MeanWell LED Drivers: 3 in 1 Dimming Function.

...i saw info (spanish ...sorry) about digital pot... ....hlg - 100k pot.... resistive way... ...maybe with a 104 go? ...

http://www.intersil.com/content/dam/Intersil/documents/fn82/fn8222.pdf

https://sites.google.com/site/tfagerscode/home/digipotx9cxxx

http://granabot.es/potenciometro-digital-x9c104p/

http://panamahitek.com/potenciometro-digital-el-circuito-integrado-x9c103p/

...links are only for examples or ideas...

...maybe with motorized pot.. ...pot + servo?... just joke...

...link to part 3in1 dimming part ii a more advanced approach...

...https://www.rollitup.org/t/3in1-dimming-part-ii-a-more-advanced-approach.855193/

pd... on english.... other dig-pot...

http://datasheet.octopart.com/AD5171BRJZ10-R2-Analog-Devices-datasheet-8546.pdf

http://www.arduino.cc/en/Tutorial/DigitalPotentiometer

pd.... upps thanks wilson... sorry for too links sds....

saludos

Bonjour
Because of my poor English and the technical words, i want to be sure i understand everything.
I have a hlg-185-1400B and i need to dimme it, so from what i understand i do not only need a 100Khom potentiometer, I also need a 10Khom resistor on dim+\dim- wire!?
I foud a lots of potentiometers on alibaba at every prices, the same for resistor. Is there different quality of material or size or anything I should know?
Thanks

littlejacob said:

Bonjour
Because of my poor English and the technical words, i want to be sure i understand everything.
I have a hlg-185-1400B and i need to dimme it, so from what i understand i do not only need a 100Khom potentiometer, I also need a 10Khom resistor on dim+\dim- wire!?
I foud a lots of potentiometers on alibaba at every prices, the same for resistor. Is there different quality of material or size or anything I should know?
Thanks

Click to expand...

...maybe helps a bit... re.read the thread again...

...if you go only on one driver ...yes... you need the 100K potenciometer... and 10K resistor (low limiter) too...


https://www.rollitup.org/t/meanwell-led-drivers-3-in-1-dimming-function.838760/#post-10725098

...As we said ,shorting Dim- and Dim+ ,ain't such a great idea....
...So a "Low Limiter' resistance must be set in series with the Pot .

In case of a single driver ,that Low Limiter should be 10K (Io= 10% of Io_max ) .

...but i know you search better answer than mine too...

pd... upsss on other things....my pov ...this thread its ok for this post too...

https://www.rollitup.org/t/failsafe-for-fan-cooling.873706/page-2#post-11662980



...thanks @guod for other mental seed...

...Wilson... i know.....time to infusion... ...back to the cavern...

Saludos

I dont use the low limiter just 100k pot for one driver. As long as there is light and not running without load or switched off is ok? I mean, you never need such low output anyhow.. ??

...from my pov...low limiter resistor its only for security reasons... ...the resistor limiter its cheap...
but heyyy...some people use protections... others not...

...your self...

...i prefer go with protections on electricity or electronics... but im not an expert on electronics... i prefer follow the sds security instructions... ...but heyyy ...its only my opinion...

saludos

Bonjour
Thanks for the good (best!) answer
I will go with one now but I will go with two later...but we will see that later.
One last: I saw there is 0.25W/1W/3W 10K ohm resistor wich one should I use? And is there any specific potentiometer, cause I saw some for electric guitar?
Thank salmonetin
Have a great day★

littlejacob said:

Bonjour
Thanks for the good (best!) answer
I will go with one now but I will go with two later...but we will see that later.
One last: I saw there is 0.25W/1W/3W 10K ohm resistor wich one should I use? And is there any specific potentiometer, cause I saw some for electric guitar?
Thank salmonetin
Have a great day★

Click to expand...

...i told you... i know you search better answer than mine...

...maybe helps a bit... re.read the thread again...

...sds words... (i edited the color a bit only for helps)...

There are two main types of pots :
Linear and Logarithmic.

http://www.beavisaudio.com/techpages/Pots/
http://sound.westhost.com/pots.htm

Linear type pots are the ones of interest .
Dimming with them , is smooth and ,of course, LINEAR.

Low cost Pots usually have an action of a (almost) single turn
( 0 to max resistance value )
and can dissipate about 1/4 of W ,
meaning 250mW .

( A single low -cost pot can control up to ...~ 50 drivers ,
before it's resistive material heats up and fries ...)

...if the low cost linear pot its 1/4 of W , and go ok ... i assume the same valor for the resistor 1/4 of W too...

...I told you Wilson... ...yeah back to the cavern... need more infusion time...



saludos

salmonetin said:

...from my pov...low limiter resistor its only for security reasons... ...the resistor limiter its cheap...
but heyyy...some people use protections... others not...

...your self...

...i prefer go with protections on electricity or electronics... but im not an expert on electronics... i prefer follow the sds security instructions... ...but heyyy ...its only my opinion...

saludos

Click to expand...

Thanks salmonetin, I like your post too.

Still resistor seems a little overkill. Meanwell HLG has short circuit protections, I was trying to find a reference for this short protection, for these particular drivers from SDS?. Iv'e actually switched my 100k pot off a few times before ever considering/ reading about unloaded driver (I suspect i'm newer to this also but I stick to the most basic unless I fully understand the advice). You'd never have a reason to go anywhere near 10% limit on a 1.4a driver? Another weak link in chain? (this isn't my opinion, i'm still forming one I should have asked sds, there could easily be something iv'e missed)

...sorry for my bad and short english... ok i try...

...from my pov ...the limiter resistor its not a short circuit protection... its a minimum charge on the dim side...

...its not good for the driver... dimm to 0 (same as shorting dim wires)... better go 10% minimum for best life of driver...

...better go on 10% minimum charge on dim circuit for run the driver on better security zones... (we not forzate to work the driver on the cero zone...

...resistance is for we can not lower than 10% minimum values... not for short circuits... my inexpert pov offcourse..

...and sems to me... ...sds its more out than in... too much problems in greece... ...he say no got time.. he is a grow farmer too...

...i add ...not time for forums... the cruel and hard day by day on grece... tell me the rest....

...my best wishes for sds and family... i hope sds are ok with all of these shit ...be safe bro...

pd... first Guod... then SDS... fucked for greece problems.. and me myself and i fucked for the crisis too... european crisis... crash the old european team... ...We'll always have Paris... said old movie...

...for sds and me ...tomorrow its another day in "paradise"...



Salud..os

Yeah, all cool mate, I can put together what you write. I gather that sds was not around much now. Must be an awful position to be in for Greeks with an uncertain, certainly bleak, near future.

I don't understand what is happening inside the driver with capacitors charged and no load, beyond my knowledge the potential damage, not good I accept. Whether or not 'no load' triggers a protection upstream of driver damage?

I understand that it is possible to make this 'no load' state impossible with a resistor (not allowing less 10% load). It's just not something that I could ever see happening so long as you are in a lit position, which is always the case.. otherwise you'd be off at the wall. meh, maybe I should just use resistors and leave it at that.

I'm actually finding that I would have been just as useful to switch on a lower powered driver or half string for veg, solid on/off, no current draw.

Sorry to confuse the discussion with others wanting help above, resistors (low limiters) are pretty reliable I guess and this is obviously the best way to set up a pot.

Dear @stardustsailor ,

I put together your pwm dimming circuit and it tested perfectly putting out 1.5-10.5V at the DIM+/- exit, but as soon as I connect my MW LCM-40 (officially supports 10V PWM and 10V analog dimming), i only get about ~3-5 V and the driver only puts out about that much light (visually less bright than the full ~600mA I selected via the dip switches, connected to 2 cxb3070).

Do you have any idea on how to fix this? I wanted to dim the light rather low to not blind myself.

Thanks in advance!

no help without a circuit schematic... can´t find a PWM circuit by SDS

I built the circuit based on this: https://www.rollitup.org/t/meanwell-led-drivers-3-in-1-dimming-function.838760/page-2#post-10727435

I use an Arduino Mega, with a 4K7 Resistor between Arduino and Transistor, using Pin 10 what should equal to ~490Hz PWM frequency.

holy shit, whats that ! to much OUZO

this is what you have to build...

there is one Problem with the Voltage Regulator.
the Input Voltage (12V) can be to low for the 7810 IC´s

Thanks @guod I'll have a go at it tomorrow. The 7810 did put out a bit over 10V, when I remember correctly the driver accepts everything under 11 or 10.5V.

Bonjour
A little question...is there a difference dimming with a potentiometer or a pwm??? What the point of makikg it more expensive and longer?
Or maybe pots is for noobs and lazy while pwm is for pro and electrician?
Tell me...
Have a great day ★

@littlejacob my driver doesnt support potentiometer dimming and for automation pwm is better... but your mileage may vary

littlejacob said:

Bonjour
A little question...is there a difference dimming with a potentiometer or a pwm??? What the point of makikg it more expensive and longer?
Or maybe pots is for noobs and lazy while pwm is for pro and electrician?
Tell me...
Have a great day ★

Click to expand...

dimming with a pot also named as (CCR/constant current reduction) has some benefits in efficiency.
the downside is a the change in CCT or Wavelength, but this is negligible for Growlights

PWM on the the other hand is stable on CCT and efficiency.

Bonjour
Ok so dim light change the wavelength!?
I heard that about lumatek ballast...not to use dimming functions because of this.
Do you know how does dimming affect the wavelength? Is it become "hotter" when dimming down or the contrary?
This could be useful to know
Have a great day ★

Really ??

Like littlejacob, i'd be grateful if you could explain a little more the how and why, please.

Thanks

guod said:

dimming with a pot also named as (CCR/constant current reduction) has some benefits in efficiency.
the downside is a the change in CCT or Wavelength, but this is negligible for Growlights

PWM on the the other hand is stable on CCT and efficiency.

Click to expand...