![]() Per the data sheet, I replaced the 16mhz clock used on the UNO with an 8mhz oscillator. While the UNO runs at 5v, the 328 chip can also run at 3.3v. My project needed to consume as little power as possible, so a 3.3v switching regulator was used. I begin my design on a breadboard using the through-hole version of the ATMega 328 chip - the same microcontroller used on the Arduino Uno development board. The info below describes the process of developing one of the PCBs I designed during the summer of 2014.
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