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Coder for Raspberry Pi A simple way to make web stuff on Raspberry Pi. Coder is a free, open source project that turns a Raspberry Pi into a simple platform that educators and parents can use to teach the basics of building for the web. New coders can craft small projects in HTML, CSS, and Javascript, right from the web browser. Download Coder 1.33GB | Coder v0.9Now supports Raspberry Pi 2! How to Install and Connect. Download, unzip, and run the Coder Installer. Mac users, just run the provided installer.PC users, check out our Windows-specific Instructions for more installation details. Insert your new Coder SD card into your Pi, make sure your Pi and your computer are plugged into the network, and power it up. The Pi will be your new web server. On your computer, visit in Chrome to connect to your new Coder and start playing. [Note: You will see a warning about Coder's certificate. Download and run the Coder Installer with any 4GB SD Card. Getting to Know Coder. Click on any app to open it up.

Beginner's Electronics: 10 Skills You Need to Know Advertisement Many of us have never even touched a soldering iron – but making things can feel incredibly rewarding. There are some key skills you need when tackling electronics projects – whether you plan on fixing broken devices or assembling Arduinos (our Arduino guide), the right skills make the difference between rage and elation. Here’s a quick run-down of ten of the most basic DIY electronics skills to help you get started: Getting Started With Arduino: A Beginner's Guide Getting Started With Arduino: A Beginner's Guide Arduino is an open-source electronics prototyping platform based on flexible, easy-to use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. Read More Breadboarding A breadboard allows the construction of a circuit, but without soldering. A breadboard allows the input of a DC current using the channels in the left and right sides of the board. Soldering Using a Multimeter

123D Circuits Video - 123D Blog 123D Circuits : Blink LED with an Arduino This week's video on Electronics teaches you how to blink LEDs with an Arduino in the 123D Circuits virtual circuit simulator. Its super-simple because the code is already pre-written and saved into the Arduino. This link will take you to the playlist of all videos So far we've been keeping it simple by getting the main point across in under a few minutes, but if you watch the whole video you'll also learn some engineering science! Click here to open the original circuit in 123D Circuits. 123D Circuits is a fantastic place to go to build electronic circuits without leaving your computer. You can do this yourself, just head over to 123D Circuits and sign in, then create a "New Breadboard Circuit" then follow along with the video. Posted in: 123D Circuits, 123D Circuits Video, UncategorizedTagged as: 123D, arduino, autodesk, browser based, circuits, circuitsio, education, LED, online, Simulation 123D Circuits Video Series : Measure Current

I Make Projects - A Quickstart Tutorial for Starting with AVR Microcontrollers A Quickstart Tutorial for ATMEL AVR Microcontrollers If you're at all like me, you learn best by example and by doing. If that also sounds like you and you're interested in the popular AVR microcontrollers, this tutorial should be right up your alley. The goal is to get you up and running as quickly as possible, so you can get to exploring and modifying on your own without having to fiddle with hardware, software, parts, or settings. If you can program in basic C and are familar with most concepts around microcontrollers (perhaps you've used a Basic Stamp, for example) and basic electronics, you'll be up and running in no time. The software and hardware presented here are suitable for beginners, but also entirely appropriate for more advanced projects. What You Will Get Out Of This Most tutorials skim over a lot of information. You can then get on with learning on your own by exploring and modifying, instead of wasting time figuring out fundamentals or usage of the tools! Overview 1. 2. 3. 4.

How to Turn Your Phone Into a DIY Photo Projector for $1 Slide projectors are great but outdated. And digital projectors cost a bundle. What’s a photographer to do when they’re looking for a bigger picture? We’ll show you how to turn your phone into a photo projector for just $1. Yep, for a buck you can have Instagram on overdrive and Flickr living large. The project is so easy, you might even have time to sneak in a cat video or two. Make a DIY Projector for $1 Why it’s Cool: A phone based projector is a great way to show off your mobile photos and your phone hack savvy. Just picture laying in bed browsing your feed or watching a movie on a ginormous screen. A projector provides a new way of looking at your shots, and for $1, who can afford not to try this project? The Ingredients: ShoeboxPaperclipSmartphoneMagnifying glass (get it for $1 at Dollar Tree), or a large aperture lensX-acto knife or similarElectrical or black duct tape Optional: Matte black spray paint or black paper Step 1: Trace a Hole on the Box Step 2: Cut a Hole in That Box

Shrinkify Your Arduino Projects - Make: Ever since I started making projects with the Arduino, I’ve had a desire to shrink them down to a single, small circuit board. One of my first projects, a customizable SLR intervalometer, was packed in a phonebook-sized cardboard box and used the Arduino Deumilanove connected to a breadboard with jumper wires. I brought the box out to Central Park at 5am to make a timelapse of the sunrise, but when I got to the park, I spent 20 minutes fixing the connections between the Arduino, the breadboard, and the components. Since then, I’ve explored a few different ways of shrinking projects down and making them more robust. I tried to teach myself AVR programming, but ran into a lot of snags along the way. When I came across this tutorial by MIT Media Lab’s High-Low Tech Group, I was elated. I followed the tutorial and found that it was actually rather easy to program these little chips using the Arduino code and IDE. More: Matt Richardson Website

The World Famous Index of Arduino & Freeduino Knowledge How to Use IR LED and Photodiode with Arduino In this post I am going to show you how to use and program IR LED and Photodiode pair with Arduino to detect obstacles in a short range. Before going to do the project let us have a brief look at the IR LED and Photodiode. Photodiode is a light sensitive semi-conductor diode which converts the light energy into voltage or current based on the mode of operation. In general Photodiodes are operated in reverse bias condition. IR LED and Photodiode Project: In this project I am going to show you How to use the IR LED and Photodiode pair to detect the obstacle in-fornt of it. Materials required: 1) Arduino 2) IR LED 3) Piezo buzzer 4) some Wires. Circuit diagram: How circuit works: In the above circuit the Photodiode is operated in Reverse bias condition i.e., the long leg of photodiode goes to ground and the short leg is connected to 5 Volts supply through 3 K ohms resistor. Program : int pd=2; //Photodiode to digital pin 2 How program works: Related posts :

Make a DC motor. Try with several configurations, observe what happens when the polarity of the magnet or the battery is reversed, try with different coils, etc... For example, the coil I made was way too thick, and a lot of current passed though it, it works, but my power supply screamed for mercy, it also had a few amount of turns, so I decided to improve the design. By using a thinner copper wire I gain resistance to avoid too much current flowing through it, I also gain magnetic flux, due the increased number of turns, this will translate into more efficiency. The problem with this coil is the wire is so thin it won't be able to sustain itself, so I took two pieces of the same wire I used to make the other loop and I joined them together by twisting them, by making this I make sure there's no electrical contact between both ends. Now, I poke holes though the coil with a needle and pass the wire though, it takes some bending, but after a while I tie the wire to the coil and align it properly.

Basic Electronic components Motors is a device that converts direct current into mechanical power. They rely on the forces produced by magnetic fields. It does this by having a coil of wire with a current running through it generates an electromagnetic field. The direction and magnitude of the magnetic field produced by the coil can be changed with the direction and magnitude of the current flowing through it. The most common types of motors are DC motors : This Motors simply starts spinning if you give it DC connection the speed and direction all depends on the arrangement of the positive and negative poles as well as the amount of current you put through it. Servo Motors: These motors are awesome because they can turn to any specific location within 660 or 180 depending on the servo you have (to find out more about servos please check my other instructable about servos:

Mini USB Keyboard with a $7 Microcontroller Make a keyboard that uses a microcontroller to send usb keypresses, which interfaces with AutoHotKey, a Windows application for creating applications and macros. AutoHotKey can be used with your original keyboard with no need for an additional keyboard. This supplementary device isn't for everyone, but some of the uses include: simplifying annoying hotkeys to the push of a single buttoncreating special controllers for games / interfacescreating program specific tasks, like using each button to save out a different filetype in an application The AutoHotKey software can assign just about anything to the press of a button: launching applicationsmulti step commands that can be done with the keyboardsimplifying cumbersome shortcutslaunching a specific web urlinserting snippets of text This was just an experiment for me, but I have found it to be useful for many things, so I thought I'd share.

Pressly: The DIY Almighty Smartphone Button Most physical keys have been chased off phones, thanks to the rampant rise of touch-screen technology, but here’s a DIY project that wants to bring a smarter kind of physical key to your smartphone. Pressly is a hardware button connected to a 3.5mm male audio jack that plugs into the headphone jack of your Smartphone or Tablet. It is compatible with both Android and iOS(Jailbreak required) platforms. So, for instance, if you always wanted a shortcut to snap a photo and upload it straight to a social network you could create that function in the app which link to Pressly. Of course there are apps that can do this sort of thing, but the point about Pressly is that it’s a chunk of hardware that sits within easy reach of your fingers — thereby cutting down on the number of actions required to perform the function you’re after. The apps compatible with Pressly will allow a range of shortcuts to be created, based on a combination of short and long presses of the Pressly key.

Converting Decimal To Binary Numbers To understand counting in binary, it is best to understand how decimal works. For each number, every digit refers to a position. In the number 576. The digit 6 is at position 0, the digit 7 is at position 1, and the digit 5 is at position 3. Decimal numbers are also called base 10, because the value for each digit is based on the number 10. Look back on the number 576 to see exactly how this works starting with the digit "6". Example Since base 10 is used when counting in decimal, and 6 happens to be at position 0. For the digit 7, we have 7 multiplied by 10 to the power of 1. Lastly, for the digit 5, we have 5 multiple by 10 to the power of 2. After you have found out the value for each digit at their respective positions, add up all of our results for the final answer. Now obviously you did not have to go through all the extra steps for this number.