Help needed please - advice on wiring

M

moricild

New elf
Joined
Aug 22, 2020
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Hi all

As a brand newbie with instructions from the family to take Christmas decorations to the next level, I have been studying these very helpful forums and I am hoping that you will take a look at my draft wiring diagram attached and lend me your wise counsel (I.e. help me to make sure I don’t blow myself up or burn down the house).

For my first show, I am planning some outlines (using strip) and strings of pixicles. If I have time, I will add some other elements.

For the strip, I am looking at https://www.aliexpress.com/item/33013911791.html and for the pixicles I am looking at https://www.aliexpress.com/item/4000791230891.html

I would be grateful for your thoughts and advice on fusing and power injection in particular, and pointers on any other mistakes you think I may have made in putting the proposed wiring together.

Thanks so much.

M
 

Attachments

  • Wiring diagram.pdf
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This is my first year as well but it looks good to me. The only problem that I see is in the top two pixel runs the first power injection points of both do not have a v- with it. Power injection should always have a v+ and a v-. This is also assuming that the black and red wires coming from the f16 are also v+ and v-.
 
Looks like it should work to me as well. I would suggest however that for the 2 groups of three (drawing left top) if you inject v+ that v- should be injected too. Voltage drops occur in both the v+ and v- power lines relative to the current being carried (within that particular conductor of course).
 
That is a lot of power injection, I can generally get around 100-120 12v bullet / square pixels with no power injection.
 
what i like to do .. is if i have connection between strings or strip do a power injection.. your doing a connection anyway. also i inject at the end, u have no connection so easy to do.
 
In the PDF he has power from the F16 on one end and power from the PSU to the other end and no break in the positive.
1598746669490.png
If you want to feed from both ends not problem (I do) but not from 2 different sources and fuses.
The loop at the end of string 2 and 3 ??
If the red wire from the F16 is Blue and the loop blue for data all good. Data and Power both Red is a disaster waiting to happen.
You want to do that, you do it.
8.3A across 2 fuses depending on wire size of each feed and length of wire, if all is equal 4.15A from each (PSU and F16)
Zoom picture has a break in the Positive.
 
I prefer to power all the leds/lights independently, essentially making the controller a simple data source (signal & ground).

Minimises the chances to fry a controller with spikes,shorts,loose/bad wiring, wrong voltage etc. A few stories of F16's with melted phoenix plugs, tracks exist, mostly just before christmas :)
 
Thanks for your help. That makes sense. Will likely take the same approach as @marmalade and power just from the PSU, not from the controller.
 
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