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PIR Powered Alarm with Arduino [Project]


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[...]

Driving a 16x8 LED Matrix Interface with Arduino Mega [Project]


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[...]

CRAZY Dancing Disco Lights made simple [Project]


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[...]

Test if your RC Carbon Frame is real Carbon with a Multimeter


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[...]

The 10 Best Kept Business Secrets In The World


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[...]

Ridiculously simple Clap Toggle Switch [Project]


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[...]

Become a Space Explorer with this OpenCuriosity Project [Space]


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[...]

50W Adjustable Boost Converter Explained [Circuit]


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[...]

How to test a PNP and an NPN transistor [Theory]


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[...]

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