Sketch won't run on Arduino board

Projects General Guidance
1

I have a short test set of leds I use to try out different sketches, but after uploading a sketch it doesn't run.

I have just powered on the breadboard and the leds light up , then I power up the arduino, and nothing changes. I have checked my connections etc, with no luck.
The Arduino powers up and the green led as does a yellow led light up.

I have looked at the loopback test, and after starting the serial monitor, I'm not sure how to do this:

  1. Connect the terminal application to the serial port for your board.

What is the serial port for the board.

2

The serial port for the board is the one that appears in the tools -> port menu when you connect the board - the same one you use to upload your code. The name/number of the port will depend on your system and what usb port you plugged it into.

3

If the upload was successful then you don't need to run the loopback test. That test is only needed if the upload fails.

After you upload, do you see "Done uploading" written on the teal notification bar in the Arduino IDE?

4

Show your sketch (and use code tags).
Show your schematic.

"It doesn't run" does not give us any useful information, especially not without the above information. It more than likely "does run" but does not do what you expect.

5

Which system do you have on your PC?

6

This thread can be removed now as I had a fault with components and wires. Now I have replaced the mosfets the led strip now does change accrding to the sketch.

Thanks