Agy used for the first time Lilypad Arduino and LEDs on a textile project called Blinky Bike Bag, combining her expertise in fabric hacking with electronics:
The bike bag is made from umbrella material to make it waterproof, and I made it with safety features using the Lilypad light sensor and LEDs. My husband always forgets his reflectors but with the bikebag always being on the bike, he’ll have no excuse not to be a safe cyclist! (more…)
On his blog, Miguel presents one of his latest projects:
This project shows the operation of an RGB lamp using a digital LED strip. After activating the bluetooth connection, the user can open the GUI on the PC to control the lamp. The program shows a hue palette divided into 30 rods, one for each LED of the strip.
By clicking & dragging the mouse cursor it is possible to make your own patterns,. To remove a color, the user can simply click on a rod while pressing the spacebar, which switches off the selected LED.
Part list: wooden support, RGB digitally-addressable LED strip, microcontroller (Arduino Pro Mini, for example), Bluetooth or USB wire.
More information on this project can be found on Miguel’s blog, while a brief video about its operation can be found here; the code of the project can be found on Github. The project’s page on Thingiverse can be found here.
Chris, from PyroElectro.com, proposes a comprehensive tutorial on how to make a simple, yet effective, Arduino-based tachometer.
The circuit is very simple: an IR led is coupled with an IR phototransistor to detect possible interruptions of the light beam, while the Arduino is responsible to calculate the time interval between two such events. Finally, a LCD is used to display the current RPM to the user.
To validate his project, a typical computer fan has been used in the set-up and the outcomes have demonstrated to be very close to the true RPM value (2600 +/- 100 RPMs).
The bill of materials, as well as the schematic, the source code and a detailed tutorial on how to build the circuit is available here.
Loccioni Group, is an italian company that sponsors every year a project internship entitled “Classe Virtuale”, dedicated to young students coming from local technical schools.
This year, “Classe Virtuale 2012″ has been composed by 27 students with different backgrounds, selected among 120 candidates. After a stating training period, during the three-weeks internship the team worked on a very nice Arduino-based project: Flow Meter.
Here you may find a brief interview we had with Daniele Caschera, one of the components of “Classe Virtuale 2012″, about Flow Meter and on how Arduino helped in its design.
PLOTS guys propose an interesting way to measure the quality of the air for indoor environments, by hacking a second-hand Roomba robot (an autonomous vacuum cleaner).
These robots are programmed to randomly move inside rooms to clean up the floor, so by adding a simple air quality sensor on top of one of them, it is possible to easily implement a sort of “random walker” that will sense for us the presence of gases (volatile organic chemicals, VOCs), such as NH3, alcohol, CO2 and so forth.
To keep track of the air quality measurements, the authors equipped the so hacked Roomba with an RGB led, whose color can be changed according to the air sample. By taking a long exposure picture of the room where the robot was roaming in, they could determine the areas where a high concentration of VOCs was present.
The complete description of the project can be found on the PLOTS’ website, while here you may find a short video about it:
PLOTS guys are also working on a different approach to air sensing, which does not make use of a Roomba robot but uses a hamster ball, instead. Further details can be found here.
Brian Schiffer and Sima Mitra, from Cornell University, propose a very nice wristwatch that allows you to keep track of your time perception, using a method known as duration production: TicTocTrac.
Human perception of time is typically distorted, due to the different amount of information and experiences acquired everyday. TicTocTrac lets you to estimate your own perception, first by signaling the perceived duration of a given event and, then, by comparing it with the actual event duration. Finally, all the information can easily be saved to a micro SD card.
The hardware is based on a Atmega32u4, a DS3234S real-time clock and several leds to display time, while the software part is mostly based on Arduino’s DS3234S RTC library.
Like with many projects similar to this, an Arduino board controls pretty much everything. The floor is dominated by powerful LED lights, which respond to a Serial Peripheral Interface (SPI). A small computer is also inside (complete with Wi-fi), along with a car radio hooked up to speakers. Oh, and thanks to additional wheelchair motors, the floor can be wheeled away to wherever it’s needed.
Chris managed to build the dance floor in just one month, and documented how to do it on Instructables for anyone who wants to make their own. And now you’ve seen this, would you really want to throw a party without one?