Arduino Hacks

3080 Articles

AirPiano: Touch Free IR Piano

June 27, 2008 by 6 Comments

[youtube=http://www.youtube.com/watch?v=Gh4Ovsh2DZY&hl=en&rel=0&color1=0x3a3a3a&color2=0x999999]
We were excited to learn of [Omer Yosha]’s AirPiano, but being the persnickety nerds we are, we think its more like a theremin than a piano. The device lets users play 24 different notes with a wave of the hand over the AirPiano. The “keys” are arranged in a matrix of three tiers with eight notes per tier; if the user sustains his or her hand over the AirPiano, the corresponding note is sustained.

It’s construction is relatively simple: an Arduino, several infrared sensors, and LEDs corresponding to the notes make up the device. It doesn’t have any built-in audio hardware at all, so it’s most basic use is as a MIDI controller. Still, it is essentially an unspecified input device, so it could theoretically be used for other purposes. For us, it’s fun to just watch the AirPiano in action.

DuinoStamp

June 27, 2008 by 4 Comments


We think that in honor of the DuinoStamp’s small size and big power, the post about it should also be small and powerful. About the size of 34-pin DIP, the DuinoStamp is a breakout board that fits in DIP sockets and is Arduino compatible. It features an ATmega 168-20PU chip, a 16MHz resonator, decoupling capacitors and more. It doesn’t come with the necessary 5V power supply or any kind of interface cable, but what do you expect for under $10?

Arduino Environment On ATmega644

June 26, 2008 by 3 Comments

Our friend [Zach Hoeken] at NYC Resistor is porting the Arduino environment to an ATmega644 chip. This doesn’t really add new functionality to the ATmega644 as it is already fully programmable, but it does add a user-friendly and familiar environment to the ATmega, allowing users to build their Arduino-based projects with more powerful hardware. The ATmega is, after all, the biggest DIP package AVR makes, featuring 64k flash and 4k RAM (both four times as much as an Arduino) and 32 I/O pins, which is 12 more than an Arduino. The video is only proof of concept, so we will let you know when [Zach] releases more details.

[via NYC Resistor]

Twittering Teddy Bear

June 16, 2008 by 4 Comments

This may be the deathblow that kills Nabaztag: using text-to-speech software, this animatronic bear speaks a Twitter stream aloud and in real time.

The gurus at My Home 2.0 made the bear talk by replacing its integrated circuit board with an Arduino loaded with custom software. A Bluetooth audio adapter was added as a channel for the bear’s voice, and a circuit with an H bridge chip was added to address power issues. The Arduino translates the income audio signal into movement. From there the process moved to the computer that feeds the bear audio data, they parse the Twitter stream and use OSX’s built in “say” command to generate the voice stream that’s sent to the bear via Bluetooth.

Giant Fabric Keyboard

May 28, 2008 by 10 Comments


[ladyada] pointed us in the direction of this giant fabric keyboard built by [Maurin Donneaud]. The construction of it looks fairly simple, like the buttons used in [fbz]’s WiFi detecting backpack strap, but on a larger scale. We’ll take you through its construction, pictures and all, after the break.

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Twittering From The Command Line

May 22, 2008 by 9 Comments
Twitter users often have trouble explaining just exactly what the service is for. The site specifically asks “What are you doing right now?” A simple interface and multiple ways to update means people have started hooking it to different real world objects… objects that aren’t reporting what they had for lunch. After the break, we’ll cover a couple devices that have interfaced Twitter to the real world and how you can update from your command line.

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Arduino Beer Brewing

April 29, 2008 by 13 Comments


[Yuri] spent some time building a computer controlled, arduino interfaced beer brewing rig. A cooler serves as a mash tun, while the arduino controls a steam source that’s used to raise the temperature of the mash as desired. A java app talks to the arduino to set the temperature parameters and monitor the steam boiler. You can catch a nice video walkthrough of the setup, see some screen shots of his java interface.