Posted by Greg on 18th Mar 2015
How do they get so much power control from such a tiny chip? Dunno - just use it - it's great!
Posted by Les on 5th Nov 2014
I used these (in conjunction with the IC data sheet) plus a carrier PCB made in the workshop sink and I had a 2 axis stepper motor driver board running inside a day. Make certain you set the motor current for smooth operation.
Works in all modes from full step to 32 micro-stepping.
Posted by Mat on 29th Jul 2014
It works, it works well, and it's easy to use.
Good thought put into compatibility and ease of use.
Only one downside: You have to choose between a heatsink on the bottom or the current adjust on the top when you mount it. Best workaround is external current adjust which is well supported.
Suggested redesign solutions:
- mount the current adjust on the other side
- or add heatsinking copper to the PCB going under and out to the sides on the top side.
- use a side-accessible preset pot
- find a potentiometer that can be adjusted from both sides and add a hole through the pcb.
- make it easy for me to solder another preset to the other side instead.
Posted by Unknown on 3rd Apr 2014
well, how can a small package like this pack such a big punch . I am impressed !!
Posted by Thomas Carpenter on 27th Nov 2013
I have bought 30 of these so far over the last few month. They are powerful, reliable and very compact.
I have designed these into a product which I sell as it takes the hassle out of soldering the tiny pitch chip on board.
One minor improvement would be to move the VREF test point further away from the chip - one tiny slip with the multimeter and you short out VREF to VCC - I did that once and the chip went pop as 30V went on to VREF.
Overall though a great and reliable product - I'll certainly be buying more.
This is a breakout board for the DRV8825 microstepping bipolar stepper motor driver. The DRV8825 features adjustable current limiting, overcurrent and overtemperature protection, and six microstep resolutions (down to 1/32-step). It operates from 8.2 – 45 V and can deliver up to approximately 1.5 A per phase without a heat sink or forced air flow (rated for up to 2.2 A per coil with sufficient additional cooling).
All prices are in GBP.