Last night I was in the last stages of testing for a MiniFridge Temperature Control project, when something shorted, either involving the sensor or the connection between 5v+ and ground. The 3v LED indicator on the board turned off, and I quickly disconnected the power supply.
After a lot of probing and testing, I found that the board had burned slightly between the 5v+ and Gnd under the header, and the soot was shorting it out with about 7ohms of resistance between the two. The MAX 1676-EUB also heated up amazingly at this point for about 4 seconds. A quick spotcleaning fixed that, and the board's battery indicator lit up again.
The sketch that was running on the board also kicked back up and started transmitting to the serial terminal, and I believe the sketch can be reloaded properly as well. However, all of the digital pins have lost their ability to write 'High' over about .2~.25 volts.
I've searched a lot and haven't found very relevant information regarding the BT. It'd be nice if it were just the 1767 EUB that were fried.. Are there any points that I can probe to see if the voltage is stable before entering the ATMEGA168, and if so, are there any suppliers that sell preflashed ATMEGA168s in SMD packages? I guess if it really came down to it I could just flash my own.. but that'd be a serious pain. Thank.
edit: The 5v out on the left side still reads 5volts on a multimeter. Digital pins 5 and 2 are stuck on a 4.9v, despite being unused in the sketch. pin 5 is also running with a VERY limited current, 0.087mA, compared to a standard 20mA from the 5v pin to ground. 2 is fine up to 20mA at least. Verified the MAX1767 eub is outputting the right voltage and sufficient current.
I guess this means I'm going to have to replace that tiny smd atmega168.