KINGPRINT DRV8825 Stepper Motor Driver Module with Heat Sink for 3D Printer Rrerap Ramps 1.4 A4988 (Pack of 5pcs)

2 of the 5 units purchased were dysfunctional. 1 just did nothing, while the other got hot and did nothing other than get hot. on the plus side, the other 3 units worked as intended. buy extra I guess.

I would buy again. Great price for what you get

I bought these to replace some other DRV8825s I purchased off of eBay that would miss steps. These work great and are relatively quiet. Im using these on a RAMPS 1.4 board with an Arduino MEGA 2560.

UPDATE 03/21/2019 New Title says it all. Arrived early February and installed in a RAMPS board, set to 0.82MV and all good. Well, all good for about 16 hours of printing anyway. Just pulled them all out and have gone back to the A4988 after the second one failed. It is a pity as they quietened the printing down a lot with the 1/32 Micro-stepping. I am a bit surprised as I am a fan of Kingprint with with several main boards that have proven to be exceptionally reliable, but this latest batch of drivers -- not so much it seems. This is the second batch of DRV8825 I have had from them. The first lot bought in mid 2018 have been excellent and still running reliably. Will order from a different supplier and try again.

These work just fine. Remember to adjust the screw for what you need. If running for a long time keep a fan blowing on them or keep a few spares on hand.

was pleased with this

I installed these in an Anycubic Kossel liner plus delta printer and it has made a big difference in the amount of heat that is generated. I have theses set for about .7 amps and they runs silent and cool, the steppers no longer make the whine and are cool to the touch after a 2 hour print. I replaced the heatsinks with something that was a bit larger and added a fan to the enclosure. No problems with any of them so far.

Worked great. No problems

Got 5 for 15 bucks or so Work like a charm will be ordering more...

I bought these for lab use to test/analyze motion controller behaviors only to discover that these little drivers need much support circuitry before theyll function. These drivers will also drive from their own noise, meaning once stepping has started it might never stop! These might be okay drivers for those who know them well, but if youre a first time user of these like me I say AVOID!