Raghunathan R wrote:
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And for stepper applications whatever the final drive stage, dont forget to use freewheel diodes of the FAST RECOVERY TYPE. A common IN4007 wouldnt do the job.


True Raghu, but when you use fast diodes the damned circuit rings like a bell - and you have emission problems and overheating again. These circuits are fast and noisy, and need decent snubbers too.

Steve