Pretty certain I've blown a couple in the past and just blown another now. The circuit was working, then after changing about (there are three A4988 on the board, I was testing with one A4988) it stopped working, however upon changing to another A4988 it started working again. Honestly I think I blame the capacitors in the PSU and me being too quick on the last change over... and spike (above 35v)
So... circuit is correct and the A4988 Stepper Motor Driver board is not working... Any further insight into what is wrong and if any chance of fixing...
...or any further protections I can take to prevent this (and I do have capacitors across each boards 12v input (usually I use 100uF, but here they are 47uF 35v Electrolytic))
After reading Pololu - Understanding Destructive LC Voltage Spikes should I try a resistor in series on the 12v input?
After looking at the datasheet:
and schematic diagram here:
Would identifying and replacing C1 / C2 (CIN1 / CIN2), fix the board?
This is probably just a thought experiment for me as I've never performed any SMD soldering (reflow), etc... Just mainly wondering if they are fixable if in a pinch?