Multiple LEDs not working?

Hi there,

Got myself an ELEGOO UNO R3 and no matter what I do, I can't seem to get more than one LED working with the code, the LED connected to pin 13 works and the L and power light are working normally, I've checked the code and the wiring a million times and followed about 10 different tutorials to make sure I'm doing it correctly but I can't see the problem. Only pin 13 works for the LEDs so can anyone help?


That is normally because you have not changed the pin connected to the LED in the code to be an output. Real Arduino's do not set this pin to be an output by default, it looks like your fake Arduino does not do this, just like the real ones used to do many years ago.

Welcome to the forum.

Please read the first post in any forum entitled how to use this forum.,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.

Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom... :slight_smile:

Post your code and wiring, it's one or the other.

or maybe both