"pro mini" not outputing 5V on 12V 1A?

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hello there =),
i have question regarding blue cheap chinese "pro mini" board, unlike black version (baite) have used develop code (3 modes dimmer + photoresistor) have problem - runs fine on 12v have output pwm (or digital) mosfet transistor --> light controled transistor becomes faint (it fades supposed ... faintly).

when power pro mini uno dims lights - 12v 1a no-go apparently cheapie. tried adding 22oohms resistor lower voltage , amps bit - nope still fail.

does have solution this? i'd  really pro mini leech it's power it's host (two power supplies 9w led spot .... messy , overkill)

ps: grounds tied together, , no can't use black 1 anymore ... fried accident lose wire.

what type number mosfet using? 'logic level' device?


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