RioRand12V-40V 10A PWM DC Motor Speed Controller with Knob-High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection

I used two of these as a means to control the blowers on my fog setup last Halloween. They did a fantastic job of regulating the blower speed. I mounted them inside a wather tight box for protection. Conection were super easy and they worked flawlesly.

Nothing wrong with this! Its a PWM speed controller so it enables you to control the speed of these little DC gear motors smoothly. I used one on a DIY motorized camera slider/dolly to get the slider moving at the exact right speed and another on a turntable - both worked great.If you want a small 12v motor with speed control then this takes care of the speed control part. The motors I used with it are both the "HOSSEN® 30RPM Mini Gear Box Electric Motor 12V DC 37MM High Torque", and the "RioRand® DC 12V 0.07A 3.5RPM High Torque Gear Box Electric Motor 37mm". Both of these motors are on Amazon as well, so for the price I think its a good deal to get something motorized. They both ship from the USA and arrived fast, so just watch out for the ones that ship from "overseas" that take weeks to arrive - if you are concerned about getting it soon.There's no instructions with it, but there are 4 screw terminals to attach the wires - 2 for the power supply and 2 go to the motor, and once you connect them you have speed control of the motor. One thing worth noting - the screw terminals are not clearly marked when you are looking at it from the angle shown in the image above, but if you see where the screw terminals are and then turn the board upside down you will see it is written on the reverse side under each terminal. If you are going to screw it down before you attach wires its worth writing down which wire goes where as you won't be able to see it once the board is screwed down!Summary, good product for the price.

Works well to turn down the 12 volt fans on our fireplace, which crank out great volumes of hot air, but are pretty loud, so I added this to be able to turn them down when the fire's not real hot. Only challenge was figuring out a way to mount this device in an electrical box. It would have been nice if it came with a simple cover to protect the electronics.

This controller works well with my motor project. Fast shipping and good cost. Happy with purchase.

bad product from the start would not work .

Running a 12volt muffin fan, 90% of the reastsat does nothing, 0 to full speed in 10% of a turn. Kind of stuck at this point

I did my research to see what I could use to make a heat troller for my heated gear. I ended buying this component. I ran the wires from my motorcycle battery (with an inline fuse seperate from the one shown) to the unit and from the unit to my heated gloves. This controls the temperature just like a regular heat troller from 70 bucks. I boxed it in a container I had laying around the house and mounted discretly on my bike. A little silicon to make it water tight and of I go. When I didn't have this I only used a toggle switch to turn my gloves on and off. This got annoying. My gloves were either too hot or just off. On cold days around 45 degrees going around 60mph a quarter to half power is all I need. I still use a toggle switch to disconnect the unit from the battery becuase to make sure there isn't a parasitic draw. I could have wired it to the ignition but I don't know I will do that since it is getting warmer. It's durable and works as expected.

Updated Review:Was replaced with a new PWM DC Motor controller. This time, the motor controller is able to keep up easily with the motor and is still working with no problems. For the price, this is a very good manual variable speed controller for your DIY needs! Was happy to be able to try again as I probably received a bad one earlier. New one has been used for over 6 hours. Still working great!Previous Review:Very bad quality. Was running a brushed dc motor. loaded it (motor was rated under 130 watts at 24v. Motor stalled and the pwm controller had a few components spark. The fuse did not blow and the controller no longer works. You get what you pay for I guess.