Delinx USB 5V to 5-12V Adjustable Fan Speed Controller, 4.8FT Cable, DC5521 /4Pin/3Pin/2Pin Fan/Pump Governor, for PC Case Cooling Fans, Water Pumps, DIY Projects

Super easy way to tap power from usb port to power a 12V computer fan. I use it to control a PWM fan and it works really well, allowing me to adjust full spectrum of speeds.

This is currently powering two fans venting heat from a recessed fridge and been running great for the past 4 months.

I've bought it to adapt a 4-pin 80mm fan to be used with an USB port. Turns out it works really fine. I've tried with a 120mm fan but the USB port won't provide enough power I guess. Since I needed it to be used with 80mm fans, I haven't tried but maybe using it with a 12V USB power adapter could work with 120mm fans.

I acquired the PC Fan Speed Controller primarily to test PC fans, given my interest in conducting product reviews on Amazon. This tool has proven to be surprisingly useful in this regard, providing the ability to test various fans before they are used in their intended applications. As someone who built a custom gaming PC filled with numerous RGB elements, I found the controller beneficial, not for the PC itself, but for the associated creative explorations. I've considered using it to control fan speed in future enhancements and engineering projects. An unexpected potential application came up with a side project I had in mind - building a larger external desk fan composed of couple dozen 120mm fans. This product suddenly made the idea a tangible reality. With the ability to bypass a PWM connector on a motherboard for controlling fan speeds when paired with other external devices, this adapter has opened up new possibilities. I wouldn't recommend this device for controlling fans within a modern computer system. That responsibility should be handled by the computer itself. Despite this, the product has proven its worth in ways I hadn't initially anticipated and I'd recommend it to those who understand the nuances and risks involved, such as product testers, inventors, and engineers. As you can see in the attached photos, this controller lets you circumvent the need for a PWM connector on a motherboard to control fan speeds, when paired with other external devices. I suspect this is how many product reviewers showcasing computer fans operate. The quality of the product was as expected - sturdy and well-constructed. The switch to control the fan mode (reverse and forward) was quite finicky, requiring some effort to operate. The cable length was sufficient for testing fans placed in front of me, and I can envision its potential use for managing fans positioned further away, like in my larger fan project. A point of curiosity was deciphering what the slider represented in terms of power draw. Adjusting the "fan speed" by sliding the wheel was simple enough, but I wasn't entirely sure what it meant. Was 100% on the controller equivalent to the fan's maximum capacity, or just a controlled speed set by the manufacturer? This product performs as intended - enabling the adjustment of a 120mm fan's speed without needing to connect it to a PC motherboard. While the application of such a product may seem limited, this isn't a drawback of the product itself. I would recommend this controller, but with a few reservations. The ability to reverse fan rotation was a concerning feature, as that's not how PC fans typically function. To alter airflow, a fan should be physically flipped around, not have its power supply reversed. Reversing the polarity of a PC fan could potentially damage the fan, causing the motor to spin the wrong way or placing undue strain on the bearings. This could result in increased noise, reduced performance, or even complete fan failure over time. Ensuring correct polarity before powering any electronic device is critical to avoid potential damage. In light of this, I would recommend this product to product testers, inventors, and engineers who understand the nuances and risks involved. However, for the average person building a computer and looking to control fans externally, I would advise caution. The risk of damaging equipment, even a simple 120mm fan, seems too high and not worth taking.

Not much to say about this other than it works as intended. Variable speed control but I’m not sure it’s actually outputting 12v. It is still perfect for what I needed and I’d buy this again if I have another project.

Even at full speed, which should be the step up to 12V, my 200mm Noctua fan requires a "push start" to work with this and even then it only gets up to a fraction of its maximum speed, despite only needing 0.96W. I'm assuming the amps just aren't there after the 12V conversion, and I know the issue is not my USB source(s) I've tried. I can't find the amp supply anywhere on the product info as well, sadly. There's also an audible electronic ticking noise that comes from inside the speed controller that is persistent and obnoxious. Just seems underpowered for a 200mm fan. Look elsewhere if your needs are that beefy.

It's simple and has proven durable enough for daily use. Having the barrel connector makes it easy to test other DC equipment.

love that it got a fan speed control wheel and power on/off button so that i can tweak my fan when when required. It’s also easy to install, just plug and play. Cable is relatively long (like around 2m after connecting both sides)

Didn't fit my needs, but product stems good.

Der Preis ist etwas hoch, ansonsten hab ich nichts zu meckern Das Kabel steuert bei mir einen selbst gebauten Lüfter.

Now I can control and power a standard PC fan from a regular USB port. It's useful for my little DIY project. And actually there are not many alternative products...

Die USB Lüftersteuerung ist genau wonach ich gesucht habe, ich nutze es um damit meinen Arbeitslaptop zu Kühlen, hatte noch 2x Noctua Lüfter und ein Y-Kabel rumliegen, welche ich mit ein paar Schrauben als Abstandhalter(zum Boden) unter meinen Laptop gestellt hab, jetzt ist er dauerhaft ruhig. Die Lüfter gehen an wenn der Laptop angeht und gehen aus wenn der Laptop aus b.z.w. in den Energiesparmodus geht. Man kann mit dem Rädchen die Geschwindigkeit steuern, was bei meinen Lüftern auch tadellos funktioniert obwohl es eigentlich PWM-Lüfter sind.

Works. Powering 3 arctic p12s with no issues so far.