Teyleten Robot DC 5V-36V 15A Max 30A 400W Dual High-Power MOSFET Trigger Switch Drive Module 0-20KHz PWM Adjustment Electronic Switch Control Board DC Motor Speed Controller for Arduino 10pcs

I used one of these to control the brightness of a 12V red LED light strip (SMD 5054 LEDs) using a PWM signal from an Arduino Mega. [The user would set the desired light intensity on a touchscreen (3.5" LCD Screen Module for MEGA 2560), and a light sensor (TSL2591) would measure the light level and the Arduino adjusted its PWM output to match the desired brightness.] It worked great.

Note that this is a "Low Side" switch. This means the switch controls the -Vin side. Thus if you are trying to use this in an application where the load is "grounded", it will not work. You must use this with loads that have their low side (- VDC) isolated. Other than that, it works well. It will trigger reliably at a trigger voltage as low as 3.2 VDC although the "on" resistance is a bit higher at lower trigger voltages. If you allow the trigger to linger between 0 VDC and about 3.0 VDC, you will rapidly destroy the switch. It needs a fast rise and fall time trigger signal. With a 3.3 VDC trigger, Vin of 12 VDC and a load of 60 W (5 A at 12 VDC), I measured a loss of 0.4 W in the switch.

These boards are pretty small, and I would prefer to have mounting holes on all four corners of the board plus bigger wire terminals. But they do seem to be working well for powering my three 24v 5015 fans (in parallel) from my Orange Pi 3 GPIO. For the price, I'd definitely recommend them. Keep in mind that these are meant for low current. Don't try to power a bed heater through them. I'd probably say 100 watts or less. I don't think I'd trust the 400w rating at all simply due to the small size of the board and its tiny circuit paths.

As one other person mentioned, this is a low side switch (Vin+ and Vout+ are connected while Vin- and Vout- are the 2 that are controlled by the PWM signal). Also similarly to another review, the rated current on this switch is a scam. Connecting to a DC motor powered by a 3s lipo they burn one after another. I wouldn't recommend if you are actually going to run a motor off of these. (Honestly wouldnt even recommend for a 2s lipo)

Purchased these units for a couple of upcoming projects. All passed bench test with flying colors. Found the effective operational frequency response was around 60 khz. Much higher than the rated 20 khz. All units met or surpassed ratings. Next test will be some long-term power testing. Will buy again if needed.

Worked as expected! I love how compact they are, they fit nicely in my electronics enclosures for all of my 3D Printers. I'm using them to control LED light bars with PWM via Marlin's Case Light menu, absolutely no issues!

I used a pair of these for PWM control of 24V fans in a 3D printer using the Raspberry Pi GPIO ports. They work well for this. Note that MOSFET control is on the low (negative) side of the fan or light connection.

I was excited to find a cheap - large pack of simple speed controllers that can handle 15A rather than me ripping out the pot on other controllers. Whelp - my excitement was misplaced. Burned the first one I tested at 2.5A of current after only about 2 mins - the thing smelled hot after 15 seconds. Not to mention, the terminals are tiny - couldnt possibly accept any wire that would carry 10A safely anyways. Do yourself a favor - unless you want to run these at 1/10th of their "rating" - dont buy them.