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Arduino Mini 05 - ATmega328 DIP Module US$16.97

Arduino Mini 05 - ATmega328 DIP Module

The Arduino Mini 05 is a small DIP module with an ATmega328, intended for use on breadboards and when space is at a premium. This version of the board comes with male header pins mounted on the bottom side of the board. This ATmega328 board has 14 digital input/output pins (of which six can be used as PWM outputs), eight analog inputs, and a 16 MHz crystal oscillator.

The ATmega is pre-programmed with the Arduino bootloader that allows you to upload code to the ATmega328 via serial UART using the open-source Arduino development environment. It can be programmed with an optional USB-to-serial TTL adapter adapter cable (see add-on options below). If connected to USB via the optional cable, the board can be powered from the USB bus.

Warning: Don't power the Arduino mini with more than 9V, or plug the power in backwards; you'll probably kill it.


Microcontroller ATmega328
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 available via solder pads)
DC Current per I/O Pin 40 mA
Flash Memory 32 KB (of which 2 KB is used by bootloader)
Clock Speed 16 MHz

The board measures 30 18 mm, and has a reset button on the top side.

Input and Output

Each of the 14 digital pins on the Mini can be used as an input or output. They operate at 5V. Each pin can provide or receive a maximum of 40mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. Pins 3, 5, 6, 9, 10, and 11 can provide PWM output; for details see the analogWrite() function. If anything besides the Mini USB (or other) adapter is connected to pins 0 and 1, it will interfere with the USB communication, preventing new code from being uploaded or other communication with the computer.

The Mini has eight analog inputs, each of which provides 10 bits of resolution (i.e. 1024 different values). Inputs 0 to 3 are broken out onto pins; inputs 4 to 7 require soldering into the provided holes. By default the analog inputs measure from ground to 5V, though is it possible to change the upper end of their range using the AREF pin and some low-level code.

See also the mapping between Arduino pins and ATmega328 ports.


Note: the pinout changed from version 03 to version 04 of the Mini; please be sure you use the right diagram.

Pinout of the Arduino Mini 04/05. (Note that the ground pin on the left has moved down one pin.)

About Arduino

Arduino is an open-source platform based on boards featuring an Atmel AVR microcontroller with a pre-programmed bootloader and a development environment that implements the Processing/ Wiring language. Arduino can be used to develop stand-alone interactive objects or can be connected to software on your computer (e.g. Flash, Processing, MaxMSP). The open-source IDE can be downloaded for free (currently for Mac OS X, Windows, and Linux).

Arduino References

Arduino Mini Downloads

Arduino Mini 05 Schematic
Arduino Mini 05 Design Files for Eagle

Optional Recommended Products for this Item
USB-to-Serial Cable: 5V TTL, 6 Bare Wires+ US$16.50
Rectangular Pin Header, Male, 1x40 Single Row, 2.54mm Spacing+ US$0.75

This product was added to our catalog on Wednesday 24 June, 2009.


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