LONG TLC5947 LED Driver Daisy Chain Flickering RESOLVED
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
"NI recommends terminating as close to the receiving device as possible and using Schottky diodes (Figure 1) to clip the overshoots at 5.3 Volts and –0.3 Volts. A problem might occur with the parasitic capacitance of these diodes where you might still notice some large voltage spikes before the diodes allow the current to flow."
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
Re: TLC 5947 LED Daisy Chain FLICKERING
the design is completely chainable. As long as there's enough power for all the boards you can chain as many as you'd like, like a little trail of blue PCBs stretching out into the sunset.
Re: TLC 5947 LED Daisy Chain FLICKERING
mpinner wrote:now im to learn that the sunset is in fact on 10-15 boards aways with little explanation and i should throw more arduinos at the problem.
mpinner wrote:i might have pinned down the TDO value in data sheet to something between 15-25ns. will a little help i could argue that this should be plenty fast over my 480" and 1440 leds to run at 1MHz with now skewing issue. please correct me here if im wrong. is this TDO skew is infact additive, then the 25ns * 1440 could be 36 microseconds. then my clock speed would have to be 1/36000000 or 3MHz... so im good?