I am building an h bridge running a 12v 5amp motor. What are the equations for determining to proper transitor or mosfet to use. Just wanted to know the math behind choosing one vs the other. I have looked at this link http://www.mcmanis.com/chuck/robotics/projects/esc2/FET-power.html but i find it hard to follow. Could someone simplify it for me. I was thinking of using tip147/142. I would like to know how much current they can handle in free air. Thanks
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