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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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A programming language and an IDE based on Java, but with simplified syntax and graphics programming model.
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An Integrated Development Platform for programming and debugging various Atmel microcontrollers including AVRs (which are used in many Arduino boards).
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This should be used when referring to the transmission protocol TCP/IP.
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for questions relating to computer software used for interaction with the Arduino. For example, you could use this tag for questions about programming environments, or you could use it f…
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The program code stored/running on an embedded device. The term is sometimes used interchangeably with "software".
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a simple protocol for serial communication between electronic devices.
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a programming language used primarily for numerical computations. Use this tag for questions regarding communicating or using MATLAB with Arduino. Also consider using other tags such as [pro…
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A small microcontroller board based on the ATmega168 or ATmega328 chip. Use this tag for questions specifically regarding the Mini, and not just general Arduino usage.
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For questions about the HC-SR04 ultrasonic ranging sensor.
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a legal, Arduino-like board developed by a third party using the original schematics for the board (with a few minor adjustments). If significant changes are made, it is called a derivative…
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for questions about timing code execution, or external events.
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refers to the prefix of Piezoelectricity.
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is for the well-being of the people and objects around you, and yourself.
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to indicate the flow of electricity at higher voltage than that used in Arduinos themselves. Examples can include having an Arduino use a relay to switch the electricity for a 120 Volt d…
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a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other
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it refers to the standard for serial communication transmission of data.
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Refers to the Arduino-specific library code which is included as standard with the official Arduino IDE.
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a metafamily of graphical operating systems developed, marketed, and sold by Microsoft.
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It refers to a seven-segment display (SSD) is a form of electronic display device for displaying decimal numerals.
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A distribution of the Linux operating system. Use this tag for issues which are specific to working with Arduino in an Ubuntu environment (e.g. uploading a program to an Arduino board from a computer …
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A microcontroller board based on the Intel Quark SoC X1000 Application Processor, a 32-bit Intel Pentium-class system on a chip, designed to be hardware and software pin-compatible with shields design…
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a control loop feedback mechanism (controller) commonly used in industrial control systems. Use this tag for discussions about PID algorithms and libraries.
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For questions about using an Arduino to automate a home environment. For general home automation questions that aren't about Arduino, ask at Internet of Things Stack Exchange instead.
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a common problem with mechanical switches and relays. Debounce or debouncing is an a hardware or software technique to eliminate this effect.
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Refers to the symbol rate and so the number of symbol that changes per time unit.
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Refers to the sum total of software, circuit diagrams, documentation, libraries, and hardware that make up an Arduino based application.
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In-Circuit Serial Programming, when you program the chip without having to physically remove it and place it in a programmer.