Feature:  Pro Mini is based on the ATmega328 (AVR) microcontroller.   Has 14 digital Inputs / Outputs (6 from which can be used as PWM outputs), 8 analog Inputs. Reset button.  Mounting receptacles are included in the package but aren't soldered.  For connection Pro Mini to the computer, it is necessary to use the USB-UART adapter, which you can find on our site. Or for updating of firmware via the ISP interface (the programmer is required).   Unregulated power is applied to RAW, with 4-9V (for 3.3V) and 6-9V (for 5V), and the peak is 12V.   The power supply regulator will reduce it to a logic level. (Please note that the higher the input voltage the higher after current stabilizer.   Operating current up to 350mA.    Specifications:  Power Out: 3.3V/5V-400mA;  Power Consumption: 3.3V/5V 400mA;  Logic Level: 3.3V/5V;  Clock Frequency: 8MHz;  Operating Supply Voltage: 3.3V (this item) /5V (product ID: 1644395);  Digital I/O: 14(6-PWM);  Analog I/O: 8;  Memory Size: 16Kb/32Kb;  Data RAM Type/Size: 2Kb;  Data ROM Type/Size: 1Kb;  Interface Type: ISP;  Operating temperature: −40С°/+85С°;  Length×Width: 33.02×17.78mm;    Package includes:  1 x Pro Mini Board