Fixing the Airrouter you blew up with the wrong wall wart

You went and done did it, you killed your Ubiquiti Airrouter, because you grabbed the wrong wall wart and overvoltaged it.  And now it's dead. 

Well, there's a good chance that only the little switching DC-DC 5V to 3,3V downconverter circuit blew up. 
 
I removed the dead DC-DC converter chip and its associated inductor and diode, Did a test run with an external 3.3VDC power supply to see if the Airrouter was in fact repairable (that it still worked with this supply), and then used a linear voltage regulator to create the 3.3VDC the router circuits want. I used a regulator that was spec-ed to have low dropout voltage, as the input to output voltage difference isn't that much. And one that can do one and a quarter amps.  I wanted to keep the input voltage at 5V, so if someone plugs a cell phone charger cable or such into the USB jack, it won't get blown up by excessive voltage.  I mounted the regulator's heat sink atop the ethernet jacks.  I used some sheet aluminum I salvaged from an old video monitor, though I probably made it bigger than it needed to be.  In any event, the Airrouter was back on the air!