The first version of my stepper motor controller could only handle current up to 2A per motor coil. The motors i used can drain up to 4A depending on the voltage given to the motors. The first version of my stepper motor controller thus just burned
Frown
.
I decided to build a more powerful version using MOS-FETs. Those small parts can handle enormous current but need a driver (see also the h-bridge section).
The first version of my stepper motor controller was a build with the standard L29 and L298 schematic. With this design two small stepper motor could be controller. The design was split up into the output stage, which could also directly be used via the STEP/DIR pins, and a controller which could be connected via I2C to control the motors.
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