RioRandSmall PWM DC Motor Speed Controller - for 6V 12V 24V 28V 3A 80W Low-Voltage Gear Motors with Forward/Reverse Switch Control

I received this PWM controller with a reverse switch - and installed it on the bath fan in my RV, to replace the defective switch and motor controller that used 10W resisters to control motor speed. The PWM controller, unlike the resistors, does not waste power by simply using resistance (which bleeds off power as heat), but rather uses pulsed current to control the DC motor. It did take a bit of finesse to cut out the rectangular hole for the forward/off/reverse switch, but once done, the switch snapped into position perfectly. The variable speed control also has an off position so you can simply rotate the switch to off if you prefer. Motor speed is smoothly controlled, allowing me to turn down the fan a bit to reduce noise and conserve energy. I will likely purchase another one to control the speed of the range hood fan.Great product, and it saved me a ton of money vs. replacing the entire fan unit or the original (resister) speed control (which is currently unavailable). Well built, good solder joints on the circuit board, seems sturdy, easy connections.

Works perfect thank you 👍

Work perfect.

The first one they sent did not have the reversible switch included with it. So I contacted them and they sent me another one of the same. No reversible switch. So I sent the second one back and was refunded purchase price. But I still had the first one and I started using it because I needed to use that fan. It lasted about a week and now it doesn't turn off or adjust the speed. So as far as I'm concerned, these are junk. And whoever was in charge of shipping my orders, should be fired. They screwed up two times on the same order.

I did not follow the wiring diagram (image 6) and connected the power to the terminals marked as IN on the PCB. Connected the motor to the OUT terminals and it did not work well. Thee speed control had a very control range and the reverse switch did not work. Then I checked the wiring diagram and noticed the the IN and OUT terminal are reversed. Hooked up the power to the OUT terminal and the motor to the IN terminal and then the controller worked perfectly. It has a full speed range from zero to max and the reverse switch worked as well.

So small ! And as described on YouTube and Thunder Messa Studio , the same as my big DC Tech II throttle. The engines also run smoother.

I used this to control a motor mod for a filament winder. It was easy to hook up. everything was clearly labeled. once connected, it worked well, allowing me to control the speed of the motor.

Perfect for the project I bought this for. Nice to have it reversable