At the heart of the Arduino Uno there is the ATMEL ATmega328 microcontroller. Maybe I should take a quick look at the device and its capabilities before diving into more programming. Below is the ATmega328 block diagram. The memory subsystem consists of:

• 32 KB Flash memory (used as program memory)
• 2 KB SRAM (used as data/stack storage)
• 1 KB … Continue Reading ››