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× 2905
the most common of the Arduino boards. It is based on the ATmega328 microcontroller.
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serial× 853
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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arduino-mega× 661
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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programming× 636
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× 476
for questions about selecting, connecting, using, and debugging sensors.
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c++× 440
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-ide× 345
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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power× 337
for questions regarding powering and/or power consumption of Arduino systems.
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led× 298
a type of light source which is typically fairly small and has low power requirements.
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bluetooth× 284
Bluetooth enables short-range wireless communication between devices.
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motor× 282
for questions about connecting, controlling, and safely operating motors using an Arduino board.
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esp8266× 261
An IC that offers Wi-Fi networking compatible with b/g/n standards. It also has integrated TCP/IP protocol stack. Extremely popular along IoT community as a low cost and powerful board.
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arduino-nano× 241
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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wifi× 217
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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arduino-due× 215
an microcontroller card based on the Atmel SAM3X8E ARM Cortex-M3 CPU. This is a 32bit ARM core MCU.
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i2c× 206
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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shields× 204
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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library× 197
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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lcd× 195
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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usb× 192
Widely used standard for connecting computers to other devices, such as printers and keyboards.
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gsm× 189
a very widely used standard for communication over mobile phone networks.
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pins× 187
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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ethernet× 186
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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servo× 170
a type of motor which uses a feedback mechanism for precise control of speed and position.
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pwm× 169
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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c× 167
a procedural programming language which is widely used in embedded systems. PLEASE NOTE: Arduino is typically programmed in C++, not C.
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interrupt× 162
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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communication× 159
for questions about communication between multiple devices.
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arduino-yun× 152
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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atmega328× 151
the chip that is the heart of the Arduino Uno. It is popular also as a chip to use to create your own board. Since it is available in the through hole version, it can be placed on a b…
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arduino-leonardo× 145
An Arduino board based on the ATmega32u4 chip with built in USB HID functionality
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softwareserial× 143
A library for emulating UART functionality in software on any available digital IO pins. Use this tag for questions regarding SoftwareSerial.
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sketch× 138
compiled code that is uploaded to an Arduino board.
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hardware× 133
The physical circuitry and other components of a machine or device. This is distinct from the program code running on a device, which may be called software or firmware.
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bootloader× 130
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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voltage-level× 129
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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