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.
If you have any questions, please contact me on Discord - TheChristmasLightGuy
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SPIKERLIGHTS - RGB Pixel Light Power Calculator
spikerlights.com/calcpower.aspx
Electrical Characteristics of a String of Pixels DIAGRAM
docs.google.com/drawings/d/1h...
POWER INJECTION - SINGLE POWER SUPPLY EXAMPLE DIAGRAM
docs.google.com/drawings/d/1d...
POWER INJECTION - MULTIPLE POWER SUPPLIES EXAMPLE #1 DIAGRAM
docs.google.com/drawings/d/1s...
POWER INJECTION - MULTIPLE POWER SUPPLIES EXAMPLE #2 DIAGRAM
docs.google.com/drawings/d/1h...
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

[@ronm6585]

Thank you.

[@thechristmaslightguy]

You are welcome. I hope the tutorial was helpful.

[@charlesc4325]

that was very informitive, thanks

[@thechristmaslightguy]

Thanks - I'm glad you like the tutorial.

[@tjslbfyt98]

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.

[@thechristmaslightguy]

Do you have the v- from source 2 connected to v- on strips and source 1?