Beginners Guide Beginners Guide to Electronics by Martin T. Pickering Last updated on November 23, 2008 This book gives simplified explanations of how some electronic components work in a circuit. I first became interested in electronics when I was age 10 (as long ago as 1961). ©2008 Martin T. What's the Difference between A.C. and D.C.? How does a Resistor Work? All the colours for 5% tolerance resistors: How do Diodes Work? How do Transistors Work? Abbreviations Although we use the Greek symbol Omega W to represent “Ohms” it is frequently written as “R”. How does a Capacitor Work? What does a capacitor look like? How do Inductors Work? The Relay Bread Board and building a LED Flasher Building the LED Flasher Astable Multivibrator using two transistors
Drive a webpage in real-time using Arduino, SensorMonkey and Processing.js Remote visualization of real-time sensor data. This tutorial describes in detail how to use the free SensorMonkey service to push real-time sensor data from an Arduino to a webpage for visualization using Processing.js. No server-side coding or Ethernet shield is required. A standard, run of the mill Arduino will work perfectly. You'll also need a sensor to sample some values. After configuring the Arduino to sample sensor values, I use SensorMonkey to publish the data live over the Internet in real-time (Disclosure: I co-founded the company developing SensorMonkey). UPDATE 26-06-2012: Non-Windows Users As an alternative to Bloom for non-Windows users, I have uploaded a Processing sketch, named SensorMonkeySerialNet, to our GitHub account.
Maker Education Initiative | Every Child a Maker Exploring XBees and XCTU Favorited Favorite 1 Introduction Is your project being dragged down by wires? Looking for an easy transition to wireless communication? If you want reliable, low-cost, bi-directional communication at moderate speeds XBee may be the solution for you! XBees are hugely popular wireless transceivers for a number of reasons. Covered In This Tutorial The pair of XBees alone won’t get you very far. The focus of this tutorial is to explain how to use an XBee Explorer with an XBee. The Explorers: USB Explorer, Explorer Dongle, and Serial Explorer. With an XBee Explorer connected between your computer and your XBee, and with the help of the X-CTU software, you can easily configure XBees, test connections, and pass data between your computer and remote XBees. Materials Required XBees are really only useful if you have at least a pair of them. 2x XBees – XBees exist in a variety of series, frequencies, and ranges. Suggested Reading This tutorial builds on some lower-level electronics concepts. . .
(Rethinking) Makerspaces Kids have always made in my library. We encouraged digital and visual and dramatic and rhetorical creativity before, during, and after school. But for a while, I’ve questioned the value of using already heavily used real estate to randomly carve out space for a 3D printer, electronics stations and sewing machines. I had my doubts about the makerspace movement in school libraries. A couple of weeks ago I had the opportunity to chat with Amos Blanton, project manager of the Scratch online community, and a member of the Lifelong Kindergarten Group at MIT Media Lab. Amos makes the case for makerspaces as powerful, authentic, relevant learning experiences, and for when and why library may be the very right space to create a makerspace. Here’s the video of our chat and a few of key points to consider before adopting a maker culture for libraries Amos’ key points: School pressures make it challenging to make space for interest-driven learning.
Engineering ToolBox Carte SD et Arduino Voici une marche à suivre pour brancher un lecteur de carte SD (le modèle fabriqué par LC Studio qu'on feut facimement trouver sur eBay pour une bouchée de pain). Veuillez remarquer que cet article n'est pas l'article d'origine que j'avais rédigé et publié le 29 juin 2012: ce que vous lisez en ce moment a plutôt été rédigé le 5 mai 2013, alors que j'ai une bien meilleure expérience des lecteurs de carte SD. Dans mon article initial, je branchait directement le lecteur SD à l'Arduino, sans prendre la précaution d'abaisser le signal. Il faut éviter de procéder de cette façon: l'Arduino produit un signal de 5 V, alors que les cartes SD sont conçues pour fonctionner sous 3,3 V. Certains modules de cartes SD (plus élaborés, et donc plus coûteux) comportent déjà un circuit qui abaisse à 3,3 V les tensions d'entrée, mais ce n'est pas le cas du module fabriqué par LC Studio. Qu'arrive-t-il si vous acheminez à votre lecteur de carte SD des signaux de 5 V? Les connexions
Bubble Machine These are the tools and materials that I used for my bubble machine. Yours will differ greatly depending on what you have available. This is a great project to do with scraps, and odds and ends all hacked together. To make it easier for others to reproduce this, I've done away with my normal format of exactly what to use and instead broken it down into the five main components the machine's made from. Trough: To hold the bubble solution. Bubble Ring: A ring of holes that will spin slowly through the trough picking up the bubble solution. Motion: A slowly moving motor to spin the bubble ring. Blower: Something with a bit of puff. Power: A power source or two for the blower and spinner. You'll also need nuts, bolts, hot glue or superglue to hold everything together. The files I used for laser cutting are included in this step.
XBee Shield Hookup Guide Contributors: Jimb0 Share Use this URL to share: Share on Twitter Share on Facebook Share on Google+ The XBee Shield gives your Arduino a seamless interface to XBee – one of the most popular wireless platforms around. Part of what makes XBee so popular is its simplicity. Covered In This Tutorial The goal of this tutorial is to set up wireless XBee communication between a computer and an Arduino/XBee Shield combo. We’ll begin by examining the schematics and hardware of the XBee Shield, then move on to example code. Materials Required 1x XBee Shield – The star of this tutorial. Suggested Reading Before reading through this tutorial, we highly recommend checking out the Exploring XBees and XCTU tutorial. In addition to that tutorial, we also recommend checking these guides out:
MaKey MaKey | Buy Direct (Official Site) Arduino Tutorial - Lesson 5 We've done a lot so far, blinking lights, printing messages...all of that stuff is output: signals coming from the Arduino. The next step is to start playing with input, with the Arduino responding to outside events. In this lesson we will begin with the most basic kind of input, a push-button switch! You're probably familiar with switches, there's tons of them in your house. On the left, the switch is open and no current flows. (thanks wikipedia!) In this photo, you can see the internals of a light switch. Light switches are great but we need something smaller. These little switches are a 1/4" on each side, cost about 25 cents, and can plug directly into a breadboard. Normally, the two wires are disconnected (normally open) but when you press the little button on top, they are mechanically connected. To get the buttons to sit better in the protoshield, you may want to straighten out the legs (just squish them with a pair of pliers) so that they look like the button on the left. Fig 5.2
PIR Motion Sensor PIR sensors allow you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason they are commonly found in appliances and gadgets used in homes or businesses. PIRs are basically made of a pyroelectric sensor (which you can see above as the round metal can with a rectangular crystal in the center), which can detect levels of infrared radiation. Along with the pyroelectic sensor is a bunch of supporting circuitry, resistors and capacitors. Our older PIRs looked like this: Our new PIRs have more adjustable settings and have a header installed in the 3-pin ground/out/power pads For many basic projects or products that need to detect when a person has left or entered the area, or has approached, PIR sensors are great. These stats are for the PIR sensor in the Adafruit shop which is very much like the Parallax one . More links!
Internal PCB Trace Width | Electronics and Electrical Engineering Tools | EEWeb Community Calculate the required internal trace width for a specified current Inputs Trace Width Unit Trace Thickness Temperature Rise Trise Additional Inputs Ambient Temperature Tamb Length Output Additional Output Trace Temperature: Resistance: 0.0000157 ohms Voltage Drop: 0.000157 volts Power Dissipation: 0.00157 watts Tool Description Trace width is a requirement that designers specify to ensure that the trace can handle the required current capacity. Max Current Trace Thickness Max Desired Temperature Rise This tool also calculates the following additional valuable information related to the trace: Resistance Votlage Drop Trace Power Dissipation After a user specifies the max current, trace thickness, and desired max temperature rise, the tool calculates the trace width.
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