Can't get LED to work

Projects General Guidance
1

I have an arduino micro which I have used previously without issues, but now I can't get an external LED to blink with it.

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I've used the blink example and switched out the built in led to pin 9 instead.

Pin 9 goes to a resistor of 220 ohms (according to the label that was connected to it), the resistor is connected to the long pin of the LED, and the short pin of the LED goes to the gnd pin of the board.

I tried with another led to no avail. The normal blink example with the built in LED does work.

Any ideas?

2

Look the new image
Each collun has all 5 pins jumper together.

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try this way

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3

Yes, rookie mistake...

that solved it thanks!

4

Along with soldering female headers to the micro... that means you can't plug it into the breadboard as the designer intended.

5

Please do not post in "Uncategorized"; see the sticky topics in https://forum.arduino.cc/c/using-arduino/uncategorized/184.

Your topic has been moved.

6

Totally missed that.

7

You can insert male headers atop the female headers, then insert the micro into the breadboard upside down. Every rookie mistake has a rookie solution.

Youtube has a few PCB repair channels that show how to de-solder headers. One (ugly but easy) solution is to cut the plastic between the header pins and de-solder each pin individually. A clean way is to solder a thick copper wire to the pins then transfer the heat to all pins simultaneously, but the risk of overheating is real.

8

Can't press the reset button... but you could attach an external reset button on the breadboard.

Not ugly, quite a clean way to do it. :+1:t2:

You need a tabletop vice to hold the board firmly while you apply the iron on one side and pull the pins out with fine pliers from the other side.