Re: First time assembly - no led activity, any ideas what I've done wrong?

Posted by Karlis on Aug 04, 2016; 7:06pm
URL: http://bluesaab-forum.90.s1.nabble.com/First-time-assembly-no-led-activity-any-ideas-what-I-ve-done-wrong-tp598p599.html

Hi,

First things first - don't worry; we've all been there. :) I myself destroyed like three or four modules before getting a good grip on soldering.

I would start with checking if there's power coming in at all. There are a couple of places on PCB marked 3.3 and GND where you should be able to check the power. Then there's the orientation of LEDs. They are polarized. If you look closer, on one of the sides of an LED (red ones), there are two green markings. Those should go to the side of resistors. The blue LED has a green "|-" marking on the bottom. I consider it as an "arrow ->". That also should be pointed towards the resistor side.

Hope this helps. Good luck!