4.500 leds. How to power?

Projects General Guidance
1

Hi.

i have 50 rows of 90 leads each. 4.500

Not an electrician. I am been guided by AI's. I think i will not trust my house on flames to them just yet.

this is my best plan. Iam in Argentina, 220 v.

So, 14 switches 20 amp 5 v. I could use 60 amp or 40 but i dont want the noise of their fans.

So, is this ok? Every led is 60ma

but this is my important question.

Can i plug all 14 switches to one house old plug?.....

I won be using the 4.500 leds at full bright, no even close...

if not this way, is a better way to power my growned up"s toy?

thanks for reading

Led strip power with different sources
2

Normally each row of LEDs would be powered by a DC voltage, not AC.

Please post a circuit diagram or link to the product page of the voltage source.

How will the current through each row of LEDs be controlled?

Why not buy strings of LEDs with circuitry designed to operate on 220 VAC?

PS: it is not wise to trust AI advice on something that might kill you and/or burn the house down.

1 Like
3

What kind of strings do you have (web link please).

You should have bought 24volt strings, which draw 20% of the current of a 5volt string,
Did Ai tell you that?

4

Thanks for the answer.

I have ws2812b…

I didnt know it was easyer, power wise, with higher voltage leds. Now i do, but already have my leds lay out. I would like to make them work.

I have 220 v to 5v 20 amps transformer. I cheked the numbers in different AI and that is pretty consistent.

I have two doubts. If i have plug the switches in diferent sockets. Thebinitial current surge.

Each row of leds has a capacitor. I read it draws a lot of current on start up.

I know this is more an electricians forum question but their forum seems to be restricted to profecional and serious buisness.

5

Post a link to the exact strings you have.

Also post a link to the product page for the "220 v to 5v 20 amps transformer"

6
7

Just divide your LEDs in 14 "power-groups". Don't try to setup PSUs in parallel. Data line can be even continuous and common GND of course. You need to apply power injection along the chain.
14x100W PSU will not be problem on mains side. Even 10A line should handle it.
But you didn't mention your board, can it (and library used) handle 4500 addressable LEDs?

8

That eBay link does not advertise strings with 90 LEDs. 30, 60 and 144 instead.

9

You brought me back hope.

i will use Teensy 4.1 / Octo2811 and fastled.

controling 50 strips of 90 leds

Are you sure wall socket can handle??

another thing sis the capacitors on start.

Al least 50. Or 100 if input one on each tip of the rows. Our lords (AI) say they draw al lot of current

10

Thats right. I bought 60 per meter strip and cut them

12

Not familiar with that.

For the rest I don't see anything undoable.
Obviously you use level shifter, keep line from teensy to first LED short etc...

I can't be sure about your wall sockets, but properly made wall socket (10A or higher) should handle it without problems.

13

Yes. I use level shifter.

And yes, considering is a perfect 220v quality socket

but the amount of current it needs is not a problem?

More data. I will start each switch in serie to avoid the initial burst. And i will not use all leds at full capacity.

14

The 74HCT245 chip on the OctoWS2811 adaptor is the level shifter.

Do not use a second one.
Leo..

1 Like
15

Im not using the adaptor, just the library.

I bought 74HCT245 shifters. Or the library only works with the adaptor?

16

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17

Is it 5V DC output?

"Different sockets"

PLEASE can you post a copy of your proposed circuit, a picture of a hand drawn circuit in jpg, png?
Hand drawn and photographed is perfectly acceptable.

It will clarify what you want to do, you don't have to include all 4,500 LEDs.

What is the purpose of your project?
Can you please tell us your electronics, programming, arduino, hardware experience?

Thanks.. Tom.... :smiley: :+1: :coffee: :australia:

18

Not if you have everything regular with your sockets.
14 x 5V/20A power supplies make 1400W without conversion losses. Considering losses and power factor, it's still clearly below 220V/10A .
Usually socket lines are 15/16A.

2 Likes
19

You have 4,500 LEDs and each can draw 60mA? That is a total of 270 AMPS.

20

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21

Ok, as long as you have 5V lines separate.

1 Like