i have a arduino mega2560 and a instalation on my aquarium 8 leds (10watts 1 amp each one)
I have connected two LEDs for each TIP120 and one resistor 1k for each one
the electric current is not constant when i try to dimmer my leds,the light is unstable
the resistor is a good idea for my tip120 o i need change to 2.2k resistor?
the time try to control my leds is one hour 0 to 255 .
or i need do a bridge diode retifier to control the variable current?
thanks