Arduino Uno Rev3 Development Board

You've got a half-finished project on the bench and you need a board that just works. The Arduino Uno Rev3 is the one everyone reaches for first — and for good reason. ATmega328P chip, 14 digital I/O pins (6 of them PWM), 6 analog inputs, running at 16MHz. Plug in a USB cable to your laptop or pop in a power adapter and you're coding. Messed up a pin? Pop the chip out, grab a replacement for a few dollars, and start over. No drama

• ATmega328P microcontroller with 16MHz ceramic resonator
• 14 digital I/O pins (6 PWM-capable) and 6 analog inputs
• USB connection for programming and power — or use an AC-to-DC adapter / battery
• ICSP header, reset button, and on-board power regulation included
• Forgiving design — replaceable chip means mistakes are cheap to fix