Author Topic: Power Supplies  (Read 414 times)

Offline Ulan

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Power Supplies
« on: January 22, 2019, 03:21:56 PM »




I see the 12v 350 watt power supply is used a lot.  I know this is a loaded question because all the variables but how many pixels assuming 100% brightness and say it the strand starts at the controller, can one 350 watt 12v supply power drive?  Is it 350 watts divided by pixel consumption?  350 watts / .7 = 500 as a rough estimate?


In some scenarios I'm looking at has 1000 pixels, I would need to inject in three places according to http://spikerlights.com/calcpower.aspx


Can I run a second line off the power supply to an f-8 distro and inject down line at all three points? Or based on the assumption above only at one point and would need a second power supply, (Shared ground, not +V) to inject the last two points?  And if it can only power one, why do the distro boards have 8 sockets?


Lastly, I see videos of folks using much larger voltage power supplies.   Is this worth investigating for large amount of pixels? 


Thanks!

Online Bwinter

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Re: Power Supplies
« Reply #1 on: January 22, 2019, 03:28:08 PM »
Many use a 350 WATT power supply, and others use 1,000 WATT power supply (or larger).  But they're all 12V.  You can obviously drive more pixels off the 1,000 WATT than the 350 WATT--but the important thing is they're both 12V.


Some people may use a 24V power supply then use a DC/DC converter to drop that down to 12V to power pixels.  Or use a 12V power supply, then drop that down to power 5V pixels.


So there are different ways to do this.  Just based on your preference and comfort level.

Offline Todd

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Re: Power Supplies
« Reply #2 on: January 22, 2019, 04:01:09 PM »
large or smaller power supplies really depends upon the amount of area you are covering. If all your props are in a relative small area a larger power supply is fine. If you have props spread out all over, multiple supplies would work better. Your layout will determine what you should do with power. also with one large supply if it goes out, it all goes out and is fairly expensive to replace. With smaller supplies you can swap them out easily and inexpensively.
Just my two cents worth......
Todd L.
Kimberly, WI

Falcon F16V3 F48, FPP, X-Lights, LOR, Pi 3B

Offline Ulan

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Re: Power Supplies
« Reply #3 on: January 22, 2019, 04:14:25 PM »
I'm mostly picturing meteor sticks on all the eves and since they are densely packed with pixels vertically over a short horizontal length, injecting is fairly easy from one supply or one location.


That said, can i do a rough estimate with watts / pixel usage?   1000 watt supply / .7 watt usage = 1428 pixels  ?

Offline Todd

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Re: Power Supplies
« Reply #4 on: January 22, 2019, 06:04:36 PM »
I believe 12v pixels are usually around .7 watts and 5v are .3 watts at 100% all white light. Also don't forget to figure in amps when selecting a power supply.


Amps = Watts divided by Volts

Offline Xmas!

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Re: Power Supplies
« Reply #5 on: January 22, 2019, 06:06:57 PM »
Sorry I posted to the wrong thread haha!
My name is Steve and I'm just getting started. but I think this will become a huge hobby!!

Offline Todd

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Re: Power Supplies
« Reply #6 on: January 22, 2019, 06:10:22 PM »
Deleted.
Xmas you posted this to the wrong thread. didn't you mean to post to the blown fuses thread?
Thought so....
« Last Edit: January 22, 2019, 06:25:55 PM by Todd »

Offline Ulan

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Re: Power Supplies
« Reply #7 on: January 22, 2019, 06:57:21 PM »



Wow, a 1000 watt 12 volt supply is the same cost as 8-10 350 watt 12 volt power supplies. 


**************************
Nevermind, I found some much cheaper, only about 4 times the cost.
« Last Edit: January 22, 2019, 07:20:35 PM by Ulan »

Offline Ulan

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Re: Power Supplies
« Reply #8 on: January 22, 2019, 07:23:56 PM »



So the F-8 distro board has 8 ports each with 5 amp fuses so really it maxes out at 60 watts a port or 480 watts.  (I think)


A 1000 watt 12 volt supply would be able to supply 2 f-8 boards easily.


Online Bwinter

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Re: Power Supplies
« Reply #9 on: January 22, 2019, 07:29:02 PM »



Wow, a 1000 watt 12 volt supply is the same cost as 8-10 350 watt 12 volt power supplies. 


**************************
Nevermind, I found some much cheaper, only about 4 times the cost.

As with everything, youll find a range of prices (and quality).

 

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