Strain gauges : ELECTRICAL INSTRUMENTATION SIGNALS If a strip of conductive metal is stretched, it will become skinnier and longer, both changes resulting in an increase of electrical resistance end-to-end. Conversely, if a strip of conductive metal is placed under compressive force (without buckling), it will broaden and shorten. If these stresses are kept within the elastic limit of the metal strip (so that the strip does not permanently deform), the strip can be used as a measuring element for physical force, the amount of applied force inferred from measuring its resistance. Such a device is called a strain gauge. A strain gauge's conductors are very thin: if made of round wire, about 1/1000 inch in diameter. Typical strain gauge resistances range from 30 Ω to 3 kΩ (unstressed). Such demanding precision calls for a bridge measurement circuit. Typically, the rheostat arm of the bridge (R2 in the diagram) is set at a value equal to the strain gauge resistance with no force applied.
Electrical Engineering News, Resources, and Community | EEWeb Mecatrónica | Oferta académica | ITESCAM Perfil del Egresado Es el Profesional especializado que aplica metodología científica y mediante el empleo de tecnología de punta, diseña soluciones a problemas complejos, en ámbitos relacionados con la mecánica de precisión, los sistemas electrónicos y las computadoras. Además, es capaz de diseñar y operar procesos de automatización en diversos tipos de empresas e industrias. Campo de Trabajo Es muy vasto ya que abarca desde la solución de problemas e implementación de mejoras en un sencillo proceso productivo hasta la total automatización y control de grandes líneas de producción. La Ingeniería en Mecatrónica es una base muy sólida sobre la cual pueden construirse especializaciones y postgrados que capaciten al Ingeniero para desenvolverse exitosamente en el campo de la investigación, desarrollando tecnología y generando conocimiento prácticamente en cualquier área.
Tutorial: Programación de PICs en Ensamblador - Asociación de Robotica y Domótica de España (A.R.D.E.) Introducción al PIC Introducción Bienvenidos al inicio del Tutorial sobre PICs. Estas páginas te llevaran desde la estructura básica del dispositivo, hasta los métodos y técnicas de programación. También habrá sugerencias de como modificar el código para que lo puedas adaptar el PIC a tus propias aplicaciones. Para empezar, echemos un vistazo al PIC. Microcontrolador Microchip PIC 16F84 Microchip fabrica una serie de microcontroladores llamados PIC. Hay diversas formas de programar el PIC, - usando BASIC, C, o Lenguaje Ensamblador. Los pines del 16F84 Mas abajo verás el diagrama de patillas(pines en adelante) del PIC 16F84. Error al crear miniatura: No se ha podido guardar la miniatura RA0 a RA4 RA es un puerto bidireccional. RB0 a RB7 RB es un segundo puerto bidireccional. VSS y VDD Estos son los pins de alimentación. OSC1/CLK IN y OSC2/CLKOUT Estos pines son donde conectaremos el reloj externo, para que el microcontrolador disponga de algún tipo de temporización. Como Programar el PIC BSF 03h,5
Welcome - Fritzing Getting Started with LabVIEW Interface for Arduino [LabVIEW Hacker] LIFA has been replaced with LINX. All new users should start with LINX and all current LIFA users should migrate to LINX. The LabVIEW Interface for Arduino (LIFA) allows users to control sensors and acquire data through an Arduino microcontroller using the graphical programming environment LabVIEW. This page describes the process of installing LIFA and its dependencies as well as running a basic LIFA example. Prerequisites Hardware Software Procedure Summary This getting started guide described the process of setting up the hardware and software to use the LabVIEW Interface for Arduino. Suggested Reading
PC Sound-Card Signal-Generator-Interface PC sound cards form a readily available Signal Generator for testing electronic circuits. The utility of these signal generators is limited because the outputs are AC coupled and limited to ±2V. Taking advantage of the two channels provided by the sound card this Instructable shows a scheme which uses one channel to output the Sin/Square/Triangle waveform with a fixed gain, while setting up a 441 Hz PWM square wave on the second channel. This PC sound-card interface implements a Signal-Generator with Sin/Square/Triangle output frequency variable from 50Hz to 10kHz, an amplitude variable from 0 to 5V and a variable DC offset of +/- 4V. As a bonus the MAX232 , SMD/DIP, provides a 40kHz / 100kHz signal which can be used for step-response testing of analog circuits. How I went about it: 1.
t r o n i x s t u f f Quantum mechanics 101: Demystifying tough physics in 4 easy lessons Ready to level up your working knowledge of quantum mechanics? Check out these four TED-Ed Lessons written by Chad Orzel, Associate Professor in the Department of Physics and Astronomy at Union College and author of How to Teach Quantum Physics to Your Dog. 1. Particles and waves: The central mystery of quantum mechanics One of the most amazing facts in physics is that everything in the universe, from light to electrons to atoms, behaves like both a particle and a wave at the same time. 2. Austrian physicist Erwin Schrödinger, one of the founders of quantum mechanics, posed this famous question: If you put a cat in a sealed box with a device that has a 50% chance of killing the cat in the next hour, what will be the state of the cat when that time is up? 3. When you think about Einstein and physics, E=mc^2 is probably the first thing that comes to mind. 4.
Practical Arduino: News How to Connect Multiple Arduino Microcontrollers with I2C Use I2c to connect several Arduinos together to combine their power. I2C stands for the Inter Integrated Circuits and is one of the best Multi Master Serial Computer Bus technologies used in different systems to connect the peripherals of low speed data transmission. The technology was invented by Philips for TVs but is used in all sorts of applications including our Wiimote and Arduino tutorial. The I2C circuits follow a standard operational procedure where only two bi-directional lines, a serial clock, and a serial data systems are used.  There are recently improved versions of I2Cs available on the market which can hold a higher number of nodes and can perform faster than the rest. Don’t miss: Top 40 Arduino Projects of the Web You can use I2C then you will be able to connect more than one Arduino to a robot or other application and you can easily establish a network of sensors. How To Set Up Your I2C
Introduction to I2C In this article Grinan Barrett introduces us to I2C. Grinan explains how I2C works, provides many useful links to information related to I2C and example Arduino code for a robot project where multiple Arduino boards are used for sensing and control. Grinan submitted this article to uCHobby as part of the uCHobby Giveaway program. What is I2C? I²C uses only two bidirectional open-drain lines, Serial Data (SDA) and Serial Clock (SCL), pulled up with resistors. The I²C reference design has a 7-bit address space with 16 reserved addresses, so a maximum of 112 nodes can communicate on the same bus. The maximum number of nodes is limited by the address space, and also by the total bus capacitance of 400 pF, which restricts practical communication distances to a few meters. Wikipedia Definition What exactly does the I2C protocol and usage mean to the average robot builder? A simple I2C network setup Setting up and using i2c · Two or more Arduino · The latest Arduino IDE · 2 – 1.5k pull up resistors
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