Arduino : use a nokia 5110 lcd screen
Arduino : use a SD Card Reader
Arduino : a laser tag and a photo resistor
Arduino : play with a CC1101
Arduino : play with a potentiometer
Arduino : use a transistor
Arduino : use a shift register (74HC595)
Arduino : use a shift register (74HC595) and a transistor array (ULN2803)
Arduino : shift out leds
Arduino : Cascade two 74HC595
Arduino : Cascade two 74HC595 (video)
Arduino : 4 digits 7-led display
Previous recap #1
Arduino : display a clock based on a lcd screen and a RTC
Arduino : output to a tv (tvout)
Arduino : use a PS2 keyboard
Arduino : send and receive data thru radio frequency (RF433)
Arduino : programming an Arduino Pro Mini with an USB TTL Dongle
Arduino : use an ethernet controller (enc28j60)
Arduino : use it as an infrared remote
Arduino : use a Texas CC1101
Arduino : use your internal atmel 328p temperature