eclectica has posted a circuit for a PICAXE-enabled raincounter. The device employs a 1mm/pulse rain gauge to measure rainfall. Pulses from the gauge’s internal reed switch are read by the PICAXE-08 MCU, which in turn stores the running count in … Read more
This webcast by Greg Borenstein presented by O’Reilly offers a solid introduction to building your own applications with the Microsoft Kinect. Beginners will find a wealth of information about the Kinect’s theory of operation and how to use the data … Read more
William Finucane of revoltlab posted this easy lie detector project on the Mad Science website. The hardware consists of nothing more than an Arduino, a 10K resistor, wire and some tin foil. (You didn’t use ALL your foil for your … Read more
Here’s a novel application. Supecapacitor has developed a circuit simulation project using Arduino-Processing. As he describes it: “SuperScope is a circuit simulator app for representing and calculating analog circuits. What’s so cool about SuperScope is the ability to actually import … Read more
Ben Eishen sent in this link. He says, “I have been thinking about building an ESR meter, and this one looks like a winner.” The design is based on the ATMega88 and according to the designer, Dr. Le Hung, “The … Read more
The folks over at MAKE have a pulse sensor which attaches to your fingertip or earlobe and measures minute changes in light from expansion of the capillary blood vessels to sense your heartbeat. Technical information is available here, including design … Read more
With the recent increase in solar storm activity, Alexander Avtanski bring our attention to his DIY magnetometer project. The activity of the Sun varies on a cycle with a period of approximately 11 years. Periods of low solar activity are … Read more
Olimex has posted this project for measuring temperature in range -55+150C for a solar water heater system. It uses the KTY81/110, a low cost PTC thermistor from NXP. The MCU board is the Duinomite we features in a previous post. … Read more
Philip Peter has made a somewhat unconventional use of the Open Bench Logic Sniffer. Recently we suspected that one motor of our hexacopter had been damaged in a crash. Since removing the motor requires almost the complete disassembly of the … Read more
Andrianakis Haris writes: This is a thermometer I designed for my room, built in a small pack and easy to control. Some basic components used: Atmega8, LM35 for inside temp sensing and DHT-11 for outside temp & humidity sensing. The … Read more
Raj writes to inform us of his Embedded Lab tutorial with tips on using the Fixed Voltage Reference (FVR) module in enhanced mid-range 8-bit PIC microcontrollers for a precise and accurate A/D conversion. Raj demos how to use the built-in … Read more
A spirit level is an “an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb).” Here’s a demo by Shawon Shahryiar of an electronic spirit level made using a Microchip PIC16F684, a SCA610 accelerometer and a … Read more
The Hoz sent in a link to this Instructables by alinke detailing the build of a talking breathalyzer. The main components are a Seeeduino and the Seeed Music Shield, Twig Alcohol Sensor, and Twig Serial LCD all available from Seeedstudio. … Read more
Parallax has introduced the Laser Range Finder. “Designed in conjunction with Grand Idea Studio, the Parallax Laser Range Finder (LRF) Module is a distance-measuring instrument that uses laser technology to calculate the distance to a targeted object. The design uses … Read more
Anna Dumitriu, Tom Keene and Alex May recently gave a presentation at 17th International Symposium on Electronic Art in Istanbul demonstrating how to build an Arduino to iPhone/Android interface with GSR sensor. A GSR sensor connects to an Arduino board. … Read more
A potentiostat is an electronic instrument that controls the voltage difference between a Working Electrode and a Reference Electrode contained in an electrochemical cell. Control is achieved by injecting current into the cell through an Auxiliary, or Counter, electrode. Commercial … Read more
Kerry writes: I have just completed a project for accurate milliohm range resistance measurements. The details are on my blog . I’d love to share this with your readers. To effectively measure small resistance values in the milliohm range, we … Read more
Having to remember to take a vitamin or medication periodically can easily result in missed doses. If it’s a vitamin, probably no big deal. But if its a medical maintenance drug a missed dose can have serious consequences. Ryan Blace … Read more
Antipasto Hardware posts this cool project demonstrating how to use an Arduino and a TouchShield to keep track of shot patterns while at the range. This is a quick video showing off the Arduino Liquidware TouchShield Slide, and Bjorn Entperprises … Read more
Here’s an example of PyroFer’s DIY workaround to a problem: So, after Google killed the Google PowerMeter api I got the incentive to finish my own project using it. Odd huh. I wrote loads of code to hook into the … Read more
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