The Arduino Mini is a small microcontroller board originally based on the ATmega168 but now supplied with the 328 intended for use on breadboards and when space is at a premium. It has 14 digital input/output pins (of which 6 can be used as PWM outputs) 8 analog inputs and a 16 MHz crystal oscillator. It can be programmed with the Mini USB adapter or other USB or RS232 to TTL serial adapter. Warning: Don't power the Arduino mini with more than 9 volts or plug the power in backwards: you'll probably kill it. Feature: Operating Voltage: 5V Input Voltage: 7~9V Digital I/O Pins: 14 (of which 6 provide PWM output) Analog Input Pins: 8 (of which 4 are broken out onto pins) DC Current per I/O Pin: 40mA Flash Memory: 32KB (of which 2 KB used by bootloader) SRAM: 2KB EEPROM: 1KB Clock Speed: 16MHz