Over the last few videos I have highlighted helpful circuits. In this video, I highlight an active filter setup utilizing an operational amplifier. Filters are very helpful when working with analog signals. Often the range of frequencies needed are not across the entire band, therefore you need to filter out those that inhibit a clean […]
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Some of the folks over at Teague Labs have been noodling around with measuring water consumption. They’ve built a graphing water meter using a YellowJacket Arduino board with built-in WiFi and coolant flow meter from a PC cooling system to see how they used water around the office. Water conservation is major concern in many areas around the world. Tools that allow us to observe and correct our behaviors help us towards a path to sustainability. Schematics and source code are available if you want to try it out for yourself.
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Here’s a great example of what makes the Arduino platform so great. In need of a basic frequency counter on the quick, I dug up some code & schematics based on the ATTiny2313. But just before breaking out my programmer + protoboard, I thought to have a look Arduino.cc in case someone had written similar […]
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Antique voltmeter displays current air quality from the web – By Tom Igoe… One thing that disappoints me about computers is how little character they possess. Antique instruments of information display, like Victorian pendulum clocks, barometers, and compasses, and Babbage’s calculating engines, have a presence that modern computers lack. I dig the look of the […]
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Makers of the Enerjar have posted build instructions to their site. Head on over to start building one of these handy power consumption meters. – Link Enerjar, Greener Gadgets Design winner on Core77.com – Link Related: Greener gadgets design competition results – Link
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