This page lists my Arduino experiments and projects.

Disclaimer:

• I have near-to-zero experience in electronics hacks (I've always been a programming addict);
• you will find here some things that here worked, but I cannot guarantee they'll work for you (and without damaging anything). I will try to give as much as information possible.

Quick-FAQ:

• what is "Arduino"? See www.arduino.cc or search the net for "Arduino projects" (whoopeee!)
  
  
• what is "PDE" source file? (See here for an example). It's a small C++ program source that you write to control Arduino's GPIO (general-purpose I/O) hardware inputs/outputs.
  
  
• perché diamine non scrivi in italiano? ehi, ehi! nonostante queste pagine siano spesso nel mio inglese maccheronico, ci troverete sempre un po' di commenti in italiano.

Arduino specifications

• processor: AVR ATmega168
• flash memory: 16384 bytes (14336 available)
• EEPROM: 512 bytes
• RAM: 1024 bytes
• ports: SPI, TWI, 20+ GPIO lines, etc

Notes:

• flash memory endurance is some 10000 write/erase cycles;
• EEPROM contents will survive a reboot.

My Arduino experiments:

• simple example (PDE code source and wiring) for reading accelerometer/joystick/keys status from a Nintendo Wii Nunchuck controller;
• simple example (PDE code source and wiring) for Secure Digital data sectors reading/writing.

My Arduino ongoing projects:

• inertial-based path logger.

My Arduino completed projects:

• 20×4 LCD screen with USB interface.

My Arduino hardware:

• I have an Arduino Diecimila board and two Arduino Mini boards.

Quick notes

TWI (2-wire interface) only requires two bidirectional data pins (plus a GND pin and a VCC pin, but these are not "data" pins); as of Atmel ATmega168 datasheet (page 82):

• "analog 5" (PC4): SCL (system clock)
• "analog 6" (PC5): SDA (system data)

SPI (serial port interface) uses 3 output data pins and 1 input data pin when in "master" mode (or 3 input and 1 output when in "slave" mode):

• "13" (PB5): SCK (slave clock input, master clock output)
• "12" (PB4): MISO (master in, slave out)
• "11" (PB3): MOSI (master out, slave in)
• "10" (PB2): SS- (slave select, active low)