A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
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arduino-uno× 270
the most common and one of the newest Arduino boards. It is based on the ATmega328 microcontroller.
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serial× 109
the standard USB connection between the Arduino and a computer with a standard USB A to B cable or through the TX/RX pins using a USB to serial converter. It can also refer to …
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programming× 102
The process of designing and writing source code as part of a program (or sketch) for Arduino. Do not use for uploading to an Arduino board.
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sensors× 55
for questions about selecting, connecting, using, and debugging sensors.
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arduino-mega× 49
A microcontroller board based on the ATmega2560 or 1280 chip. Use this tag for questions specifically regarding the Mega, and not just general Arduino usage.
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pins× 38
like gateways between the Arduino code running on the chip and the components attached to Arduino. It can refer either to the physical connectors on the board, or it can refer to the pins d…
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c++× 36
the standard language used to program the Arduino IDE. However, the Arduino IDE does have lots of libraries built in, so functions such as "main" are not called directly in the sketch code. Mos…
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arduino-due× 30
an microcontroller card based on the Atmel SAM3X8E ARM Cortex-M3 CPU. This is a 32bit ARM core MCU.
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shields× 30
attachments that "snap" onto the Arduino board adding functionality. They are usually the same shape as an Uno/Leonardo/Duemilanove. Some examples are: the Ethernet (includes SD port) shie…
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power× 30
for questions regarding powering and/or power consumption of Arduino systems.
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uploading× 29
the process of updating or changing the sketch on the Arduino board. It does not refer to uploading to a server or a website.
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wifi× 29
WiFi allows devices to wirelessly connect to a network, and the Internet. Use this tag for questions relating to connecting your Arduino to a WiFi network.
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motor× 28
for questions about connecting, controlling, and safely operating motors using an Arduino board.
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led× 28
a type of light source which is typically fairly small and has low power requirements.
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arduino-yun× 28
a microcontroller board based on the ATmega32u4 and the Atheros AR9331. Use this tag for questions specifically regarding the Yún, and not just general Arduino usage.
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gsm× 26
a very widely used standard for communication over mobile phone networks.
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i2c× 26
a bus for low speed peripherals. Use this tag for questions regarding how to use I²C with an Arduino, or for problems with I²C and your Arduino.
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arduino-leonardo× 25
An Arduino board based on the ATmega32u4 chip with built in USB HID functionality
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xbee× 24
a family of form factor compatible radio modules. Most are based on the 802.15.4-2003 standard.
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library× 22
a file that can be included into the code to add new instructions by combining many existing instructions and creating one easy to use instruction to call.
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bootloader× 21
Refers to the code burned on the Arduino flash memory that runs every time the board is powered up. It starts the execution of user-loaded programs and allows uploading sketches from a PC through the …
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bluetooth× 20
Bluetooth enables short-range wireless communication between devices.
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sketch× 20
compiled code that is uploaded to an Arduino board.
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lcd× 19
LCD stands for "Liquid Crystal Display" and is commonly known as a screen. They are found in all flat-screen monitors and televisions. They can make many colors and shapes, but are hard to control. (N…
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interrupt× 19
Interrupts allow the processor to suspend normal operation temporarily so that a high-priority software or hardware event can be handled instead.
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arduino-nano× 18
a small board based on the ATmega328 or 168. It has male headers, so it can be plugged directly into a breadboard. It is small and compact, and features a USB chip.
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voltage-level× 17
Voltage level should be used for questions that are referring to using hardware together that operates on different voltages (the "concentration" of electricity).
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web-server× 15
a system which delivers data such as web-pages to a client system.
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timers× 15
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arduino-ide× 15
for questions about the official IDE. The open-source IDE makes it easy to write code and upload it to any Arduino board. It runs on Windows, Mac OS X, and Linux.
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ethernet× 15
Ethernet can be used for communication between an Arduino and a computer, server, or website. For question concerning the Arduino Ethernet board, use the tag "arduino-ethernet" instead.
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pwm× 14
a form of signal modulation that allows digital output to approximate an analog signal. Use this for questions about using the PWM pins (marked with ~).
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time× 14
for questions regarding how to get the time on an Arduino, how to create or use clocks with an Arduino, or anything that has time as a substantial factor in it. Also consider using [progr…
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safety× 13
is for the well-being of the people and objects around you, and yourself.
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battery× 12
an electrical power source which is often portable.
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avr× 12
the family of microcontrollers used in Arduino boards.
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