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This tutorial shows how to send MIDI notes from an Arduino board to a MIDI instrument connected through the standard 5 poles DIN cable. MIDI, the Musical Instrument Digital Interface, is a useful protocol for controlling synthesizers, sequencers, and other musical devices. MIDI devices are generally grouped in to two broad classes: controllers (i.e. devices that generate MIDI signals based on huma
The Arduino Ethernet Shield 2 connects your Arduino to the internet in mere minutes. Just plug this module onto your Arduino Board, connect it to your network with an RJ45 cable and follow a few simple steps to start controlling your world through the internet. As always with Arduino, every element of the platform – hardware, software and documentation – is freely available and open-source. This m
Home / Programming / Built-in Examples / Play a Melody using the tone() function Play a Melody using the tone() functionPlay a melody with a Piezo speaker. This example shows how to use the tone() command to generate notes. It plays a little melody you may have heard before. Hardware RequiredArduino board piezo buzzer or a speaker hook-up wires Circuit Schematic CodeThe code below uses an extra fi
There’s a brand new site for official Arduino documentation, with almost 200 new tutorials, an improved getting started experience and product pages with all the technical info. Welcome to Arduino! Before you start controlling the world around you, you'll need to set up the software to program your board. The Arduino Software (IDE) allows you to write programs and upload them to your board. In the
Home / Hardware / Legacy Documentation / ATmega168/328P-Arduino Pin Mapping ATmega168/328P-Arduino Pin Mappinga diagram showing the correspondence between the pins on an Arduino board and those of the ATmega168/328P microcontroller. Note that this chart is for the DIP-package chip. The Arduino Mini is based upon a smaller physical IC package that includes two extra ADC pins, which are not availabl
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General Electronics Resistors, capacitors, breadboards, soldering, etc.
This library allows you to communicate with I2C devices, a feature that is present on all Arduino boards. I2C is a very common protocol, primarly used for reading/sending data to/from external I2C components. To learn more, visit this article for Arduino & I2C. Due to the hardware design and various architectural differences, the I2C pins are located in different places. The pin map just below hig
Firmata LibraryThe Firmata library implements the Firmata protocol for communicating with software on the host computer. The Firmata library implements the Firmata protocol for communicating with software on the host computer. This allows you to write custom firmware without having to create your own protocol and objects for the programming environment that you are using. To use this library
The Arduino Reference text is licensed under a Creative Commons Attribution-Share Alike 3.0 License. Find anything that can be improved? Suggest corrections and new documentation via GitHub. Doubts on how to use Github? Learn everything you need to know in this tutorial. Language Reference Arduino programming language can be divided in three main parts: functions, values (variables and constants),
Example 1: One Shift RegisterThe first step is to extend your Arduino with one shift register. The Circuit1. Turning it onMake the following connections: GND (pin 8) to ground, Vcc (pin 16) to 5V OE (pin 13) to ground MR (pin 10) to 5V This set up makes all of the output pins active and addressable all the time. The one flaw of this set up is that you end up with the lights turning on to their las
Home / Software / Arduino IDE 1 Installation (macOS) Arduino IDE 1 Installation (macOS)Install the Arduino Software (IDE) on macOS This document explains how to install the Arduino Software (IDE) on macOS machines. Download the Arduino Software (IDE)Get the latest version from the download page. The file is in Zip format. If you use Safari it will be automatically extracted. If you use a different
Home / Programming / Built-in Examples / Create a Graph with Processing Create a Graph with ProcessingSend data to the computer and graph it in Processing. This example shows you how to send a byte of data from the Arduino to a personal computer and graph the result. This is called serial communication because the connection appears to both the board and the computer as a serial port, even though
Schematic & Reference DesignEAGLE files: arduino-duemilanove-reference-design.zip Schematic: arduino-duemilanove-schematic.pdf PowerThe Arduino Duemilanove 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 pluggi
Home / Learn / Writing a Library for Arduino Writing a Library for ArduinoCreating libraries to extend the functionality of Arduino. Goes step-by-step through the process of making a library from a sketch. This document explains how to create a library for Arduino. It starts with a sketch for flashing Morse code and explains how to convert its functions into a library. This allows other people to
Arduino Xbee ShieldOverviewThe Xbee shield allows an Arduino board to communicate wirelessly using Zigbee. It is based on the Xbee module from MaxStream. The module can communicate up to 100 feet indoors or 300 feet outdoors (with line-of-sight). It can be used as a serial/usb replacement or you can put it into a command mode and configure it for a variety of broadcast and mesh networking options.
Open-source electronic prototyping platform enabling users to create interactive electronic objects.
Arduino Web EditorStart coding online and save your sketches in the cloud. The most up-to-date version of the IDE includes all libraries and also supports new Arduino boards. Arduino IDE 2.3.2The new major release of the Arduino IDE is faster and even more powerful! In addition to a more modern editor and a more responsive interface it features autocompletion, code navigation, and even a live debu
The first parameter to attachInterrupt() is an interrupt number. Normally you should use digitalPinToInterrupt(pin) to translate the actual digital pin to the specific interrupt number. For example, if you connect to pin 3, use digitalPinToInterrupt(3) as the first parameter to attachInterrupt().
Arduino Playground is read-only starting December 31st, 2018. For more info please look at this Forum Post The Arduino Playground Welcome to the Arduino Playground, a wiki where all the users of Arduino can contribute and benefit from their collective research. This is the place to post and share your own code, circuit diagrams, tutorials, DIY instructions, tips and tricks, and after all the hard
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