Blog Archives
Posted on 12 Feb 2008
Here is an Arduino controlled Charliplexed LED heart just in time for Valentine’s Day. It uses a total of 6 wires to controll the 27 LEDs. A PIC or AVR could easily be used for this, but the designer have Arduinos lying around and they are easy to program.[more]
Posted on 22 Jan 2008
In this article David play around the code Michael Smith created for a PWM based DAC. David modified his code so that other DAC options could be tried. David compare the 8-Bit PWM DAC with the R2R DAC at various numbers of bits. You might be surprised at how well a 4-bit DAC sounds. This article includes several sound samples for the various DAC options and demonstrates some software abstraction that allows for multiple DAC options.[more]
Posted on 22 Jan 2008
Burn this code to your Arduino. Connect a LED light to pin 12 and ground it. Connect your Arduino to your web server through USB. Log in to your web server and type: “sudo chmod 666 /dev/ttyUSB0″. Add this PHP code to your website header. Enjoy![more]
Posted on 22 Jan 2008
This is really nice Arduino based theremin-like musical instrument.He use Parallax PING sonar sensor.Here are some informations about how to made it. You can see all the documents and pictures here
Posted on 17 Jan 2008
The concept of this project is to design a light that mimics a color if shown to it and design lamp driver. LEDs are very efficient as they only emit one frequency of light, and because of this the light produced could be perceived as flat and lifeless. Instead i used tungsten bulbs because unlike LEDs they aren’t flat and lifeless. Because the Arduino cannot provide enough current to power a tungsten bulb without damaging the Arduino chip, I had to use transistors to turn a separate power source on to power the bulbs. This also meant that the lamp wouldn’t draw too much current from the laptop. 
To do this i connected the pwm pins to base of the transistors, and grounded the transistors to the Arduino’s ground in series with diodes to prevent current flowing back through the tungsten bulbs from the Arduino. Because i used the pwm pins i could dim the bulbs the same way one can dim LEDs in the Arduino code.colour sensor. Because I wanted the lamp to detect colors and mimic them, I prototyped a simple color sensor.[more]
