Famous Circuits Blog

Circuit Project Electronic www.eleccircuit.com

Posted: 29 Jan 2013 11:34 PM PST

This circuit can prevent a car theft. By the delaying them, not to steal our cars easily. Which can use in both cars and motorcycles, that uses a battery 12 volts and also cheaper too. The working principle. In Figure 1 is the Car burglar system with start delay. When we apply a voltage supply on first time, the capacitor C2-22uF will delay time the circuit not work immediately. Then C2 is discharged with a resistors R2-50K. Figure 1 The complete circuit of Car Burglar system with start delay Once through this period. The circuit will checking a undulation of voltage. By have a potentiometer VR1-100K is adjusted a sensitivity. When the car starts to cause ripple voltage. The undulate will be the C1 coupling a signal go to pin 13 of IC1/1, by passed way the VR1 and R4 IC1/1(LM324) is used to amplify the voltage out away pin [...]

IEEE Spectrum

Plugging In to Plant Roots
Opportunity Rover Begins Tenth (!) Year On Mars
How Bad Is Africa’s Internet?
iCandy: A Better View
IT Hiccups of the Week: AT&T U-verse Bundle Suffers Three Day Hiccup
Engineers of the New Millennium: Life in 2030
Engineering Textiles to Keep Us Healthier and Happier
How Will Humans and Robots Coexist?
Self-driving Cars Heading Our Way
Danish Island Tests Smart Grid
Solar Power From Space
The Impact of the Invisible

Plugging In to Plant Roots

Posted: 29 Jan 2013 08:00 AM PST

Marsh grasses can power small fuel cells

Opportunity Rover Begins Tenth (!) Year On Mars

Posted: 29 Jan 2013 07:42 AM PST

Nine years and no maintenance later, Opportunity is still doing science on Mars

How Bad Is Africa’s Internet?

Posted: 29 Jan 2013 07:29 AM PST

A decadelong quest aims to pinpoint the Internet bottlenecks holding Africa back

iCandy: A Better View

Posted: 28 Jan 2013 10:58 AM PST

A panoramic vision system, an eye tracker, and a 3-D model of a fetus

IT Hiccups of the Week: AT&T U-verse Bundle Suffers Three Day Hiccup

Posted: 28 Jan 2013 10:44 AM PST

New York cabbies lose connecttivity; BAT errors revised downward

Engineers of the New Millennium: Life in 2030

Posted: 27 Jan 2013 09:52 PM PST

A one-hour special from IEEE Spectrum Radio and the National Science Foundation

Engineering Textiles to Keep Us Healthier and Happier

Posted: 25 Jan 2013 11:13 AM PST

Using new technologies, researchers are creating smart fabrics that could protect us from disease and make our lives better

How Will Humans and Robots Coexist?

Posted: 25 Jan 2013 11:13 AM PST

Robots will be everywhere in 2030, but not necessarily as humanoid domestic help

Self-driving Cars Heading Our Way

Posted: 25 Jan 2013 11:12 AM PST

Smart vehicles could make the roads safer and ease congestion.

Danish Island Tests Smart Grid

Posted: 25 Jan 2013 11:12 AM PST

In a key step toward going fossil fuel-free, Bornholm is building the power grid of the future.

Solar Power From Space

Posted: 25 Jan 2013 11:11 AM PST

The idea of solar panels circling Earth and beaming down power is gaining traction

The Impact of the Invisible

Posted: 25 Jan 2013 11:10 AM PST

Nanotechnology will shape society, but scientists and the public have a say in just how much.

IEEE Spectrum

Phreaking Out Ma Bell
Laser Eyes Spy a Big Melt in the Arctic
MeCam Is a $50 Camera-Equipped Autonomous Nano Quadrotor, Supposedly

Phreaking Out Ma Bell

Posted: 28 Jan 2013 08:34 AM PST

How a buccaneering young engineer built the little blue box that broke into the biggest network in the world

Laser Eyes Spy a Big Melt in the Arctic

Posted: 28 Jan 2013 08:00 AM PST

Airborne altimeters yield a disturbing picture of polar ice loss

MeCam Is a $50 Camera-Equipped Autonomous Nano Quadrotor, Supposedly

Posted: 28 Jan 2013 07:42 AM PST

This little quadrotor wants to follow you around, shooting videos on command. But is it real?

IEEE Spectrum

UK Attempts to Take a Leadership Role in the Commercialization of Graphene
The Librarian Of Congress Gets To Decide Whether Americans Can Unlock Their Phones. And He Says No.
This Week in Cybercrime: Student Expelled After Revealing Security Hole in College Computer System

UK Attempts to Take a Leadership Role in the Commercialization of Graphene

Posted: 25 Jan 2013 01:32 PM PST

A year of big ticket investments aimed at making the UK a graphene hub could be effective—or not

The Librarian Of Congress Gets To Decide Whether Americans Can Unlock Their Phones. And He Says No.

Posted: 25 Jan 2013 12:58 PM PST

Tomorrow it becomes illegal to unlock smartphones in the U.S.

This Week in Cybercrime: Student Expelled After Revealing Security Hole in College Computer System

Posted: 25 Jan 2013 11:45 AM PST

Plus: Logging into everything with a single password might be inviting trouble, the U.S. is on the lookout for automated cyberwarfare defense, and Google rewards hackers