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Thread Tools | Display Modes |
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#1 |
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![]() Hi!
I am looking to dimm 230V AC -> 12 DC LED driver with potentiometer. How do I know if I can dimm LED driver with potentiometer? I found from internet that 0-10V dimmable drivers can also be controlled with potentiometer. Is it so with every driver that says it is 0-10V dimmable? Or how do I know which are and which are not? |
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#2 |
Solder Sloth
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![]() answer is: the driver's specs will tell you.
You typically cannot dim with a potentiometer due to the losses involved in it when passing current unless it has a special connector for a dimmer potentiometer. |
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#3 |
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![]() How does it look like in specs? Do I need to read entire manual or does it say it plainly in specs? I cant find this anywhere when I look at products. I am currently trying to figure out if shops in my area just dont list this in specs or if I just dont know what to look for.
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#4 |
Badcaps Veteran
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![]() What drivers are you looking at or what LEDs are you trying to drive ?
You can use any 12v power supply along with a PWM controller to limit current. https://www.aliexpress.com/item/32843955706.html |
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#5 | |
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![]() Quote:
__________________
9 PC LCD Monitor 6 LCD Flat Screen TV 30 Desk Top Switching Power Supply 10 Battery Charger Switching Power Supply for Power Tool 6 18v Lithium Battery Power Boards for Tool Battery Packs 1 XBox 360 Switching Power Supply and M Board 25 Servo Drives 220/460 3 Phase 6 De-soldering Station Switching Power Supply 1 Power Supply 1 Dell Mother Board 15 Computer Power Supply 1 HP Printer Supply & Control Board * lighting finished it * These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10% 1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later ) 2 Hem Saw Computer Stack Board All of these had ![]() All of the mosfet that are taken out by bad caps ![]() |
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#6 | ||
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![]() One more question, if I want to use led powersupply/driver with actual dimmer instead of potentiometer as asked earler? Does every model support it or should I assume that if specs dont mention dimming then it does not work with dimmer?
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#7 | |
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![]() Quote:
When you say LED strips do you mean the 5m rolls of white or coloured LEDs ? They are powered with a generic wall power supply and have a controller that plugs into that that does the dimming/colour change, controlled via a remote or phone app. |
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#8 |
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![]() Yes, 5m rolls.
But how does this aliexpress controller work that was linked above? Does it go between power supply and LED strip? Or do I have to open power supply and somehow modify it so that IC would get it's feedback from that instead of voltage divider resistor or what? It's kinda confusing me. I mean most of general purpose power supplies dont have sockets for external current controllers. |
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#9 |
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![]() It would be much easier for you to get a kit from Ali with the power supply, controller and remote. Just put in LED strip controller into their search.
My previous link is a cheap way to drive larger panels. |
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#10 |
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![]() Since you mentioned a new way that I have not heard before I wanted to know how it works from technical side. Whether or not I use is not important. Just wanna know how it works. Does it replace IC? Does it inject some code modifications to IC? Does it require led driver to have special connector to talk to it or how does it work?
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#11 |
Badcaps Veteran
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![]() The inputs connect to the + and - of a power supply and the outputs go to the LED.
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#12 |
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![]() Ah ok tnx. Then it's basically a step down converter? Or what's the exact difference? Why is it sold under speed control name instead of step down? And if for example I had motor and I used step down instead of this speed controller, would there be any difference? Just trying to understand how it works and how it is different from other similar stuff.
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#13 |
Badcaps Veteran
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![]() No, it doesn't step down the voltage it controls the current.
The step down modules have crappy little multi turn potentiometers, they can be used but are fiddly and not easily adjusted. The current controllers have a decent sized single turn pot. |
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#14 |
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![]() But output is still smooth DC? So basically step-down with single turn current control potentiometers?
Also how does this thing work? https://www.aliexpress.com/item/32873844140.html Is there any technical difference compared to speed control? searching for it the internet seems to reveal that it has no capacitors so I guess it's quite bad? Basically an other version of step-down but this time just without capacitors? |
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#15 |
Badcaps Veteran
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![]() No, not basically step down. It does not alter the voltage. Step up and step down refer to the voltage being either stepped up or down.
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