I'm new to Arduino and new to Electronics and circuit building, and I'm planning as one of my first projects to connect a few, probably three, LEDs to my Arduino, and trigger them to blink at different times. I know how to handle the programming side of things, but I just need some help on how to connect the LEDs.
I'm going to connect each LED to its own output pin, perhaps 10, 11 and 12 for example, and place a 1kΩ resistor between each LEDs anode and its assigned output pin. However, I'm a little confused about where to ground each LED. Is it okay to connect all three of the LED's cathodes to a single wire, going into a single ground pin, or will I have to make use of three ground pins?
Thanks in advance,