August 15th, 2009

Pong on blue matrix + arduino

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Bruno dropped an email to let us know about his project, a pong game controlled by an arduino and displayed on a 88 blue dot matrix.

July 27th, 2009

Arduino LCD Backpack

Arduino LCD Backpack

Also entitled Arduino LCD Backpack ‘Sandwich’ by its illustrious creator, this is a simple do-it-yourself project using an Arduino microcontroller and a small LCD display. The MCU runs at 16Mhz thanks to the ceramic resonator (the light-brown one, located near the microcontroller). The LCD is an alphanumeric one with two lines of 16 characters (the color used is amber/orange, which gives it a nice, old-school feeling). The contrast of the LCD can be adjusted using a potentiometer.

The Backpack has an IR input receiver module connected (the small silver box on the left side) and a 6 pin FTDI style serial header soldered directly to the wires, which is used for software download and also for the 5V DC power supply. The project is free, for non-commercial use only. More details, pictures and source code available in the link below.

Arduino LCD Backpack: [Link][via]

alphanumeric LCD, with two lines of 16 characteralphanumeric LCD, with two lines of 16 characters.s.
July 25th, 2009

Silent Ceiling POV Display

Silent Ceiling POV Display

A persistence of vision (POV) display is a device that creates an apparently still image using rotating LEDs with great speed. The human eye is not able to distinguish every image individually, so the picture formed appears as a solid image. The POV phenomenon is not a new discovery and a lot of POV display projects have been made. However, this one right here has two different attributes that differentiate it from other POV displays: it is located on a fan placed on a ceiling and it’s silent.

This project uses a fan with 5 propeller blades and every blade has 32 LEDs mounted on it (that means a total of 160). These LEDs are connected to an Atmel microcontroller on an Arduino board. The POV display also uses 74HC595 8-bit serial-in, parallel-out shift registers that convert serial-in data into parallel-out data. The microcontroller generates the sequence in which the LEDs are lit, thus creating the image.

The location of the display makes it pretty cool and the fact that it’s attached to this kind of fan makes the whole device completely silent, which is quite different from most POV displays out there that are rather noisy. Having a thing like this blinking in your living room might seem like a good idea if you want to impress a guest audience, but other than that I can’t find a reason for actually using it.

Silent Ceiling POV Display: [Link]


Bricogeek droped me an email to let me know they’re hosting a contest where participants are requiered to design a game with an Arduino board. You can use any version of the boards available but it must be playable so the user can interact with the game. You can submit your project, one per person, before the deadline shown on this page. There are some nice prizes waiting for you to win them so I suggest you start building :). Good luck.

July 14th, 2009

Arduino Nano 3.0

Arduino Nano 3.0

The Arduino Nano 3.0 is an Arduino-based electronics board that is designed to be mounted on a breadboard and can be accessed using the integrated USB port. This new version of the Nano features the Atmel ATmega328 microcontroller, which has more RAM and flash memory than its predecessor (ATmega168) and costs $35, cheaper than the previous model too.

The new Arduino Nano, like its forerunner, works at 5V, having limits of input voltage between 6 and 12V, 14 digital I/O pins with 6 of them being able to provide PWM output, 8 analog input pins and a clock speed of 16MHz. It also features automatic reset during program download, auto sensing/switching power input and standard 0.1” spacing DIP for easy breadboard installation. However, this new version possesses double amounts of memory: 32KB of flash memory (2KB are used for the bootloader), 2KB SRAM memory and 1KB EEPROM memory.

The PCB of the Nano 3.0 is a two-layer model, which makes it cheaper to produce and easier to hack. The blue power LED has been moved to the top side of the board and the pin labels have been rearranged. The Arduino Nano 3.0 is manufactured by Gravitech and it costs $30 if pre-ordered from them. The new models will ship on July 27th.

Arduino Nano 3.0: [Link][via]

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