Question about resistor heat
Hello - hoping this is the best place to ask this question.
I'm creating some flood lighting using a 1/2 U channel aluminum with a few high brightness LEDs. Found a calculator and circuit to connect in series with a 12 Volt supply.
My question is not about voltages, resistor values or anything like that. However the resistor is too hot to touch when operating, although prongs, and leds and wires are cool. Just worried that it's a fire hazard.
Tech details:
12 volt supply. LEDs 2.4v @ 30mA, resistor is 150 ohm and connected in SERIES with 3 LEDs. Resistor is rated at 0.25 W so should be well under the 70mA that the calculator suggests.
Question: Is this ok for the resistor. As it's not going to be near anything flammable then I don't see it as much of a risk, but as my project is not the most fire retardant structure, I'd rather crash and burn in a real plane than a home built sim.
Thanks
Paul