Monday, July 30, 2012

Why I hate hardware

Soldered the Ardweeny together, and the backpack, and the FTDI-to-USB connector as well. Couldn't even get the blink sketch to work. Wasn't real sure if it was the hardware, the computer settings, or something in the software settings. What I did know was that the blinky light, she no blinky, which it should when you press the reset button. A missing boot loader would cause this (no real way to test), or a bad power circuit (didn't appear to be bad as far as I could tell with a volt meter), or a bad reset button.

So I'm sending this mile long email off to tech support and testing the switch with an ohm meter, and out of blue, it starts working. Come to find out, there was a bad (or missing) solder connection on one (or more) lead to the resonator (basically a 16 mHz clock).  I would have to unsolder all 28 pins from the PCB to the ATmega328 to separate them and get to the underside of the board. After struggling to get just one pin off, I decided to solder the resonator from the top instead :-)  Works like a champ now.

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