Main.ArduinoBoardNano History

Hide minor edits - Show changes to output

November 20, 2013, at 08:59 PM by Scott Fitzgerald -
Changed lines 63-64 from:
The Nano has 8 analog inputs, each of which provide 10 bits of resolution (i.e. 1024 different values). By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the [[Reference/AnalogReference | analogReference()]] function. Additionally, some pins have specialized functionality:
to:
The Nano has 8 analog inputs, each of which provide 10 bits of resolution (i.e. 1024 different values). By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the [[Reference/AnalogReference | analogReference()]] function. Analog pins 6 and 7 cannot be used as digital pins. Additionally, some pins have specialized functionality:
November 20, 2013, at 08:54 PM by Scott Fitzgerald -
Changed lines 13-16 from:
The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.0) or ATmega168 (Arduino Nano 2.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one. The Nano was designed and is being produced by Gravitech.

||Attach:NanoFront.jpg ||Attach:NanoBack.jpg
to:
The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x) or ATmega168 (Arduino Nano 2.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one. The Nano was designed and is being produced by Gravitech.

November 20, 2013, at 08:51 PM by Scott Fitzgerald -
Changed line 3 from:
||Attach:ArduinoNanoTop.jpg ||Attach:ArduinoNanoBottom.jpg
to:
||[[Attach:ArduinoNanoFront_3_lg.jpg | Attach:ArduinoNanoFront_3_sm.jpg ]] ||[[Attach:ArduinoNanoBack_3_lg.jpg | Attach:ArduinoNanoBack_3_sm.jpg ]]
November 23, 2012, at 05:17 PM by Roberto Guido - added comments box on bottom
Added lines 97-98:

(:div id='commentsbox':)
October 03, 2011, at 03:14 PM by Federico -
Changed lines 7-8 from:
(:cell:) [[http://store.arduino.cc/eu/index.php?main_page=product_info&cPath=11&products_id=77 | Attach:buttonStore.jpg]]
(:cell:)[[http://arduino.cc/en/Main/Buy | Attach:buttonDistributors.jpg]]
to:
(:cell:) [[http://store.arduino.cc/eu/index.php?main_page=product_info&cPath=11&products_id=77 | Attach:buttonStore.jpg ]]
(:cell:)[[http://arduino.cc/en/Main/Buy | Attach:buttonDistributors.jpg ]]
September 17, 2011, at 02:02 PM by Scott Fitzgerald - mirror dev
Changed lines 4-10 from:
to:
||''Arduino Nano Front'' ||''Arduino Nano Rear''

(:table border = 0 :)
(:cell:) [[http://store.arduino.cc/eu/index.php?main_page=product_info&cPath=11&products_id=77 | Attach:buttonStore.jpg]]
(:cell:)[[http://arduino.cc/en/Main/Buy | Attach:buttonDistributors.jpg]]
(:tableend:)
Deleted line 96:
August 15, 2009, at 04:14 PM by David A. Mellis -
Added lines 9-10:
||Attach:NanoFront.jpg ||Attach:NanoBack.jpg
Deleted lines 12-13:
||Attach:NanoFront.jpg ||Attach:NanoBack.jpg
August 15, 2009, at 04:13 PM by David A. Mellis -
Added lines 11-12:
||Attach:NanoFront.jpg ||Attach:NanoBack.jpg
August 15, 2009, at 03:43 PM by David A. Mellis - Described the Nano 3.0 (ATmega328)
Changed lines 7-12 from:
Arduino Nano is a surface mount breadboard embedded version with integrated USB. It is a smallest, complete, and breadboard friendly. The Nano was designed and is being produced by Gravitech.

It has everything that Diecimila has (electrically) with more analog input pins and onboard +5V AREF jumper. Physically, it is missing power jack and power select jumper. Since the Nano is automatically sense and switch to the higher potential source of power, there is no need for the power select jumper.

Nano�s got the breadboard-ability of the Boarduino and the Mini+USB with smaller footprint than either, so users have more breadboard space. It�s got a pin layout that works well with the Mini or the Basic Stamp (TX, RX, ATN, GND on one top, power and ground on the other). It�s a four-layer board with power and ground planes to help provide ICs with sufficient charge during switching and reduce noise (EMC) on high speed switching I/O pins. Ground plane help reduce radiation (EMI). Power plane is low in inductance; therefore any transients that may develop on the power line will be at lower levels.
to:
The Arduino Nano is a small, complete, and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.0) or ATmega168 (Arduino Nano 2.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a Mini-B USB cable instead of a standard one. The Nano was designed and is being produced by Gravitech.
Changed lines 11-13 from:
[[Attach:ArduinoNanoManual23.pdf | Arduino Nano Manual]] (pdf)\\
[[http://gravitech.us/Arduino/Arduino_Nano_V2_3_Eagle.zip | Eagle files]] ''note: since the free version of Eagle does not handle more than 2 layers,and the Nano is currently 4-layer board, Gravitech publishes it here as unrouted, so users can at least open it and use it in the free version of Eagle''
to:
''Arduino Nano 3.0'' (ATmega328): [[Attach:ArduinoNano30Schematic.pdf | schematic]], [[Attach:ArduinoNano30Eagle.zip | Eagle files]].

''Arduino Nano 2.3'' (ATmega168): [[Attach:ArduinoNanoManual23.pdf | manual]] (pdf), [[http://gravitech.us/Arduino/Arduino_Nano_V2_3_Eagle.zip | Eagle files]]. ''Note:'' since the free version of Eagle does not handle more than 2 layers, and this version of the Nano is 4 layers, it is published here unrouted, so users can open and use it in the free version of Eagle.
Changed line 18 from:
||Microcontroller ||Atmel ATmega168 ||
to:
||Microcontroller ||Atmel ATmega168 or ATmega328 ||
Changed lines 25-27 from:
||Flash Memory ||16 KB (of which 2KB used by bootloader) ||
||SRAM ||1 KB ||
||EEPROM ||512 bytes ||
to:
||Flash Memory ||16 KB (ATmega168) or 32 KB (ATmega328) of which 2 KB used by bootloader ||
||SRAM ||1 KB (ATmega168) or 2 KB (ATmega328) ||
||EEPROM ||512 bytes (ATmega168) or 1 KB (ATmega328) ||
Changed lines 29-44 from:
||Dimensions ||0.73� x 1.70� ||


!!!Features:

* Automatic reset during program download
* Power OK blue LED on the bottom
* Green (TX), red (RX) and orange (L) LED
* +5V to AREF jumper
* Auto sensing/switching power input
* Small mini-B USB for programming and serial monitor
* ICSP header for direct program download
* Power OK blue LED on the bottom
* Standard 0.1� spacing DIP (breadboard friendly)
* Manual reset switch
to:
||Dimensions ||0.73" x 1.70" ||

Changed lines 34-35 from:
The Arduino Nano can be powered via the mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.
to:
The Arduino Nano can be powered via the Mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.
Changed lines 40-41 from:
The ATmega168 on the Nano has 16 KB of flash memory for storing code (of which 2 KB is used for the bootloader). It has 1 KB of SRAM and 512 bytes of EEPROM (which can be read and written with the [[http://www.arduino.cc/en/Reference/EEPROM | EEPROM library]]).
to:
The ATmega168 has 16 KB of flash memory for storing code (of which 2 KB is used for the bootloader); the ATmega328 has 32 KB, (also with 2 KB used for the bootloader). The ATmega168 has 1 KB of SRAM and 512 bytes of EEPROM (which can be read and written with the [[http://www.arduino.cc/en/Reference/EEPROM | EEPROM library]]); the ATmega328 has 2 KB of SRAM and 1 KB of EEPROM.
Added lines 68-75:
!!!Communication

The Arduino Nano has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers. The ATmega168 and ATmega328 provide UART TTL (5V) serial communication, which is available on digital pins 0 (RX) and 1 (TX). An FTDI FT232RL on the board channels this serial communication over USB and the [[http://www.ftdichip.com/Drivers/VCP.htm | FTDI drivers]] (included with the Arduino software) provide a virtual com port to software on the computer. The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the Arduino board. The RX and TX LEDs on the board will flash when data is being transmitted via the FTDI chip and USB connection to the computer (but not for serial communication on pins 0 and 1).

A [[http://www.arduino.cc/en/Reference/SoftwareSerial | SoftwareSerial library]] allows for serial communication on any of the Nano's digital pins.

The ATmega168 and ATmega328 also support I2C (TWI) and SPI communication. The Arduino software includes a Wire library to simplify use of the I2C bus; see the [[Reference/Wire | documentation]] for details. To use the SPI communication, please see the ATmega168 or ATmega328 datasheet.
Changed lines 78-83 from:
The Arduino Nano can be programmed with the Arduino software ([[Main/Software | download]]). For details, see the [[Reference/HomePage | reference]] and [[Tutorial/HomePage | tutorials]].

The ATmega168 on the Arduino Nano comes preburned with a [[Tutorial/Bootloader | bootloader]] that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol ([[http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf | reference]], [[http://www.atmel.com/dyn/resources/prod_documents/avr061.zip | C header files]]).

You can also bypass the bootloader and program the ATmega168 through the ICSP (In-Circuit Serial Programming) header; see [[Hacking/Programmer | these instructions]] for details.
to:
The Arduino Nano can be programmed with the Arduino software ([[Main/Software | download]]). Select "Arduino Diecimila, Duemilanove, or Nano w/ ATmega168" or "Arduino Duemilanove or Nano w/ ATmega328" from the '''Tools > Board''' menu (according to the microcontroller on your board). For details, see the [[Reference/HomePage | reference]] and [[Tutorial/HomePage | tutorials]].

The ATmega168 or ATmega328 on the Arduino Nano comes preburned with a [[Tutorial/Bootloader | bootloader]] that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol ([[http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf | reference]], [[http://www.atmel.com/dyn/resources/prod_documents/avr061.zip | C header files]]).

You can also bypass the bootloader and program the microcontroller through the ICSP (In-Circuit Serial Programming) header; see [[Hacking/Programmer | these instructions]] for details.
Changed lines 86-87 from:
Rather then requiring a physical press of the reset button before an upload, the Arduino Nano is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines (DTR) of the FT232RL is connected to the reset line of the ATmega168 via a 100 nanofarad capacitor. When this line is asserted (taken low), the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be well-coordinated with the start of the upload.
to:
Rather then requiring a physical press of the reset button before an upload, the Arduino Nano is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines (DTR) of the FT232RL is connected to the reset line of the ATmega168 or ATmega328 via a 100 nanofarad capacitor. When this line is asserted (taken low), the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be well-coordinated with the start of the upload.
October 21, 2008, at 06:07 PM by Tom Igoe -
Changed line 15 from:
[[Attach:ArduinoNanoManual23.pdf | Arduino Nano Manual]] (pdf)
to:
[[Attach:ArduinoNanoManual23.pdf | Arduino Nano Manual]] (pdf)\\
October 21, 2008, at 06:07 PM by Tom Igoe -
Changed lines 11-12 from:
to:
Nano�s got the breadboard-ability of the Boarduino and the Mini+USB with smaller footprint than either, so users have more breadboard space. It�s got a pin layout that works well with the Mini or the Basic Stamp (TX, RX, ATN, GND on one top, power and ground on the other). It�s a four-layer board with power and ground planes to help provide ICs with sufficient charge during switching and reduce noise (EMC) on high speed switching I/O pins. Ground plane help reduce radiation (EMI). Power plane is low in inductance; therefore any transients that may develop on the power line will be at lower levels.
Changed lines 16-17 from:
to:
[[http://gravitech.us/Arduino/Arduino_Nano_V2_3_Eagle.zip | Eagle files]] ''note: since the free version of Eagle does not handle more than 2 layers,and the Nano is currently 4-layer board, Gravitech publishes it here as unrouted, so users can at least open it and use it in the free version of Eagle''
Changed lines 32-34 from:
to:
||Dimensions ||0.73� x 1.70� ||

Changed line 45 from:
to:
* Standard 0.1� spacing DIP (breadboard friendly)
June 27, 2008, at 04:33 PM by David A. Mellis -
Changed lines 15-16 from:
[[Attach:ArduinoNanoManual.pdf | Arduino Nano Manual]] (pdf)
to:
[[Attach:ArduinoNanoManual23.pdf | Arduino Nano Manual]] (pdf)
June 24, 2008, at 08:06 PM by David A. Mellis -
Changed lines 15-16 from:
Attach:ArduinoNanoManual.pdf
to:
[[Attach:ArduinoNanoManual.pdf | Arduino Nano Manual]] (pdf)
June 18, 2008, at 04:16 PM by David A. Mellis -
Deleted lines 4-5:
%red% The Arduino Nano is currently [[http://store.gravitech.us/arduino-nano1.html | available for pre-order]] from Gravitech. The boards will ship on June 16th.
June 08, 2008, at 06:22 PM by David A. Mellis -
Changed lines 61-62 from:
Each of the 14 digital pins on the Diecimila can be used as an input or output, using [[Reference/PinMode | pinMode()]], [[Reference/DigitalWrite | digitalWrite()]], and [[Reference/DigitalRead | digitalRead()]] functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. In addition, some pins have specialized functions:
to:
Each of the 14 digital pins on the Nano can be used as an input or output, using [[Reference/PinMode | pinMode()]], [[Reference/DigitalWrite | digitalWrite()]], and [[Reference/DigitalRead | digitalRead()]] functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. In addition, some pins have specialized functions:
Changed lines 73-74 from:
The Diecimila has 6 analog inputs, each of which provide 10 bits of resolution (i.e. 1024 different values). By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the AREF pin and some low-level code. Additionally, some pins have specialized functionality:
to:
The Nano has 8 analog inputs, each of which provide 10 bits of resolution (i.e. 1024 different values). By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the [[Reference/AnalogReference | analogReference()]] function. Additionally, some pins have specialized functionality:
June 08, 2008, at 06:20 PM by David A. Mellis -
Deleted lines 48-62:
!!!Programming

The Arduino Nano can be programmed with the Arduino software ([[Main/Software | download]]). For details, see the [[Reference/HomePage | reference]] and [[Tutorial/HomePage | tutorials]].

The ATmega168 on the Arduino Nano comes preburned with a [[Tutorial/Bootloader | bootloader]] that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol ([[http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf | reference]], [[http://www.atmel.com/dyn/resources/prod_documents/avr061.zip | C header files]]).

You can also bypass the bootloader and program the ATmega168 through the ICSP (In-Circuit Serial Programming) header; see [[Hacking/Programmer | these instructions]] for details.


!!!Automatic (Software) Reset

Rather then requiring a physical press of the reset button before an upload, the Arduino Nano is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines (DTR) of the FT232RL is connected to the reset line of the ATmega168 via a 100 nanofarad capacitor. When this line is asserted (taken low), the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be well-coordinated with the start of the upload.

This setup has other implications. When the Nano is connected to either a computer running Mac OS X or Linux, it resets each time a connection is made to it from software (via USB). For the following half-second or so, the bootloader is running on the Nano. While it is programmed to ignore malformed data (i.e. anything besides an upload of new code), it will intercept the first few bytes of data sent to the board after a connection is opened. If a sketch running on the board receives one-time configuration or other data when it first starts, make sure that the software with which it communicates waits a second after opening the connection and before sending this data.
Changed lines 53-98 from:
The FTDI FT232RL chip on the Nano is only powered if the board is being powered over USB. As a result, when running on external (non-USB) power, the 3.3V output (which is supplied by the FTDI chip) is not available and the RX and TX LEDs will flicker if digital pins 0 or 1 are high.
to:
The FTDI FT232RL chip on the Nano is only powered if the board is being powered over USB. As a result, when running on external (non-USB) power, the 3.3V output (which is supplied by the FTDI chip) is not available and the RX and TX LEDs will flicker if digital pins 0 or 1 are high.

!!!Memory

The ATmega168 on the Nano has 16 KB of flash memory for storing code (of which 2 KB is used for the bootloader). It has 1 KB of SRAM and 512 bytes of EEPROM (which can be read and written with the [[http://www.arduino.cc/en/Reference/EEPROM | EEPROM library]]).

!!!Input and Output

Each of the 14 digital pins on the Diecimila can be used as an input or output, using [[Reference/PinMode | pinMode()]], [[Reference/DigitalWrite | digitalWrite()]], and [[Reference/DigitalRead | digitalRead()]] functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. In addition, some pins have specialized functions:

* '''Serial: 0 (RX) and 1 (TX).''' Used to receive (RX) and transmit (TX) TTL serial data. These pins are connected to the corresponding pins of the FTDI USB-to-TTL Serial chip.

* '''External Interrupts: 2 and 3.''' These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the [[Reference/AttachInterrupt | attachInterrupt()]] function for details.

* '''PWM: 3, 5, 6, 9, 10, and 11.''' Provide 8-bit PWM output with the [[Reference/AnalogWrite | analogWrite()]] function.

* '''SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK).''' These pins support SPI communication, which, although provided by the underlying hardware, is not currently included in the Arduino language.

* '''LED: 13.''' There is a built-in LED connected to digital pin 13. When the pin is HIGH value, the LED is on, when the pin is LOW, it's off.

The Diecimila has 6 analog inputs, each of which provide 10 bits of resolution (i.e. 1024 different values). By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the AREF pin and some low-level code. Additionally, some pins have specialized functionality:

* '''I'^2^'C: 4 (SDA) and 5 (SCL).''' Support I'^2^'C (TWI) communication using the [[http://wiring.org.co/reference/libraries/Wire/index.html | Wire library]] (documentation on the Wiring website).

There are a couple of other pins on the board:

* '''AREF.''' Reference voltage for the analog inputs. Used with [[Reference/AnalogReference | analogReference]]().

* '''Reset.''' Bring this line LOW to reset the microcontroller. Typically used to add a reset button to shields which block the one on the board.

See also the [[Hacking/PinMapping168 | mapping between Arduino pins and ATmega168 ports]].

!!!Programming

The Arduino Nano can be programmed with the Arduino software ([[Main/Software | download]]). For details, see the [[Reference/HomePage | reference]] and [[Tutorial/HomePage | tutorials]].

The ATmega168 on the Arduino Nano comes preburned with a [[Tutorial/Bootloader | bootloader]] that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol ([[http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf | reference]], [[http://www.atmel.com/dyn/resources/prod_documents/avr061.zip | C header files]]).

You can also bypass the bootloader and program the ATmega168 through the ICSP (In-Circuit Serial Programming) header; see [[Hacking/Programmer | these instructions]] for details.

!!!Automatic (Software) Reset

Rather then requiring a physical press of the reset button before an upload, the Arduino Nano is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines (DTR) of the FT232RL is connected to the reset line of the ATmega168 via a 100 nanofarad capacitor. When this line is asserted (taken low), the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be well-coordinated with the start of the upload.

This setup has other implications. When the Nano is connected to either a computer running Mac OS X or Linux, it resets each time a connection is made to it from software (via USB). For the following half-second or so, the bootloader is running on the Nano. While it is programmed to ignore malformed data (i.e. anything besides an upload of new code), it will intercept the first few bytes of data sent to the board after a connection is opened. If a sketch running on the board receives one-time configuration or other data when it first starts, make sure that the software with which it communicates waits a second after opening the connection and before sending this data.
June 05, 2008, at 04:10 AM by David A. Mellis -
Changed lines 66-68 from:
The Arduino Nano can be powered via the mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.
to:
The Arduino Nano can be powered via the mini-B USB connection, 6-20V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source.

The FTDI FT232RL chip on the Nano is only powered if the board is being powered over USB. As a result, when running on external (non-USB) power, the 3.3V output (which is supplied by the FTDI chip) is not available and the RX and TX LEDs will flicker if digital pins 0 or 1 are high.
June 02, 2008, at 03:20 AM by David A. Mellis -
Changed lines 53-54 from:
The ATmega168 on the Arduino Diecimila comes preburned with a [[Tutorial/Bootloader | bootloader]] that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol ([[http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf | reference]], [[http://www.atmel.com/dyn/resources/prod_documents/avr061.zip | C header files]]).
to:
The ATmega168 on the Arduino Nano comes preburned with a [[Tutorial/Bootloader | bootloader]] that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol ([[http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf | reference]], [[http://www.atmel.com/dyn/resources/prod_documents/avr061.zip | C header files]]).
June 02, 2008, at 03:02 AM by David A. Mellis -
Changed lines 49-50 from:
!!!Programm
to:
!!!Programming
Added lines 58-63:
!!!Automatic (Software) Reset

Rather then requiring a physical press of the reset button before an upload, the Arduino Nano is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines (DTR) of the FT232RL is connected to the reset line of the ATmega168 via a 100 nanofarad capacitor. When this line is asserted (taken low), the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be well-coordinated with the start of the upload.

This setup has other implications. When the Nano is connected to either a computer running Mac OS X or Linux, it resets each time a connection is made to it from software (via USB). For the following half-second or so, the bootloader is running on the Nano. While it is programmed to ignore malformed data (i.e. anything besides an upload of new code), it will intercept the first few bytes of data sent to the board after a connection is opened. If a sketch running on the board receives one-time configuration or other data when it first starts, make sure that the software with which it communicates waits a second after opening the connection and before sending this data.
June 02, 2008, at 03:00 AM by David A. Mellis -
Changed lines 49-57 from:
to:
!!!Programm

The Arduino Nano can be programmed with the Arduino software ([[Main/Software | download]]). For details, see the [[Reference/HomePage | reference]] and [[Tutorial/HomePage | tutorials]].

The ATmega168 on the Arduino Diecimila comes preburned with a [[Tutorial/Bootloader | bootloader]] that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol ([[http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf | reference]], [[http://www.atmel.com/dyn/resources/prod_documents/avr061.zip | C header files]]).

You can also bypass the bootloader and program the ATmega168 through the ICSP (In-Circuit Serial Programming) header; see [[Hacking/Programmer | these instructions]] for details.

June 02, 2008, at 02:58 AM by David A. Mellis -
Changed lines 9-10 from:
Arduino Nano is a surface mount breadboard embedded version with integrated USB. It is a smallest, complete, and breadboard friendly. The Nano was designed by Gravitech.
to:
Arduino Nano is a surface mount breadboard embedded version with integrated USB. It is a smallest, complete, and breadboard friendly. The Nano was designed and is being produced by Gravitech.
May 19, 2008, at 04:15 PM by David A. Mellis -
Added lines 5-6:
%red% The Arduino Nano is currently [[http://store.gravitech.us/arduino-nano1.html | available for pre-order]] from Gravitech. The boards will ship on June 16th.
May 15, 2008, at 03:14 AM by David A. Mellis -
Added lines 13-16:
!!!Schematic and Design

Attach:ArduinoNanoManual.pdf
May 15, 2008, at 03:11 AM by David A. Mellis -
Deleted lines 12-14:
You end up paying less with Nano than Mini and USB combined!

May 15, 2008, at 03:10 AM by David A. Mellis -
Changed lines 7-8 from:
Arduino Nano is a surface mount breadboard embedded version with integrated USB. It is a smallest, complete, and breadboard friendly. It has everything that Diecimila has (electrically) with more analog input pins and onboard +5V AREF jumper. Physically, it is missing power jack and power select jumper. Since the Nano is automatically sense and switch to the higher potential source of power, there is no need for the power select jumper.
to:
Arduino Nano is a surface mount breadboard embedded version with integrated USB. It is a smallest, complete, and breadboard friendly. The Nano was designed by Gravitech.

It has everything that Diecimila has (electrically) with more analog input pins and onboard +5V AREF jumper. Physically, it is missing power jack and power select jumper. Since the Nano is automatically sense and switch to the higher potential source of power, there is no need for the power select jumper.
May 15, 2008, at 03:08 AM by David A. Mellis -
Changed lines 3-4 from:
|| Attach:ArduinoNanoTop.jpg || Attach:ArduinoNanoBottom.jpg
to:
||Attach:ArduinoNanoTop.jpg ||Attach:ArduinoNanoBottom.jpg
May 15, 2008, at 03:07 AM by David A. Mellis -
Added lines 1-47:

Share