilplexmethod affect the brightness of the leds a lot? can i use the same leds (20-30 mA) im still testing which ones,

-in general is it better to use 6 dot modules and 2 core or one core and one multiplexed dout?

best regards

elemeier

[Duggle]

hi, just a few points to consider:

the brightness of LED's is directly proportional to the duty cycle.

The update of DOUT modules is in the 10's of uS.

Flicker becomes visible 50->100Hz.

-> period of dutycyle  < 10mS

This suggests that what you mention is do-able

with 6 DIN modules. The number of levels of brightness will be determined by the acceptable period.