ESP8266 Community Forum

- Sun Apr 08, 2018 4:04 am #75208 Ok, I see. It's ok that the one driving its colour gets warm, but as mentioned shouldn't get burning hot.
One more thing I have in mind is that your separate grounds may cause this somehow. Unfortunately I'm too less skilled with in-deep electronics to point this out. But I would definitely not use it this way.

- Mon Apr 09, 2018 3:02 am #75227 TIP122 is a standard darlington transistor, so roughly has a voltage drop of ~1V, depending on the number of LEDs and PWM frequency you get non neglegible powerloss on the transistor that may be too much for dissipation without heatsink.
Go for real FET like mentioned here viewtopic.php?p=71919#p71919 and make sure you also have all necessary modifications in the sketch...

- Mon Apr 09, 2018 3:23 am #75228 Thanks schufti for joining in with this hint!

- Mon Apr 09, 2018 4:49 am #75229 As far as I researched, the mentioned IRLZ44N MOSFET can even replace the TIP122 without changes to the layout:

Base - Gate -> to pin 5, 6, 7
Collector - Drain -> to R, G, B (strip)
Emitter - Signal -> to GND

Could someone please confirm this to be correct?

IRLZ44N.jpg

RGB Controller v0.2.jpg

You do not have the required permissions to view the files attached to this post.