Power Injection Explained in Simple Terms

In this Tutorial I will explain power injection in simple terms.

What is power injection? Why is Power Injection Needed?

I will show 3 different examples of power injection. One example with a single power supply and 2 examples with multiple power supplies.

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NOTE:
Some controllers have power terminals/connections for 2 power supplies. The controller has two separate power terminals/connections. One connection is used for the 1/2 of the ports and the other connection is used for the other 1/2 of the ports. Example: Falcon controllers with 16 ports has 2 power connections (+ and-). The first power supply terminal is for ports 1-8 and the second power supply terminal for ports 9-16. The positive (+) connection isn't tied together on the controller.

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SPIKERLIGHTS - RGB Pixel Light Power Calculator

Electrical Characteristics of a String of Pixels DIAGRAM

POWER INJECTION - SINGLE POWER SUPPLY EXAMPLE DIAGRAM

POWER INJECTION - MULTIPLE POWER SUPPLIES EXAMPLE #1 DIAGRAM

POWER INJECTION - MULTIPLE POWER SUPPLIES EXAMPLE #2 DIAGRAM

Timecodes:
0:00 - Start
0:05 - Intro
0:20 - What is Power Injection?
1:16 - Electrical Characteristics of a String of Pixels
1:53 - RGB Pixel Light Power Calculator
3:15 - Power Injection using Calculator
4:04 - Power Injection - Single Power Supply Example
4:20 - Power Injection - Single Power Supply Guidelines
5:00 - Power Injection - Multiple Power Supplies Example #1
5:36 - Power Injection - Multiple Power Supplies Guidelines
6:42 - Power Injection - Multiple Power Supplies Example #2
7:30 - Conclusion
7:45 - Subscribe

[imercasanovaparra]

LOVE YOU GUY JAJAJA YOU ARE ALWAYS THE BEST TO TEACH, YOU DID JOY MY CHRISTMAS !!

[ColbyHiggs]

Your videos are great. I appreciate you sharing your knowledge!

[GFSwinger]

So you say when using one controller port but two power supply (PS) to never ever connect the +V together. Isn't that exactly what you are doing in the diagram shown starting at time 5:36 ? You don't have a red line connecting the PS1 +V to the PS2 +V but internal to the controller there is only one port 1 +V. The second diagram starting at 6:43 makes sense because you isolate the second string of lights from the port 1 +V by severing the red wire. The second two PS diagram makes sense, the first one does not because both halfs are sharing the port 1 +V.

[tjslbfyt]

Hi, Thanks for that video. I have 5 strips of ws2812b leds that I’m trying to power inject with a second power source.
I have source 1 (5v 3a) to the sp110e controller to the 5 Alitove wd2812b strips (each with 150 lights). I power injected at the 3rd strip, with source 2 (5v 60 amp supply), cutting the v+ between strip 4 and 5, then connecting source 2 to the power injection lines of strip 4. The v- and signal lines between strpis 3 and 4 are connected. But strips 4 and 5 are not coming on.
How can i fix that? What should I check?

Note: when I injected using just the same power source for everything, it all worked fine.