Paul Asselin says:
I wanted to know how much time I was spending under the shower each day, especially in these environmentally conscious times. The benefits of that are that I can perhaps save some money on the water bills and also study the effect of temperature on my showering time.
So Paul designed this Arduino shower timer analyzer. He considered using a water flow meter, but opted instead for using an RFID reader and a Real Time Clock (RTC). He waives his RFID card before the reader upon entering the shower which starts the timer. When he leaves the RFID reader again detects the card and stops the time. The duration is then uploaded to the Thingspeak website’s API section via an ethernet shield. [via]
This was Paul’s entry into the Thingspeak contest.
Arduino shower time analyzer – [Link]
dangerousprototypes.com writes: [via]
Nanode is a low cost Arduino-like sensor node board intended for web connectivity applications. It allows you to develop web based sensor and control systems – giving you web access to six analogue sensor lines and six digital I/O lines. The schematic and other details can be found on the project’s Thingiverse page. The code can be found here.
This is an open source project conceived, designed, manufactured and coded by London Hackspace members.
Nanode: networked Arduino node – [Link]
adafruit.com writes: [via]
Converting an Arduino to 3.3V – All official Arduinos run on 5 volts, which for a long time was the ‘standard’ voltage for hobbyist electronics and microcontrollers. But now the coolest new sensors, displays and chips are 3.3V and are not 5V compatible. For example, XBee radios, and SD cards and acellerometers all run on 3.3V logic and power. If you tried to connect to them with 5V you could damage the internals of the accessory. We use chips like the CD4050 to do level conversion but if you are using a lot of 3.3V devices, maybe you’re just better off upgrading the entire Arduino to run from 3.3V! To do that, we will replace the regulator so that the DC barrel jack for a 3.3v type, and then reconfigure the 5V usb power line so it goes through the regulator as well.
Converting an Arduino to 3.3V – [Link]
Getting Started with Arduino (in Praise of Adafruit) @ Continuations. Albert writes – [via]
I am currently reading James Gleick’s “The Information,” which I highly recommend (more on that in a separate post). In it is a wonderful chapter on Babbage and Lady Ada Lovelace, which makes it clear how amazing her insights into what we would call programming were by placing them in their historical context. What does any of this have to do with Arduino? Well, I ordered our Arduino kit from the wonderfully named Adafruit in New York which was founded and is run by Limor Fried.
I can wholeheartedly recommend the entire experience. Ordering off the site is easy and fulfillment was incredibly speedy. The basic Arduino Experimentation Kit contains everything you need to get going and do so without any need for soldering. It comes with a simple plexiglass platform on which you mount the Arduino board with a couple of screws and next to it a breadboard which has an adhesive backing. All of this is accomplished in minutes. The instructions that come along are clear and easy to follow. The cut-out wiring diagrams are in color and fit the bread board perfectly.
Getting Started with Arduino – [Link]
Mike Chambers writes:
Here is how it works. I have an Arduino Duemilanove with ATMega328 which has two photo-resistors connected (with a 10k pull down resistor). I set up two laser pointers to shine a laser directly onto the photo-resistor (which is enclosed within a dark box). The Arduino monitors the values returned from the light sensor, and watches for any changes that indicate that the laser bean has been broken. When both laser beams are broken, the Arduino calculates the amount of time between when each sensor was tripped. It then sends that value to the Adobe AIR based client, which is connected to the Arduino via USB / Serial port and a serial port proxy (in the case, TinkerProxy).
Arduino based speed detector with a Flash! – [Link]
Tokyo Hackerspace has developed a Geiger shield for Arduino, designed to work with the RDTN/Pachube radiation detector project. Akiba writes: [via]
This is an Arduino-based geiger counter shield that makes it easy to upload data to the internet and also interchange tubes. Since it’s open source and Arduino-based, its also easy to hack this to other interesting applications.
Tokyo Hackerspace Geiger Shield for Arduino – [Link]
Detect Alpha, Beta and Gamma radiation integrating any Geiger Tube and read this levels using Arduino. As well as from the terminal, the radiation levels can be shown using different actuators.
In order to improve the design along with the software application participation in the Forum is appreciated.
Radiation Sensor Board for Arduino – [Link]
JeeLabs has a product known as the JeeNode v5, which is essentially a miniature Arduino (Atmega328p) board with an onboard RFM12B wireless module. Boards are available with the serial interface (shown above) as well as USB.
While it’s not an Xbee compatible RF unit, the RFM12B has its own RF12 library of functions which should help you accomplish many control and data transfer tasks.
JeeLabs JeeNode combines Arduino, RF – [Link]
Yes, this is more or less your average touchpad that one can find from inside a laptop. This model, like majority of touchpads out there operates with PS/2 standard. This means that it can be directly plugged in to a PS/2 connector and with proper drivers, function as a mouse.
As it happens the PS/2 communication is not that difficult to achieve with an Arduino board. Kristopher has written an Arduino/Wiring library that offers all the functionality that we need at this point.
Arduino + Laptop Touchpad – [Link]