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× 2485
the most common of the Arduino boards. It is based on the ATmega328 microcontroller.
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serial× 752
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× 550
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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arduino-mega× 542
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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sensors× 417
for questions about selecting, connecting, using, and debugging sensors.
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c++× 392
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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power× 291
for questions regarding powering and/or power consumption of Arduino systems.
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arduino-ide× 281
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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led× 268
a type of light source which is typically fairly small and has low power requirements.
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motor× 247
for questions about connecting, controlling, and safely operating motors using an Arduino board.
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bluetooth× 243
Bluetooth enables short-range wireless communication between devices.
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arduino-nano× 196
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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arduino-due× 193
an microcontroller card based on the Atmel SAM3X8E ARM Cortex-M3 CPU. This is a 32bit ARM core MCU.
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esp8266× 189
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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wifi× 186
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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i2c× 179
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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lcd× 175
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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shields× 174
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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gsm× 172
a very widely used standard for communication over mobile phone networks.
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library× 169
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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pins× 168
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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usb× 168
Widely used standard for connecting computers to other devices, such as printers and keyboards.
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ethernet× 161
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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arduino-yun× 140
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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pwm× 138
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× 137
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× 135
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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atmega328× 132
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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servo× 132
a type of motor which uses a feedback mechanism for precise control of speed and position.
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sketch× 129
compiled code that is uploaded to an Arduino board.
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arduino-leonardo× 127
An Arduino board based on the ATmega32u4 chip with built in USB HID functionality
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communication× 127
for questions about communication between multiple devices.
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softwareserial× 122
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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hardware× 118
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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voltage-level× 117
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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uploading× 115
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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