Guest elektromeier Posted September 21, 2004 Report Share Posted September 21, 2004 hi midiboxcommunityim 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 regardselemeier Quote Link to comment Share on other sites More sharing options...
Duggle Posted September 21, 2004 Report Share Posted September 21, 2004 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 < 10mSThis suggests that what you mention is do-ablewith 6 DIN modules. The number of levels of brightness will be determined by the acceptable period. Quote Link to comment Share on other sites More sharing options...
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