# The led tape has real power consumption

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• Level 18
I am planning to mount the 5630 NW led strip in the bedroom with the intention that it should be the main lighting.
The lighting will be divided into 2 zones and controlled by milight FUT036 modules.
Initially, I ordered 2 modules plus a remote control and 4 tape rollers.
Going to the heart of the problem, each of the controllers according to the manufacturer has a current efficiency of 6A.

Tape according to the manufacturer gets 18W / m.

From the law ohma comes out that the driver will handle max 72 Watts or 4 meters of tape.
I connected the Zhiaoxin RXN-015D laboratory power supply with a current capacity of 5A to the whole 5m roll and the current consumption at 12V did not exceed 3A, which shows that the whole 5m roller draws 36W.
As a photo proof.

https://youtu.be/xWhEK0yKeVg
I have provided 2 pcs of 200W power supplies (one for each zone) and now I am in the head or did not tow over.
• Level 38
marcin_marcepan wrote:
which shows that the whole 5m roller takes 36W.

And this is the real value. Products made in China do. What is another advertisement, something else is real.
If you apply a current driver to the power supply, you will take out more of these LEDs.
• Level 18
Maybe Chinese products do, but the question arises whether the driver can handle 10 meters of tape or smoke, which I would not like because it was relatively expensive.
Current driver for led strip? They are connected in parallel!
• Level 36
marcin_marcepan wrote:
with a current capacity of 5A to the entire 5m roll and current consumption at 12V

With such a large difference (7 vs. 18W / m) to clarify whether your tape is actually 18W / m, it would be worth looking at what resistance occurs in the tape segment (for 3 LEDs).
I just have such a tape, exactly 18W / m (measured) and for example the segment looks like this:

for the "spread" of power, 6 resistors of 39? connected in two series connected in series (three resistors in parallel) are used. That is, the resistance of the 26? circuit in the LED circuit. And somewhere in this order, resistance should be on tapes like that.
See how it is on your tape (it may be different in details, only the resultant resistance in the LED circuit is important) or upload a photo.

marcin_marcepan wrote:
I have provided 2 pcs of 200W power supplies (one for each zone) and now I am in the head or did not tow over.

Well, 400W in LEDs per bedroom is impressive .
But basically it's just a matter of material costs, as you've already bought.
You do not have to use full power after all.
And in practice, you have the comfort that you have a reserve if you would like to use, for example, only indirect lighting (reflected from the ceiling), pleasant but not very efficient. You also have a reserve for possible local lighting, extension, etc.

And the current efficiency of controllers does not bother so much, because you can electrically separate some larger circuits into smaller segments and use so-called. LED amplifiers (available and cheap solution, just for that purpose). So that practically the controller can control any heavy load.
• Level 18
In my tapes, there is one 240 OHm resistor for each segment (3 diodes)

As for the material costs, I do not care because there are other rooms for lighting and there I will use "surpluses" but actually in the bedroom the whole will be based on the reflection on the ceiling. 100% of the power used up to 2 hours / day
As for the use of amplifiers, this is basically the whole subject. According to measurements, I do not need them at all, but according to the manufacturer's parameters, they will not work without them and here I am in the middle because I do not know whether to run an additional installation.
• Specialist electrician
marcin_marcepan wrote:
In my tapes, there is one 240 OHm resistor for each segment (3 diodes)
240 ohms or rather 24 ohms?
Speaking of reduced power - maybe you have too little voltage on the power supply?

pzdr
-DAREK-
• Level 18
everything is visible on the pictures and film, so where is the problem?
• Level 40
And power the tape from two sides.

The three LEDs take about 100mA, multiply by the number of triples per 1m
• Level 36
marcin_marcepan wrote:
In my tapes, there is one 240 OHm resistor for each segment (3 diodes)
The led tape has real power consumption

Well actually. It is 24?, which is the most typical value for 18W / m, but (if we reject the possibility of test error) it is evident that the Chinese inserted diodes with extremely high conduction voltage (practically unsuitable for use in this system).

I do not know if it makes sense to fight it, for example by replacing resistors or turning up the power supply to a higher voltage (some are adjustable).

I guess it's better to simply treat this bar as 7W / m (because that's what you've measured) and it's the only thing to do, both from the electrical and light sides. And the voltage of diode conduction with aging increases. So that there is no risk that over time it will "fix" itself.

And only in the event of any future expansion or modification, when you reach the maximum current of the controller, add an "amplifier".
• Level 18
Following the advice of my HD-VIDEO colleague, I connected 1 module (3 led) to the power supply and the current consumption at 12v power supply was 0.08A, so the tape actually has 18W / m (300led / 5m)
For that I found out that my laboratory power supply (most likely) has no declared output current of 5A.
Now I am convinced that the 200W power supplies will be suitable and without "amplifiers" the LED will not work.
The original 1 channel with 6A output current cost about 12 PLN so is there any simple scheme to do it on your own? (I will need a minimum of 4 items)
• Level 36
marcin_marcepan wrote:
For that I found out that my laboratory power supply (most likely) has no declared output current of 5A.

Very strange, because on the video I clearly see that you have a CV lamp and you can see the 12V, which sits down but only at a low current setting.
But I see that the power supply is also Chinese, maybe I do not have any philosophies.
In any case, it would be good to power the whole tape and measure the voltage and current on the tape with the multimeter.
But the segment takes the most correctly.

marcin_marcepan wrote:
The original 1 channel with 6A output current cost about 12 PLN so is there any simple scheme to do it on your own? (I will need a minimum of 4 items)

In fact expensive, I've seen 3x6A RGB amplifiers for half that price.
And, after all, you can use RGB amplifiers (at the most, by rewriting the cables). They are basically three completely independent tracks, identical to those in single channel channels.
In such an amplifier, you bridge the RGB inputs with you and get three tracks of 6A each.
So, if there are no problems with the wiring geometry, with only two RGB amplifiers (cheaper than these one-channel amplifiers), you have 6 AHUs controlled 6A plus 6A in the PLC branch, or 42A (500W !!!).
Take a look at this RGB because I think with this solution, if you still need tracks of amplifiers more, there is no economic sense to peel your own amplifiers. Although they are not a problem, but a good few zlotys in the material itself, you have to give (MOSFET + inverter + cables + PCB).
• Level 18
I'm also pretending over RGB amplifiers.
Each of the sectors will download max 15A so the cheapest what I found is a RGB 3x4A amplifier for PLN 15.
So it goes out 3x4A plus 6A from the whole x2 driver, or 30 PLN.
I will save some PLN 20 which will go on wires to separate sections (I have a lot of maneuverability).