Mini LED Dimmer Knob with Rotary Control Switch - pwm dimming for 12-24V LEDs, Fully Waterproof, dim up to 4.8A at 12V or 2.4A at 24V: car Automotive, Marine, Low Voltage Under Cabinet Lights

I bought this little dimmer to use on my pontoon boat interior lighting project. For my project, instead of LED strips I used single LED marker lights like what are used on trucks and trailers. I installed 6 of them around the inside of the boat. This dimmer works very well with them to give me a wide range of brightness from full on to almost imperceivable if I want it that low. The max current handling capability for the dimmer is 4.8 amps. These LED marker lights don’t even draw a full amp so there’s no danger here at all. The dimmer works by being placed in series with the circuit’s ground side. The instructions don’t say that but as an electrician I know what’s going on inside based on how it is wired up. Well, I didn’t want a hot wire that wasn’t switched also, so in my video you will see that I wired it up so that I push a button to turn on power to the hot leg of the circuit, and then use the dimmer on the ground side to control the brightness. This is not necessary to turn power off because the dimmer does have a positive click to break the circuit. But it leaves the hot leg on all the time and I’d rather break that as well. Also you will see that I placed the dimmer knob and buttons in a switch panel I installed that normally has 12v sockets or USB ports in these locations. If you want to do that, just buy some 30mm blank plugs for these locations and then drill out a 19mm (3/4”) hole in them to hold the switches. It’s tight and kind of hard to install using screwdrivers up inside the plug to work on tightening the nut holding the switch in, but it can be done.

I had been looking for a compact high quality dimmer for panel lights on my experimental airplane. This unit just feels like high quality, will fit right in on my panel, has smooth operation, including the on/off switch, and I like the choice of knobs. This type of control is capable of controlling VERY small LED or incandescent lights and up to its full capacity. I tested it inches from a portable aircraft comm radio and found no RF interference that I could hear.

Worked great, have an off-road light on my Harley that I have wired to stay on bright. Sometimes I don’t want them THAT bright. Took all of 3 minutes to put on and now I can set the light like a house light dimmer on the fly

Excellent build quality. Need to determine yet if this will work for my project.

Good features: Two knobs included, one each silver and black. Wire lead quality is good, adequate length and with insulation that feels like silicone. Pictorial wiring instructions easy to follow, (schematic style should also be include for us old electricians and others who prefer schematics.) Knob turns smoothly and easily (if you don't push it on the splined shaft too far when mounted through a thicker panel). LED ramps up smoothly from dim to full brightness. (Note that there may be a threshold voltage where the knob moves a bit before the LED turns on dim - this is a function of the LED rather than the dimmer.) It comes in a presentation grade little box with magnetic closure. Save the packaging frills and reduce the price 20% or so. In the interest of full disclosure, if I needed another, I'd buy it again .

Using this to power two small LED lights in my aircraft. Since the aircraft is amateur built, it took me a month past the return date to begin to use it as intended. It worked fine at first, then would flash the lights when power was applied, then the lights would stay on steady whenever power was applied, and with no way to turn them off. Junk, and for the price it should last. Junk

Excellent dimmer switch. Feels very high quality, super smooth, definitely worth the money

Seems to work ok, but they are pretty cheaply made, especially for $24.99...so I would say they are overpriced. I ordered three of these, and the first one I installed broke immediately after installation. In order to actually mount the dimmer behind a surface, you have to take the decorative knob off to fit it through the hole you drill. The knobs just pull off and the stem (that is the actual dimmer control) is all plastic, including the the threaded portion that you attach to. Once I got it mounted and locked in place with the retaining nut, I went to put the knob back on the stem. Due to the force required to push the knob back on, the stem just broke loose from the plastic threads. If that part were metal or stronger some how, or the knob didn't require as much force, it would probably have been ok. I think the pressure of trying to install the knob back on the stem forced it to fail at the joint where the threaded portion is held on by the nut. The dimmer still worked, but the threads were broken off, leaving the dimmer unit now unattached, and no real way to reattach it. Fortunately I had bought extras, so I was able to just use another one, and this time I didn't bother trying to put the decorative knob back on for fear of the second one breaking.

Super nice little 12v dimmer switch. Even dimmer lighting with a positive click on and off. Pricy but worth it.

Yet to test waterproofing but works. Low range dimming not effective but may be LEDs themselves

Very nice dimmer, works as intented, the dual knob is a plus! botom is sealed in some silicone rubber so no chance of shorting is installed to close in a metal enclosure Only downside i see it's that the terminal block faces upwards to cable come in a little weird position but that's not a real issue!

We followed the instructions carefully. We used quality, dimmable lights. We tested with different power sources, polarity and different lights. Could not get it to work. Really wanted it to. The reviews sounded great. If we are at fault, happy to review the review.

Looks week built, good materials, instructions are good, however my Toyota car only has two leads the exact same colour, and this one three so I have not been able to figure how to connect it.