Here is a DIY Digital Light Dimmer that uses 2 push buttons to adjust the brightness output. Full details can be found here.
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“The light level can be adjusted with two push-buttons “Up” and “Down”. Controller in this application is PIC16F84 that drives BUZ11 mosfet. Dimmer is tested with a light bulb 12V/4W and mosftet didn’t get even warm (which was expected since the datasheet says: 50V/30A).”
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The datasheet maximum ratings have little to do with component heating, that will be determined by component package and heatsink (if any) with respect to the circuit design. How much power are you dissipating? Where does the heat go?
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