Comments on: New “Preprogrammed” PIC option for Aurora https://blog.theledart.com/blog/new-preprogrammed-pic-option-for-aurora/ Art and Technology are Friends Tue, 18 Aug 2020 10:01:26 +0000 hourly 1 http://wordpress.org/?v=3.9.1 By: The LED Artist https://blog.theledart.com/blog/new-preprogrammed-pic-option-for-aurora/comment-page-1/#comment-797 Tue, 15 May 2012 16:59:12 +0000 http://www.theledart.com/blog/?p=927#comment-797 The way Aurora controls the LEDs is a bit unusual method of PWM. 127 pulses comprises equivalent of one normal PWM cycle. (I reduced the steps from 255 to reduce flicker)
The pulses are generated at 85.56 kHz. 127 steps for R/G/B so 85,560/127/3 = 224.6 Hz. This is the “Effective” PWM frequency.

The numbers are slightly different from the earlier firmware…

]]> By: Bruno https://blog.theledart.com/blog/new-preprogrammed-pic-option-for-aurora/comment-page-1/#comment-795 Mon, 14 May 2012 18:20:53 +0000 http://www.theledart.com/blog/?p=927#comment-795 Since I don’t know assembly, only C programming, would you mind helping me understand a little more of your project?

What is the actual PWM frequency? Following the color chart given on instructables, do you really only use 255 steps of the PWM or you use all the 12 bits step?

Because, if you have a refresh rate of 246 Hz, and you put 255 cycles in it, the PWM freq would be 246*255, am I wrong?

Sorry to bother you, but thanks for the attention.

]]>