Vermes
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This device is used for steering bipolar stepper motors, but it easily can be used for unipolar ones. It's based on L297+L298. It was enriched with optoisolation and some smd elements.
Device parameters:
- current on phase – 2A
- max. supply voltage – 46V
- work modes – half-step
- full optoisolation of steering signals (step, dir, enable)
- max. signal frequency - 10kHz
Link to original thread – Sterownik bipolarnego silnika krokowego