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2n193r · 09-15-2005, 08:06 PM

PWM question, how would you change the duty cycle on a chip like this one?
http://www.allelectronics.com/cgi-bi...M-2&type=store

I thought that you would some how set the duty cycle and it would stay at that particular rate. (I could be miss understanding you guys)

Quote: Originally Posted by mushin

lez is right though, the software needs to be constantly refreshing the LEDs to maintain colors. Ultimately, it is more elegant to have a uC (or hell, a display controller IC) handle this duty, but I'm sure 2n193r can tackle that step if and when he feels ready.

First I want to build it the way with the PWM then I can do it with PIC(I just read a little bit about them but they sound cool).
Well I will do that after I do this idea that is kind of pointless. Have the front door of my pc open automatically by some sort of sensor with 3 LEDs that are red that fade from dim to bright red. Then activate that sensor any have it close.

09-15-2005, 08:06 PM	#17
2n193r Newbie Join Date: Sep 2005 Posts: 7 My Photos: ()	PWM question, how would you change the duty cycle on a chip like this one? http://www.allelectronics.com/cgi-bi...M-2&type=store I thought that you would some how set the duty cycle and it would stay at that particular rate. (I could be miss understanding you guys) Quote: Originally Posted by mushin lez is right though, the software needs to be constantly refreshing the LEDs to maintain colors. Ultimately, it is more elegant to have a uC (or hell, a display controller IC) handle this duty, but I'm sure 2n193r can tackle that step if and when he feels ready. First I want to build it the way with the PWM then I can do it with PIC(I just read a little bit about them but they sound cool). Well I will do that after I do this idea that is kind of pointless. Have the front door of my pc open automatically by some sort of sensor with 3 LEDs that are red that fade from dim to bright red. Then activate that sensor any have it close. Last edited by 2n193r; 09-15-2005 at 09:17 PM.