Arduino Uno Handleiding

Arduino Niet gecategoriseerd Uno

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Arduino Uno

Overview

The Arduino Uno is a microcontroller board based on the ATmega328 ( ). It has 14 digitaldatasheet

input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz crystal oscillator, a

USB connection, a power jack, an ICSP header, and a reset button. It contains everything needed to

support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC

adapter or battery to get started.

The Uno diers from all preceding boards in that it does not use the FTDI USB-to-serial driver chip.

Instead, it features the Atmega8U2 programmed as a USB-to-serial converter.

"Uno" means one in Italian and is named to mark the upcoming release of Arduino 1.0. The Uno and

version 1.0 will be the reference versions of Arduno, moving forward. The Uno is the latest in a series of

USB Arduino boards, and the reference model for the Arduino platform; for a comparison with previous

versions, see the index of Arduino boards.

Summary

Microcontroller ATmega328

Operating Voltage 5V

Input Voltage (recommended) 7-12V

Input Voltage (limits) 6-20V

Digital I/O Pins 14 (of which 6 provide PWM output)

Analog Input Pins 6

DC Current per I/O Pin 40 mA

DC Current for 3.3V Pin 50 mA

Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader

SRAM 2 KB (ATmega328)

EEPROM 1 KB (ATmega328)

Clock Speed 16 MHz

Schematic & Reference Design

EAGLE les: arduino-uno-reference-design.zip

Schematic: arduino-uno-schematic.pdf

Power

The Arduino Uno can be powered via the USB connection or with an external power supply. The power

source is selected automatically.

External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter

can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a

battery can be inserted in the Gnd and Vin pin headers of the POWER connector.

The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V, however, the

5V pin may supply less than ve volts and the board may be unstable. If using more than 12V, the voltage

regulator may overheat and damage the board. The recommended range is 7 to 12 volts.

The power pins are as follows:

VIN. The input voltage to the Arduino board when it's using an external power source (as opposed to

5 volts from the USB connection or other regulated power source). You can supply voltage through

this pin, or, if supplying voltage via the power jack, access it through this pin.

5V. The regulated power supply used to power the microcontroller and other components on the

board. This can come either from VIN via an on-board regulator, or be supplied by USB or another

regulated 5V supply.

3V3. A 3.3 volt supply generated by the on-board regulator. Maximum current draw is 50 mA.

GND. Ground pins.

Memory

The ATmega328 has 32 KB (with 0.5 KB used for the bootloader). It also has 2 KB of SRAM and 1 KB of

EEPROM (which can be read and written with the EEPROM library ).

Input and Output

Each of the 14 digital pins on the Uno can be used as an input or output, using ,pinMode(), digitalWrite()

and 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 ATmega8U2 USB-to-TTL Serial chip.

External Interrupts: 2 and 3. These pins can be congured to trigger an interrupt on a low value,

a rising or falling edge, or a change in value. See the attachInterrupt() function for details.

PWM: 3, 5, 6, 9, 10, and 11. Provide 8-bit PWM output with the function.analogWrite()

SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK). These pins support SPI communication using

the SPI library.

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 o.

The Uno has 6 analog inputs, labeled A0 through A5, each of which provide 10 bits of resolution (i.e. 1024

dierent 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 the analogReference () function. Additionally, some pins have

specialized functionality:

I2C: 4 (SDA) and 5 (SCL). Support I2C (TWI) communication using the .Wire library

There are a couple of other pins on the board:

AREF. Reference voltage for the analog inputs. Used with ().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 .mapping between Arduino pins and ATmega328 ports?

Communication

The Arduino UNo has a number of facilities for communicating with a computer, another Arduino, or other

microcontrollers. The ATmega328 provides UART TTL (5V) serial communication, which is available on

digital pins 0 (RX) and 1 (TX). An ATmega8U2 on the board channels this serial communication over USB

and appears as a virtual com port to software on the computer. The '8U2 rmware uses the standard USB

COM drivers, and no external driver is needed. However, on Windows, a .inf le is required . The Arduino

Product specificaties

Merk:	Arduino
Categorie:	Niet gecategoriseerd
Model:	Uno
Frequentie van processor:	- MHz
Vormfactor:	Arduino
Ethernet LAN:	Nee
DC voltage input:	7-12 V
Certificering:	RoHS, FC, CE
Maximum intern geheugen:	- GB
Flash memory:	0.032 MB
Operating voltage:	5 V
Wifi:	Nee
Model microcontroller:	ATmega328
Gelijkstroom per I/O-pin:	40 mA
Aantal digitale I/O pinnen:	14
Aantal analoge I/O pinnen:	6
SRAM (Static Random Access Memory):	2 KB
EEPROM (Electrically Erasable Programmable Read-Only Memory):	1 KB
Afmetingen bord:	53.4 x 68.6 mm
Microcontroller-frequentie:	16 MHz
PWM digitale I/O-pinnen:	6