Need some help with a PCA9685 to pilot a LED ribbon
Posted: 12 Sep 2019, 05:37
Hello all,
I need some help to get my project to work. I want to control a LED ribbon (12v) from a wemos D1 (with the latest Mega) via a PCA9685. It's highly inspired from that https://mellbell.cc/blogs/projects/rgb- ... using-pico.
I cant find the solution to control the transistors from the PCA9685. When i connect directly the 3.3v to the transistor base, it works fine, but I can not get the PWM to work. I worked a little bit with modes (16 and 14) with no success.
Has anyone achived a similar project ? What's the detail I'm missing ? Are the transistors OK ? Should I find a different GPIO extender?
Any help is appreciated.
I need some help to get my project to work. I want to control a LED ribbon (12v) from a wemos D1 (with the latest Mega) via a PCA9685. It's highly inspired from that https://mellbell.cc/blogs/projects/rgb- ... using-pico.
I cant find the solution to control the transistors from the PCA9685. When i connect directly the 3.3v to the transistor base, it works fine, but I can not get the PWM to work. I worked a little bit with modes (16 and 14) with no success.
Has anyone achived a similar project ? What's the detail I'm missing ? Are the transistors OK ? Should I find a different GPIO extender?
Any help is appreciated.