TC420 with LDD-H
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- čas přidán 7. 09. 2024
- Dimming test for TC420 with LDD-H (acvariu.ro)
Used:
- 1 x TC420 led controller
- 1 x Meanwell LDD-H 700 driver
- 1 x 24V~20A power supply with variable voltage
- 10 x Philips LUXEON Rebel ES Royal Blue 455nm leds
As total voltage after LDD-H is 22V, had to bypass two leds to have enough voltage to reach 700mA through leds.
Project started 26/03/2016, electric and engineering concept sorted 12/06/2016. Final product pending (next wage).
Future purchase list:
- hole drilling bit for 120mm (aluminium holes) and guide
- drill bits, including sanding and smoothing bits
- 5x LDD-H (4x 700mA, 1x 500mA)
- 140mm Silverstone SST-FW141 PC Case Fan
Special thanks to the colleagues on acvariu.ro forum, for their patience and tollerance of my ignorance, especially:
- liv1305
- alexiumihai
- Akaiu
- darthradu
- Lucian
- rodoselada
- adiradu
- Pseudonimuss
- dan.pavelescu
- koala
- Shubi
- liv1305
A special mention for liv1305.
Link: www.acvariu.ro/...
Did I mention liv1305? Many thanks!
I don't bother with the Meanwell driver , just use a 24V power supply with 7 HP LED's (1W-350 mA -3.4V) in series.
Add a 1.0-2.3 Ohm resistor and voila , you can keep adding series to parallel circuits until you reach the limit of the 4A/channel , and that's a lot of light.
Same calculation for the 3W-700mA LED's.
Just avoid the red's , you can do it but they're only 2.2V each , put 10 in series if you need this wavelength and add a 2W 4.8 ohm resistor in the circuit.
My problem with this approach is that LEDs can and will burn, causing increased load on the other still working series.
Resistors and danger of overheating in case of some LED failure increase the risk of an electrical fire, which is a big No-No for me.
@@um02122 Each series has it's own resistor , 1 resistor per string of 7 led's , the load on the others remain the same.
If one of the led's in the string burns out , usually the circuit is broken and the 6 others won't work either , you'd need to figure out which one to replace.
So far I have had no problems at all.
One of my systems has been running for 2 years with this configuration , no failures at all.
you need to be careful with the supply voltage and make sure it doesn't fluctuate.
1 of my systems runs on a powerblock like that of a laptop , the other is a dedicated power supply like that in a desktop , it has a pot that you can control the voltage with.
The calculated resistor load on my series is only 1/8 watt but I use 2 watt resistors so heat dissipation is negligible.
@@um02122 It looks like you're using the same heat sinks as I use , 300x140x18 , I have 4 of them above a 160 liter reef tank (900 x 450 x 400) , all with 1 watt(350mA) led's for better spread , mainly 450 and 470 nM wavelengths with additional violet 420 nM and 20K Kelvin white , total system is 112 watts (16 strings of 7 led's).
It has only passive cooling , no fans , running at max. 80% (blues) per channel of the 420 controller , the heat sinks just get warm to the touch (dissipating 28 watts/sink in free air at max. load) .
I bought everything on E-bay from Chinese sources except the heat sinks (from Amazon , $16,- each).
Total outlay , ($16,-x 4 heat sinks) , led's on star plate (average $0.12 each x 150) , resistors (20x $0.20) adjustable power supply ($28,-) 6 pole aviation connectors (5 for $6,-) some aluminium and wire , say another ($25,- ) , total cost $145,- for a 112 watt system with very even spread.
I could've saved close to 40% by using 3 watt (700mA leds) but I would have to raise the height to distribute the spread of the light (with a 2 heat sink system , but would need fan cooling).
All costs are in Canadian $ , multiply x .75 for approx. Euro
@@planet4allofus this was a test only, with cheap leds.
I've not ended using the heatsink or those leds in any fixture.
I've got to date three led lamps done: two blackboxes with TC420 controllers and an in-hood for a RedSeaMax 130 (BlueFish wireless controller).
I've used LDDs on all of them.
The main points of failure for me were: the user (everytime I drop them in saltwater I end up changing the fan) and the power supply (the 180W Chinese bricks, tend to fail after one year, about $10 each).
@@um02122 Not much survives in a saltwater bath , not even the most expensive dedicated light fixtures.
Electronics don't seem to like the procedure. :)
You're lucky only fan failed as your controller is outside the fixture.
Most dedicated systems with all the electronic controllers in the fixture would be history.
Thanks
hello, what if I want to have >24V driver supply. Do you think there is a way to achieve that? Thank you
It is fascinating for me how a video I've made for some friend gets so many unlikes.
I'd say, move on and don't come back.
I don't monetize my channel and I'm not a "youtuber" "trender" and whatnot.
And I do not care for number of subscribers.
you should,if the video was to be monetized,and you had subscribers ,retention rate is high,can be classified as an educational video .Pay rate is 20 euro /1000 views .
P.S. Take out the f .. music. It s annoying.Use youtube editor ,or something.
@@bor1422 I've de-monetised ALL my videos a long time ago. I'm not really interested in making money on youtube.
I'd say you're right about music, I put something in tune with how I felt at the time.
I guess my subscribers are as weird as I am.
Don't worry , there will always be haters , I admire the ones that take the time to create the vid's to help others without intend of personal gains.
We can all learn from each other and if you disagree a proper valid reply is useful for all and shouldn't be seen as criticism.
That's how I see it , there are many ways to skin a cat , all have their positives and negatives.
Добрый человек, можно схему или видео как подключали
Is that 3w LED?
"As total voltage after LDD-H is 22V, had to bypass two leds to have enough voltage to reach 700mA through leds."
for 10 or more, what to buy?
You'll need more voltage eg.36V or 48V source, a LDD-H driver and a PWM controller (TC420 supports 24V max).
Alternatively, you could run 5 led series through one LDD-H and use two LDD-H on a channel - this allows you to use a TC420 with a 24V power source.
@@um02122 ок! Thanks
Hi, thank you for video. Can you show how you wire tc420 and LDD? To which LDD pins you wire cables which going out from tc420? I am confused because LDD have more than 4 pins. Thanks in advance.
R Gen Please see here:
www.acvariu.ro/forum/posts/list/200/36620.page
Thanks for quick replay. so only one way to do that is to crack tc420 I mean i need wire cable from mosfet pins? I want to us 5x10w led's on 5 channels. I have 5 X LDD 1000h and constant current supply 12v. 900ma. in the link which you posted there are two power supplies?I have only one.
R Gen Do the led wiring bit and then try using just the two ldd wires, without the dimming one attached. While the dimming is not as accurate and you don't get 1-5% dimming in smooth steps, might be good enough. That's what I've eventually done with my lights. So you can get away without opening the controller, if you don't mind the limitations.
Hi, thanks again for quick replay.
Now I start to get it.
If I want not to disassemble TC420 and run 5x10w LED's I can do: 12volt positive and negative goes to TC420 positive and negative input. Also 12volts negative goes to LDD negative VIN. LDD VIN dim goes to any of 1 to 5 TC420 CH. And LDD VOUT negative and positive going to LED string. So in this way I will get dimming but not very smooth?
And if I want smooth dimming I need additional >24V DC power supply negative wire connect to TC420 input negative and > 24V DC power supply positive connect to LDD positive pin?
Can I use 12v DC power instead of 24v DC power supply?
Thanks in advance!
R.
Dede Rimkantas TC420 accepts voltages up to 24V.
The voltage of the TC420 is the voltage on the connector's side too, so you do not need a second power source.
As usually the LEDs are using a Vf around 3.5V for the nominal current (constant due to the LDD), a 5V supply will power a single LED on a channel, a 12V supply will allow a 3 LED series on a channel and a 24V supply would allow you to use 6 LEDs per channel.
что за реле
TC420 led controller
Meanwell LDD-H
WTF???