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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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Test if your RC Carbon Frame is real Carbon with a Multimeter
posted September 16 2014 8:20.31 by Giorgos Lazaridis




It used to be a trend - Young drivers had the car's engine bonnet covered with fake carbon fiber sticker. For what? I suppose because the real WRC[...more]

[Link: Modified RC]
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The 10 Best Kept Business Secrets In The World
posted September 15 2014 17:33.25 by Giorgos Lazaridis




What does Coca Cola, Google and WD40 have all in common? They all have a trade secret to preserve! When someone makes something good, then either he gets[...more]

[Link: Alltime10s]
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Ridiculously simple Clap Toggle Switch [Project]
posted September 15 2014 8:35.22 by Giorgos Lazaridis




This is a circuit for educational purposes. It shows how to make a Clap Toggle Switch using the Arduino board. A basic RC circuit filters the microphone[...more]

[Link: EngineeringShock]
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Become a Space Explorer with this OpenCuriosity Project [Space]
posted September 15 2014 7:50.29 by Giorgos Lazaridis




OpenCuriosity is an open source, exomars rover (1:5 scale) with arduino as main controller, based on the NASA Curiosity rover. It contains a set of Arduino[...more]

[Link: spaceappschallenge.org]
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50W Adjustable Boost Converter Explained [Circuit]
posted September 15 2014 7:40.47 by Giorgos Lazaridis




Here is another excellent video from Afrotechmods. In this video he explains how a typical DC-DC boost converter operates and the uses the LT1370 chip[...more]

[Link: Afrotechmods]
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How to test a PNP and an NPN transistor [Theory]
posted September 15 2014 7:13.06 by Giorgos Lazaridis




Stan Gibilisco compiled a set of videos in which he explains how can someone test a transistor (NPN and PNP) using a simple ohm-meter. Its the standard[...more]
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