WWZMDiB3 Pcs A4988 Stepper Motor Driver Compatible with for Arduino 3D Printer CNC Engraving Machine

Works like a charm

No. Just no. No luck with these the first 2 I tried were bad which wasted hours of debugging. Spend the extra money and go with a better brand.

Work well.

Installed one of these in my Bachin Chinese laser engraver. Although the old chip was not a fault, this one was a direct replacement and I have left it in. I bought these because of near-unanimous positive feedback. They are a great product, and I will buy again should the need arise.

Works great for playing around with stepper motors. They do get pretty hot and the kit includes metal heatsinks and double-sided tape. You could also use a single device to control a couple of DC motors.

Opened one and noticed the pins were bent. Took the other x2 out of the box and they were also bent (one less than the others). Basically all x3 units came right out of the box with the pins bent outwards. x2 are unusable, one is questionably usable. Can't plug the x2 most bent ones into a socket and the I risk damaging the PCB by forcing them straight.Due to this, I have no idea if they work, as I cannot put them into the fixture. Quality control needs to add this to the list of checks.I'm not even messing with the least bent one, I am returning the kit for a refund.

Plugs right in the the Arduino board and works

Of the three I got, the first one I tried didn't trigger the Nema17 I use for testing -at all-. I swapped it out for a second one and the tests ran fine. When it started acting up days later I swapped it out for the third and found that I had to twiddle the timing of the high and low triggers to the step pin because the timing that worked on #2 didn't work on #3 and it kept locking up the motor. These things are cheaply, but maybe they're made TOO cheaply. Will gladly pay more for reliable, dependable quality.