Hi there! I want to make a LED project. I have 4 LEDs and want to make my Arduino UNO to light them up: Blue LED lights up Red LED lights up Green LED lights up Yellow LED lights up Blue LED goes off Red LED goes off Green LED goes off Yellow LED goes off and so on ... I tried myself but didn't …

How to make a led-row?

anon57585045 October 28, 2017, 7:12pm 2

Do you have current limiting resistors on the LEDs?

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