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DIY Home AC power logger
posted December 13 2010 6:10.16 by Giorgos Lazaridis

Here is a DIY home power usage logger, based on the AVR ATmega168 microcontroller. The output is displayed on a graphical LCD display as a bar graph. The power is calculated with the P=V*I formula. To get the current (I), he used 3 flyback coils from old TVs he had (has 3-phase power). Each coils generates a voltage according to the current of the line that is attached to. A 0.2 ohms current sense resistor allows him to measure the current. To have more accurate readings, he amplifies this current in 3 stages (X1, X10, X100) and uses the best fit gain. Data are then stored in an SD card. Read more info in his page.

[Link: stahlke]
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Tags: electronic project   diy   microcontroller   sensors   avr   

Meet SEGFAULT: the 2-wheels self-balancing vehicle
posted December 13 2010 5:35.43 by Giorgos Lazaridis

Charles made the SEGFAULT, a Segway type vehicle. His goal was to make a ridable self-balancing 2-wheeled vehicle, whose controller is implemented...

[Link: equals zero]
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Tags: electronic project   physics   accelerometer   research   sensors   

High speed photography take with Arduino
posted November 26 2010 11:12.59 by Giorgos Lazaridis

The basic idea behind high speed photography, as matt richardson explains, is as follows: In a completely dark room, the camera is set to fully manual with the shutter always open...

[Via: Make]    [Link: Matt Richardson]
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Tags: electronic project   diy   microcontroller   arduino   sensors   artistic   mods   

Serial interface multichannel thermometer
posted November 25 2010 19:00.13 by Giorgos Lazaridis

Scout made this simple multichannel thermometer using an ATMega48. For temperature sensor, he chose the good old LM335 precision temperature...

[Link: swharden]
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Tags: avr   microcontroller   electronic project   diy   sensors   

The Trebuchet of the 21st century
posted November 21 2010 7:51.49 by Giorgos Lazaridis

People usually design minigun-like paintball guns mounted on automatic targeting systems or other sci-fi weapons. This guy over here went a step... back! He designed a trebuchet...

[Link: profkk]
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Tags: physics   mechanical   sensors   ultrasonic   

How to reveal microwaves in an oven
posted November 21 2010 7:26.02 by Giorgos Lazaridis

Have you ever wonder how the microwave patterns are inside your microwave oven? Marc Kossover from Hands On Science found a simple and relatively cheap way to reveal...

[Via: Make]    [Link: Hands On Science]
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Tags: tester   experiments   sensors   

The Minotaurus project got more senses
posted November 20 2010 7:42.26 by Giorgos Lazaridis

Maybe you remember an older post about Minotaurus, a project which is developed in Computer Science and Engineering Laboratory (CSE) in University of Oulu, Finland...

[Link: CSE Oulu]
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Tags: experiments   sensors   research   electronic project   

DIY Voltmeter to thermometer mod
posted November 19 2010 13:48.20 by Giorgos Lazaridis

amer2484 uploaded a first video from the project he is working on. He built a digital voltmeter using the ICL7107...

[Link: electronics-diy]
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Tags: electronic project   diy   7-seg led   mods   sensors   

An Arduino Ultrasonic happy-bot
posted November 17 2010 5:39.37 by Giorgos Lazaridis

This is the first Arduino bot ever built from geekionizado and was recently posted in LMR. This bot with the happy face, can detect obstacles...

[Link: LMR]
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Tags: robot   rc servo   microcontroller   arduino   sensors   ultrasonic   

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