Appreciate any help
I'm new to electronics and currently a mature student, trying to take it up (just started).
I am bit confused by the microcontroller pins, I have the Uno Rev.3 and bought a 4 pin Superflux Diode to begin with. just to practice ohms law and stuff.
I can power the LED no problem using the 5v and Ground and manually move the ground test the 3 cathode's to change the colour, but I am confused about grounding and flow(I understand conventional and electron flow).
If I following the blink tutorial and connect pin 13 and ground, it lights and blinks (so do all pins output power)?
Also I connected the common anode to the 5v and 3 cathodes to pins 11,12,13 and wrote a bit of code to flick between the colours.
what I can't understand where is it grounded?? with 1 led pin to 5v and the other 3 to the 11 ,12, 13 if they output power?.... the above works but I can understand \ or see why. I know it probably basics apologies.