I'm a beginner when it comes to electronics.
I just retired & I'd like to take up electronics as a hobby.
I want to build an LED fader. I've seen faders on YouTube using triangle waves. Most of the LED faders that I've seen on YouTube use PWM.
So, I've got some questions. Remember that I'm a newbie.
If a triangle wave is graphed on an XY axis, X would be time but what would Y be? Why is the LED brightening & fading when a triangle wave is applied? Is the voltage changing or is the current changing?
Why do most of the videos on YouTube use PWM to change the brightness of the LED instead of triangle waves?
Basically, which would be better to change the brightness of an LED - triangle wave or PWM & why?
I just retired & I'd like to take up electronics as a hobby.
I want to build an LED fader. I've seen faders on YouTube using triangle waves. Most of the LED faders that I've seen on YouTube use PWM.
So, I've got some questions. Remember that I'm a newbie.
If a triangle wave is graphed on an XY axis, X would be time but what would Y be? Why is the LED brightening & fading when a triangle wave is applied? Is the voltage changing or is the current changing?
Why do most of the videos on YouTube use PWM to change the brightness of the LED instead of triangle waves?
Basically, which would be better to change the brightness of an LED - triangle wave or PWM & why?