Smoothieboard v1.1 coming in a few weeks.
http://gerblook.org/pcb/Yh2czpp7JQGb34f7sfp4bg#front
TL;DR : We are getting 1/32 allegro drivers, and diode protections for small mosfets running fans.
Changelog :
Smoothieboard v1.1 (2016/10)
- upgraded stepper drivers to A5984 drivers with 32x microstepping
- added a solder jumper (JP36) for MS3 on new A5984 drivers
- changed the current limiting resistors (R78,R65-R68,R84-R85) for VBB powered LEDs to 8.2K
- added an electrolytic capacitor (C84) to the 5V power system
- moved the electrolytic capicitor (C63) for the 5x mosfet set and increased its footprint size
- added flyback diodes (D7-D9) to small mosfet outputs to protect from inductive loads like small fans
Looks awesome. I might want to wait until 2.0 to upgrade, though 
You mention flyback diodes, which I assume 1.0 doesn’t have. If I wanted to add those myself, should they be placed close to the mosfet, like inserted into the connector together with the wires, or should I solder them as close to the fan as possible? Or does it matter at all?
@Jesper_Krog_Poulsen There are pins right next to each mosfet connector to add those, see http://smoothieware.org/3d-printer-guide#toc21
Ah, didn’t know that. Thanks
Perhaps a bit late to make a change but I noticed the thermal pads for the M1-M4 stepper drivers have thermal reliefs but M5 does not. Was the intentional or an oversight? Won’t this have a negative impact on the heat dissipation capabilities of the M1-M4 drivers since it essentially insulates heat conduction to the large upper foil?
They all have very good heatsinking, this has been very well tested.
@Arthur_Wolf Understood, I just wanted to bring the inconstancy to your attention since it seems odd to not have a uniform thermal design for all 5 drivers. So it looked like an “oops” to me that might have been overlooked.
missing/deleted image from Google+