Re: Uploading the Software

Posted by Seth on Jul 13, 2017; 12:22pm
URL: http://bluesaab-forum.90.s1.nabble.com/Uploading-the-Software-tp235p1129.html

Thanks, HomerIsBack, that's some great information.

NeilR, that's one of the first things I do when I build a new module; I assemble the power section FIRST, and just do a test to make sure I'm getting 3.3v on the vcc pins. If that's not right, and I installed a bunch of parts, they all might get fried if the vcc isn't working right.

It definitely sounds like you have a short somewhere, which is why the vreg is so hot; it's an 800mA regulator and it's trying to push all 800mA (or more!). Normally, the module only draws 50-100mA when it's working right :)

There are several caps between vcc and gnd for power filtering; I would check those (check the polarity of the caps; newer boards went to ceramic so there is no polarity, but older boards had electrolytic, which are definitely polarized).