Arduino Uno Question

Projects General Guidance
1

Hello, have a question regarding the Uno and the possibility to have it perform like I need. I am a welder and not an EE, so forgive the elementary type question...

(Project: 10 LED's behind a frosted glass to 'replicate' glowing embers that are flaring up at times)
Using the Uno, would it be possible to power 10 LED lights and have them function as follows:

6 would fade independently from each other ranging from 1/4 brightness to full brightness - using the PWM outputs of 3, 5, 6, 9, 10 and 11

4 LED lights to be on all the time at 1/4 brightness - using outputs of 2, 4, 7 and 8

I understand (somewhat) the PWM functionality in being limited to 6 outputs (fade) but am not sure if I can use the other pins to have the remaining LED lights to be on at a quarter of their peak brightness.

2

The brightness of the LEDs can be controlled by PWM or adjusting the current through them with a resistor. Use a pot as the current limiter and adjust it till you get the brightness that you want and measure the pot resistance. I have seen the "fire effect" around so know its done, but can't remember where. The one I saw used just red and yellow LEDs.

3

If you run out of hardware PWM pins then you can do PWM in software easily enough - or use a MEGA based Arduino that has more hardware PWM capable pins.