Common Cathode 12V LED

I have about 16 channels of 12Vdc LED strips with Common Cathode (GND)

And i want to be able to controll them (On/Off/Dim) with Arduino truh a Encoder

Can some one help me wit a board or a circute diagram??


Sure can : GOOGLE 'control 12V LEDS with Arduino'

See what you find there.

Thoes are all Common Anode (Positive)!