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Send Text Message with Smartphone to Arduino [Project]
posted September 17 2014 18:08.28 by Giorgos Lazaridis




Its called Bluetooth and there is already a small and cheap module which can be interfaced with a microcontroller (and Arduino of course) and control your[...more]

[Link: electroingenio]
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Simple BFO Metal Detector on the Scoop [Project]
posted September 17 2014 17:41.58 by Giorgos Lazaridis




This project is a remake of this older article. BFO stands for Beat Frequency Oscillator. The theory of operation is well described in the site:[...more]

[Link: Thomas Kim]
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Eyeball Animation is Freaky! [Project]
posted September 17 2014 14:58.46 by Giorgos Lazaridis




I could not find any info on this project other than that it uses an Arduino and two SG90 servos. The point is that you can watch the video and get a very[...more]

[Link: Nigel Thompson]
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Explaining the Heisenberg Uncertainty [Science]
posted September 17 2014 14:58.39 by Giorgos Lazaridis




The Heisenberg Uncertainty Principle states that you can never simultaneously know the exact position and the exact speed of an object. There is actually[...more]

[Link: Chad Orzel]
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Hacking a Thermostat to get Remote Temperature Readings [Hack]
posted September 17 2014 14:53.32 by Giorgos Lazaridis




Alan from Hacked Gadgets has this thermostat that works fine, but it has a problem - He want to read a remote temperature but this thermostat has the temperature[...more]

[Link: Hacked Gadgets]
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Explaining how an OP-Amp Low-Pass Filter works [Theory]
posted September 17 2014 14:48.41 by Giorgos Lazaridis




Here is a very good explanation on how the OP-Amp low-pass filter works. Stan Gibilisco starts with a non-inverting amplifier OP-Amp circuit and then adds[...more]

[Link: Stan Gibilisco Stan Gibilisco]
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PIR Powered Alarm with Arduino [Project]
posted September 16 2014 19:46.08 by Giorgos Lazaridis




A PIR sensor (Passive Infrared) is a device that can detect slight changes in the Infrared light spectrum. Its very widely used in alarm systems. The idea[...more]

[Link: Plexus CV]
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Driving a 16x8 LED Matrix Interface with Arduino Mega [Project]
posted September 16 2014 8:42.51 by Giorgos Lazaridis




This is a step-by-step 13-pages tutorial with schematics and code for the Arduino Mega, explaining how can one interface two 8x8 LED matrices to the Arduino[...more]

[Link: learnerswings]
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CRAZY Dancing Disco Lights made simple [Project]
posted September 16 2014 8:30.05 by Giorgos Lazaridis




This is what happens when a practical mind powers an artistic mind. MrRobertpn got the idea (as well as the code and the circuit) form Liz Clark at Radical[...more]
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