[Ver1.0] Mono dimmer

Still needs some improvement, such as:

Fuse is placed right after diode bridge.

Zero crossing detected.

Test point voltage at input and gate control.

Thermal feedback at heatsink.

Zener 1N4742A = 12V, 33 = 5.1V.

Relay enable for input power supply and check mode initially.

Cannot use for motor, only use resistor load such as bulb and resistor coil.

Fan enhancing for heatsink.

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