Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Does this PWM the negative or positive motor lead?
Document: this is a great PWM. Did a test on an oscilloscope and can confirm that it does range from 10% to 100%.
Works great. I used this as a motor control on a small 12 volt lathe. Easy to connect. Functions perfectly.
I'm only a hobbyist and needed something to control a small 12v motor for a project. Hookups are simple to understand.This works perfectly.
I'm running a 12V motor for a stir rod. Based on the spec ratings this, device is way over kill, but for the price I could not resist.
I needed to make things rotate on a parade float. Using this controller with a window motor (190 RPM 12VDC Right Angle Drive Automotive Window Motor) allowed me to spin a decorative disc at exactly the speed desired by the &#34;creative director&#34;.
Works great for controlling my diy stir plate, using a 12v laptop charger and automotive oil cooler fan motor. The first one corroded and broke after 6 months of use in a damp fridge. I sprayed the new one with lithium grease to prevent corrosion. It might make a constant high pitched sound, but I'm not sure if this is the controller or the motor I'm using.
I purchased this item from other sources and i plan on ordering several more over time. I wish I knew about this years ago, it would have helped in many projects. I animate Halloween characters and finding the correct power supply has always been a challenge. This is the &#34;correct&#34; way to control the speed of a DC motor. Connect this to a windshield wiper motor and you get a perfectly variable speed and more power than using a 5v power supply.
worked very well Directions were easy to follow and part is working great  Will by again it needed Thank you
love this but it has a .5v output at lowest setting.Otherwise id give 5 stars.You must install an on off switch.Otherwise it has a smooth and flawless operation.
Works as advertised up to 24 volts - it is easy to mount too! Does not get terribly hot either.
Answer: There are two motor terminals and two power supply terminals.  Your motor should have two wires; connect them to the motor terminals.  Reversing the motor wires reverses the rotation direction.  Do not connect the motor's ground to the power supply ground.I used this PWM on a parade float, where I controlled the speed of an automotive window motor as it spun styofoam "gears" for visual effect.  Since the gears were large, I had to run the motor near the minimum PWM setting.  There were six window motors total, each with its own PWM.  I ran 12vdc plus and minus in a parallel loop around the float, with a master switch to turn on the entire circuit.  The float won the parade's award for best animation.