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What’s the password? Arduino + Keypad. KeypadTutorial. Matrix Keypad library This page last updated September 04, 2013, at 11:42 AM by gratefulfrog.

KeypadTutorial

Yet another laser cutter. When my EPSON 830U decided not to work for me anymore (printing heads clogged) I thought I could make some use of the still working mechanics of the printer.

Yet another laser cutter

0. Motivation When I bought such a motor control shield recently, it came as a kit without any instructions.

0

I could find the circuit diagram and list of parts on the Internet after some searching, but almost nothing on assembly and how to control it. Therefore I decided to create this page to share with the community what I learned so far. Adafruit Learning System. Difficulty: Difficult. My older son recently started school and needed his own desk for doing homework.

Difficulty: Difficult

I wanted to make something nicer than a simple tabletop with legs, and realized that I could also build in a bit of fun for when the homework is finished. Both my boys and I still had space travel on our minds from our summer trip to Kennedy Space Center. For this desk project, I decided to go with a NASA theme. I researched the Apollo Program as well as NASA's Mission Control Center, and designed my own console roughly based on those. I say "roughly" because the actual Mission Control does more monitoring than controlling, and isn't awash in the whiz-bang rocket noises young kids appreciate. The desk resides under my son's loft bed (which I also built), and stays closed until the homework is finished: When playtime begins, the lid flips up to reveal the Mission Control console: As I mentioned in the video, I painted the underside of the lid with magnetic primer.

Difficulty: Moderate. My older son recently started school and needed his own desk for doing homework.

Difficulty: Moderate

Difficulty: Easy. My older son recently started school and needed his own desk for doing homework.

Difficulty: Easy

I wanted to make something nicer than a simple tabletop with legs, and realized that I could also build in a bit of fun for when the homework is finished. Both my boys and I still had space travel on our minds from our summer trip to Kennedy Space Center. For this desk project, I decided to go with a NASA theme. I researched the Apollo Program as well as NASA's Mission Control Center, and designed my own console roughly based on those. I say "roughly" because the actual Mission Control does more monitoring than controlling, and isn't awash in the whiz-bang rocket noises young kids appreciate. Difficulty: Easy. Control a Servo with a Force-Sensitive Resistor. Aquaponics – Online Temperature and Humidity. This project is a part of the Arduino Data Acquisition and Control System described in the upcoming book Automating Aquaponics with Arduino.

Aquaponics – Online Temperature and Humidity

You can see a live version of this tutorial here: While this project is designed with aquaponics in mind, it does not require an aquaponic system, making it useful for other projects such as home automation. The included application is, therefore, bare-bones, making it easier to integrate into any other App Engine project. How It Works Every sixty seconds, the Arduino will test its connection to App Engine. On startup, the web browser (client) will create a temperature and humidity gauge with values at zero. Aquaponics – Online Temperature and Humidity. RGB Liquid Crystal Display Tutorial. Step #2: PrevNext Now we will prepare everything to start connecting to the Arduino.

RGB Liquid Crystal Display Tutorial

Insert the display into the breadboard with the pot next to it. Then connect 5V and GND to the breadboard rails as I have done. Good. Charlieplexing LEDs with an AVR ATmega328 (or Arduino) Charlieplexing is an ingenius method for controlling many LEDs without using many microcontroller pins.

Charlieplexing LEDs with an AVR ATmega328 (or Arduino)

You can turn on or off one LED at a time. To light more than one LED at a time, you can scan the LEDs by turning a sequence of them on and off really fast. The number of LEDs you can control is determined by this formula: N pins * (N pins – 1). Secret-Knock Gumball Machine. One of the best things about exhibiting at Maker Faire is giving attendees a challenge.

Secret-Knock Gumball Machine

For the 2010 Maker Faire Bay Area, I decided to combine a past project of mine, a door lock that opens only when you give a secret knock, with a standard crowd pleaser: candy. The result was this Secret-Knock Gumball Machine, which tempted and tested the crowds at Maker Faire to guess the right rhythm and receive a treat. Since the knock was not terribly secret (I happily handed out hints), it distributed hundreds of gumballs over the event’s two days. The “secret” knock defaults to the famous “Shave and a Haircut” rhythm, but you can program custom knocks by simply pressing a button and knocking a new pattern.

The machine only listens for the rhythm, not the tempo, so the correct knock will dispense a treat whether you perform it fast or slow. Downloadable files. Arduino Parts & Kits Online Melbourne, Buy Microcontroller Boards, Arduino Electronic Components - Welcome. Arduino Projects. Arduino projects. Practical Arduino: News. Top 40 Arduino Projects of the Web. Arduino - HomePage. Arduino - HomePage. Arduino - HomePage. Arduino. Arduino door lock. The World Famous Index of Arduino & Freeduino Knowledge.

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Computer science has brought the world smart phones, GPS systems, the gaming industry and tablet computing, along with technological developments that assist government, industry and medicine. In addition to creating new technology, computer scientists also make improvements to existing technology and study the ways computers can make our lives easier. One can learn more about this field of study through several online computer science courses. As with any branch of science, computer scientists perform research that establishes new information.

This research begins with known mathematical algorithms and computer theory, and strives to constantly redefine what technology can do for us. Most computer scientists work on a theoretical level, using technology to study technology. During the first two years of a standard 4-year program, students focus on the basics: Country Mapping. HighWire Free Online Full-text Articles. Free Online Course Materials. Free Online Classes. Classroom. A complete list of Massive Open Online Courses (free online courses) offered by the best universities and entities. Education: Free Teaching Resources, Tools. Education: Free Teaching Resources, Tools. Free Video Lectures, Online Courses and tutorials from top colleges, universities.

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