Taidacent 2510-4P 3P Manual 4 Wires 0-5V 12V Fan Speed Controller PWM Speed Control On Off Switch for PC CPU Case Fan with Knob (Solder Connector with Plastic Black Knob)

Exactly what I needed. Worked perfectly, and didn't need any adjustment. I don't have an immediate need for more, but will absolutely buy a handful of them next time I do. Used it to build a low-speed desk fan because I was tired of /literally every desk fan on the market/ trying to knock you off your feet even on their lowest setting and/or sounding like a jet... I just need a bit of airflow to keep me from sweating, I don't need 100mph winds for that. Now I can very precisely control how much airflow I have, and can even switch out the fan for a larger/smaller one if I end up not liking the 120mm one I had lying around from an old PC.

For me this is perfect, but my tested limitations are it was unable to control the one Noctua but otherwise only 3-pin fan I have and tested, and my 4 pin PWM Watahai blower fan on this board's lowest dial setting sounds more like 30% rather than 10%. I've heard it go lower when plugged into a computer. My 80mm Arctic fan and others seemed to scale linearly to the dial setting though. Besides that, this is what i was looking for; a PWM computer fan controller that runs off of any 12v DC source and not USB. I wanted this to repurpose an old Xbox one fan to cool an inverter case for a battery bank, so I had to hack up fan cables and find pinouts then solder to get plug and play perfection but this works great with almost all of my numerous 4 pin PC PWM fan I have. If you want adjustable or set it and forget it 12v fan control for your projects, this is fantastic. I don't think it supports 3 pin fans though it could just be my particular 65mm Noctua fan. For how simple it is I don't think $10 is a rip off but it also seems like it could be at least a little less. Highly recommended nonetheless

I use this product in combination with an Industrial Noctua 4 pin PWM 12V fan to control the speed of a ducted ventilation system. The first feature of value is the red LED that indicates when power is being sent to the fan. The second feature of value is the prominent marker on the rotating knob which provides excellent feedback as to what percentage of the range you currently have selected. The third feature of value is by far the most important. It provided uniformly progressive speed control to the point that the fan turned slowly at its lowest speed. This information was determined by first running the fan with a variable voltage lab power supply and varying the voltage to change the speed. I measured in 1 volt increments from 15 volts down to the point the fan stopped turning. This low-speed point was 5 volts and .19 amps. In stark contrast, this PWM device kept the blades spinning smoothly down to .05 amps. After that point, there was a distinctive click and the red LED turned off. I did not have to alter the potentiometer setting to achieve this perfect performance. The fourth feature of value is the wiring configuration. The red and black wires are easily attached to a very wide range of 12 volt power sources, not just computer chassis. I will continue to use this PWM controller in all of my future builds. I can’t think of any improvement that is needed. In addition, the price is very competitive.

I was unable to control speed on a 4 wire blower. On/off only. No speed control. But I found on our fan that the PWM wire was YELLOW and the Tach wire was BLUE. After switching it works very good!

I'm using this to run a small PC fan off of a 12v source, and it's been working beautifully. Though it can turn the fan off and on using the dial, it also works fine if you use an external switch, which was what I needed. It just brings the fan up to the set speed when you turn it on. The dial and fan connector are good quality and the wires are the right gauge.

Simple little device and works quite well. I would agree with others that the adjustment range isn't quite linear with the knob adjustment; but good enough for most applications. I did add a large electrolytic capacitor to the input on mine given the distance from my power source (about 6-8 feet). I noticed some sluggish operation when adjusting the settings and the capacitor helped remove that. Construction is very good. A couple things I noted that might make it a little better. First, the only mounting method is via the adjustment pot through a panel hole. While the assembly is quite light, it would be nice to have one or two mounting holes (4-40 screws would be great). In an application subject to vibration (in my case this is mounted on my Kubota tractor to control a cooling fan) extra mounting points are a big plus. Second, the led is mounted perpendicular to the pcb. When mounted in my small BUD box the light is essentially useless as it's not oriented to same face as the knob is mounted to. Good thing the fan tells me when it's on. Overall I am quite pleased and would certainly buy another from this seller.

High quality speed control and nice solid click. I bought 2.

Update: used for a couple months; left on for days, zero issues. Controls speed over full range. Used the plastic shipping container as a mount with Velcro. Exhaust system sips very little energy from house battery bank. Has received much more abuse than it would have in a normal PC application. Unusual application. I’m using this with three 4-wire cables in series for a 6’ extension and an old PC fan and new dryer vent duct to hopefully work as air ventilation on a Lithium house battery for remote van life. Little plastic box it came in will be perfect for mounting with 3 holes drilled and cut in. Worked great on initial test. Description says working voltage up to 15V, charging takes it up to 14.4V, so, should be OK if the fan can handle it. Have a second fan for backup just in case. Will update after heavy regular use.