![]() ![]() The two forked the Wiring source code and started running it as a separate project, called Arduino. In 2005, Massimo Banzi, with David Mellis (then an IDII student) and David Cuartielles, added support for the cheaper ATmega8 micro-controller to Wiring. The Wiring platform consisted of a hardware PCB with an ATmega128 micro-controller, an integrated development environment (IDE) based on Processing, and library functions to easily program the micro-controller. The goal was to create low-cost, simple tools for non-engineers to create digital projects. Today, this term is well known as referring to a project and a community.Īll started when Hernando Barragán, a Colombian student, created the development platform Wiring as his Master thesis project in 2004. The name Arduino comes from a bar in Ivrea, Italy, where some of the founders of the project used to meet. ![]() In case you are using the USB connector from your PC to power the Arduino board, be aware that short-circuits which may occur on the Arduino board may also have a negative impact on your PC!Ĭredits: some of the images from this tutorial are created by using Fritzing, a nice electronics modeling tool for beginners. We cannot be held responsible for any caused damage! Do it at your own risk and/or ask help from an electronics engineer. ![]() However, the low voltage may be obtained from a mains connected power brick, and therefore we highly recommend you to take safety precautions and to use a trustful brand for the power supply. For this project we'll use 5V, which is safe for the human body under any environment conditions. As a newbie, it is helpful if you already have some basic C/C++ programming knowledge and understanding of some Web standards and programming languages, such as HTML and JavaScript.ĭisclaimer: working with electricity is dangerous. Using standard Web technologies, such as HTTP and Web Sockets, we can then access the data or provide commands to the WoT nodes. In the following parts of this tutorial, which will appear every 1-2 weeks, we discuss how to read sensors, control actuators, and how to connect them all together in a Web of Things (WoT) network. This first part shows the very basics of an Arduino program (known as a "sketch") and provides a quick introduction to some electronic components, such as resistors, RGB LEDs and LEDs in general. In general, LEDs that are over driven will grow dimmer and not recover.In this multi-part tutorial we show how to develop Arduino-based apps for the Web of Things (WoT). ![]() Go here for more about calculating the proper LED series resistance. Your specific LEDs may have different specifications. Given a blue LED which may have a 3.3 volt drop and may need 20mAmps to operate driven by a 5 volt source, we find the proper series resistor to be. Given a red LED which may have 1.8 volt drop and may need 20mAmps to operate driven by a 5 volt source, we find the proper series resistor to be. As such, when driving an LED with a constant voltage source, derive the proper series resistance for each case. So much so that the blue LED inventor was awarded the Nobel Prize!Ĭonsequently, it should not be assume all LEDs operate at the same voltage and current. And some colors (blue) were really hard to figure out. ![]()
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