Matronics Email Lists :: View topic - Flickering on PCA9685 PWM controller with 3W RGB LED

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Flickering on PCA9685 PWM controller with 3W RGB LED

Matronics Email Lists Forum Index -> Lightning-List

View previous topic :: View next topic

Author Message

n5pb(at)AOL.COM
Guest

Posted: Fri Jan 13, 2017 10:07 am Post subject: Flickering on PCA9685 PWM controller with 3W RGB LED

Chuoi,

  I do know too much about electronics, but a good friend of mine is an electrical engineer.  I asked him if he had any ideas to help you.  Here's what he said:

   

  Tell him.

  The way this works is to get the LED to "dim" your turning it on for 50 % of the time.  Real dim= the LED is on for 25% of the time.  What I think is happening is the 200 hz is too low for the DIM mode without flicker.  Try 1000 hz.  Using a cap on the LED side is a bad idea but it might help (prob not) on the 12V side.  Also get a VHF handheld and scan the comm band for noise when you are running this.  It is possible for these PWM switches to put out a lot of noise if not properly designed.  You don't want to be dimming the lights to find out you got no comm receiver anymore!

       Mike Dwyer

 

 

 

 

 

   

   

  --

- The Matronics Lightning-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Lightning-List

Display posts from previous:

	Matronics Email Lists Forum Index -> Lightning-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum