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leonsk
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I think you need a good heatsink for the mosfet, it can handle up to 30 A, though it gets really hot..
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Why don't you use a IRF640 Power MOSFET like the attachment. This might work. I used a LM3524 PWM once to drive a power resistor at 12 V / 2.5 A
multiplexed led display prob
in Electronics chit chat
Posted
Tell what you need with more details, maybe I could help....