I've found this tutorial too, but I haven't found such FETs locally, what is a subsitution?
What power supply have you used? How efficient (how hot
) were drivers?
I used the IRF540. My mood light uses 3x3 watt leds and is powered by PC, 5 volt.
The driver of the red led, tuned at 1.2 amps, warms up a little after several minutes full power,
but it's hardly mentionable. Mosfets for blue and green, tuned to 1 amp, don't warm up at all.
The 3 watt resistors I used don't heat up at all.
At 5 volt, single led, it seems pretty efficient, at higher voltages it will be less, but probably efficient enough
to drive a 1 watt led without needing a heatsink for the mosfet.
BTW, My dog strongly disagrees the "Lightning" menu of my mood light is part of an "Hello World" application
Sorry, I haven't understand the joke
She seems to understand thunder&lightning outdoors, but indoors, no way...
Normally she's not afraid fast, but this was true panic.
She's 10 years old, I had never seen her like that.
I deleted the routine and I'm still thinking of replacing it with some sort of thermometer, showing more red when it's hot / blue when it's cold.
Should... you have some carved crystal vases/glasses, they're great in combination with an RGB-Moodlight.