DZS Elec 10A 12V-40V DC Motor Speed Controller 12V 24V PWM Variable Speed Regulator Governor Switch CCMHCN With Speed Control Knob

Used this to replace a bad wire feed motor driver board on a Harbor Freight Mig170 welder. I secured the old board out of the way with wire ties as it has other circuitry on it that still works. I installed this board using the potentiometer nut in the original hole. I installed a 24vdc power supply (240vac rated) to the pains terminals and wired the output in series with the trigger wire. It fed wire perfectly and brought the welder back to operation. I did add some hot glue to support the board and prevent it from touching anything. It is nice that it has a heat sink to keep it cool as the original one did not. Great little board and appears to be well built.

Too early to tell about long term reliability, but this worked great for me. I'm using it to control an 18V drill motor. My power supply is a 20V laptop power supply, and this is giving me an output of about 4 to 18.5V, with maximum amps at about .5A. Can't say if that ~7% voltage loss is reasonable, but it is not a problem for me. The speed control is very linear. Not getting any heat anywhere in the setup.

These work really well, my only complaint is that the knob needs to be run through a panel as the only thing keeping it attached is solder. otherwise electrically pretty durable, i’ve accidentally shorted one a bunch of times and it still works with no issues. great price

UPDATE: The voltage drop at 100% output was not suitable for my application. Will keep it in my box of controls for another project. Intended use: control a 12v RV water pump to minimize pressure surging... Initial testing with just the module and the pump shows that the pump speed is controlled from stand still to close to full speed with the pot. Voltage measurements have the input voltage @ 12.55v and the module output at 11.15v at max output. Will have to wait for further testing to determine if the drop across the controller will be significant. I will update this review when it is plumbed in with pressure transducer & some additional electronics.

Works fine. Heat sync is a little fragile. Used it on a wiper motor for a Halloween prop.

Tested this when I first received it and it appeared to work ok. Using to control small DC motors, less than 3 amps on 9 volts. Unit failed the 3rd time I applied power to it. Fuse did not blow, the pot has lost the ability to control the output voltage. Output jumps to 9 volts after turning the pot about 5 degrees... and then actually drops as the pot is turned to the maximum (but only to about 8.5 volts). Components "appear" to be quality but their markings have been removed so I can't replace anything. Not out much $ but buyer beware...

I like to play with projects, and I created a leaf blower out of an old vacuum motor. This controller helps me soften the enormous speed of the vacuum motor. Works great, wide range, recommended.

This is a great dc-dc controller, 12-24volt 10amp max. It worked great for my Halloween props controlling windshield wiper motors.. 👍

As expected

Didn't handle the high amp