Songhe 3D Printer Parts DRV8825 Stepper Motor Driver Module with Heat Sink for Ramps 1.4 StepStick A4988 (5pcs)

They drive by stepper Motors. They do it very well.

Exactly what I was looking for, cheap boards but the ones I received were reliable. Using them to play with some NEMA 17s

They work well enough. Just be aware that every DRV8825 ever made has a slight hiccup. It is not noticeable in most cases. If used in a 3D printers extruder, however, they will create zebra stripes in the walls of your prints. As long as your application does not require extremely smooth movement, they will work fine.

4 out of 5 were great. #5 emitted magic smoke and burned within 5 minutes. Oh well, they are cheap as chips so I dont expect much. I should have known something was wrong when I noticed how difficult it was to set the vref.

In the past I purchased many of these cheap stepper motor controllers from a variety of sellers and gotten ripped up by receiving broken or cheap-quality modules that fall apart after integrating. With this seller, all of the pieces are I received were in excellent condition and the potentiometers on each piece were intact and resilient to adjustment. I am driving nema 17s at 2A 24v power supply I have had no issues and the product has functioned incredibly well for its price.

i checked all boards to make sure they worked and all 5 worked at the start. I accidentally fried one when i forgot to remove the motor wires while adjusting the pot, thats on me. but then one by one, after several power cycles the driver would refuse to turn my motor. when powered on the motor would twitch, but not rotate. 3 boards did this and im on my last one now. maybe i shorted something somehow when testing out each microstep mode, maybe its just a bad board. they do work but be weary they may randomly go bad on you!

Arrived on time and as described.

Opened package and found them all individually wrapped in anti-static bags. Opened two and tested one dead on arrival even after adjusting potentiometer and trying on different driver ports. Opened a third one and it works fine, still have two untested but one dead on arrival. Will reach out to seller and see if they can send me another one. Will update once I get an update.

Those are the real deal and work well. Packaging is a bit confusing since mine said A4988 on the bag, but the components were DRV8825s. The calibration screw is pretty sensitive and it can be hard to hit the current limit for 0.4A motors