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Just looking at the datasheet for that transistor. Its an npn darlington not an igbt or fet. I would imagine (not sure) that it would require a different driver stage. Also it looks to be quite a slow device in terms of switching ability. What frequency are you using on the arduino? The revolt default is 16khz which i would say is too high for those parts.
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Now, Cole, when you shift the gear and that little needle on the ammeter goes into the red and reads 2000 Amps, that's bad.
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