I have some big, 1.5A, 5-phase stepper motors and I need 10 transistors each to make a stepper driver for them. What kind of transistor do I need for a high-power switching application like this? And hopefully not too expensive.

Good transistors for making stepper motor driver

Using Arduino Motors, Mechanics, Power and CNC

system February 1, 2011, 9:08pm 5

Take a look here: Jones on Stepping Motors. Jones seems to be the defacto stepper authority on the internet. A link to his site should probably be included somewhere in the Arduino site.

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Good transistors for making stepper motor driver

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