Depends on what the LEDs are being used for. Without that information. I’m leaning towards the shift register solution. One clock pin and one data pin may be all that is required. Depending on the particular shift register, you may need a latch pin.For common cathode: https://forum.43oh.com/topic/1718-controlling-4-rgb-leds-with-minimal-components/?page=2
I think the bigger problem will be to have them all on at the same time. Rapid on/off cycles could give that appearance. My comment was not meant so much as a solution but to round out djsfantasi's list, and most important, to give the TS some background reading. If the TS is pin limited, then he/she may want to consider other solutions or redefine the criteria.
I understand that. The WS2812 is an RGB LED that contains a chip to control it on the same die.I am talking about 5 RGB Leds .
1 RGB means - 1 Red , 1 - Green , 1 - blue
So total 15 Leds
And 5 Leds can be turned ON at a time.
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