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Chemists, engineers achieve world record with high-speed graphene transistors

Fri, 03 Sep 2010 18:13:47 +0000

Researchers have developed a new fabrication process for high-speed graphene transistors using a nanowire as the self-aligned gate. This new technique does not produce any appreciable defects in the graphene during fabrication, so the carrier mobility is retained. Also, by using a self-aligned approach with a nanowire as the gate, the group was able to overcome alignment difficulties previously encountered and fabricate short channel devices with unprecedented performance.

Posted on Thu, 02 Sep 2010 00:00:00 EDT at http://www.sciencedaily.com/releases/201...092509.htm

'Greening' your flat screen TV: Engineers develop an organic LED light source for home electronics, medicine and

Fri, 03 Sep 2010 18:13:47 +0000

An estimated 70 percent of heavy metals in US landfills come from discarded electronics, and as big screen TVs get less expensive, environmental costs continue to mount. To remedy this, researchers are applying organic nano-technology to "green" the optics and electronics industry. Their technology could make flat screen TV production more environmentally friendly and can even make medical devices more sensitive.

Posted on Fri, 27 Aug 2010 02:00:00 EDT at http://www.sciencedaily.com/releases/201...131554.htm

Plastic computer memory device that utilizes electron spin to read and write data: Alternative to traditional semiconduc

Fri, 03 Sep 2010 18:13:47 +0000

Researchers have demonstrated the first plastic computer memory device that utilizes the spin of electrons to read and write data. An alternative to traditional microelectronics, so-called "spintronics" could store more data in less space, process data faster, and consume less power.

Posted on Tue, 10 Aug 2010 14:00:00 EDT at http://www.sciencedaily.com/releases/201...171533.htm

Control your camera flash with a TV remote

Fri, 03 Sep 2010 18:13:47 +0000

This project shows how to remote control the power of a flash unit.

If you are handy with a soldering iron, though, you might want to take a look at Domjan Svilkovic’s instructions to control your flash settings with a TV remote control. He took a cheapo flash, and added a PICaxe microcontroller that waits for ‘volume up’ and ‘volume down’ signals, then activates a set of transistors on the remote to simulate button presses. Now, where did I put my flash units… [via]

Control your camera flash with a TV remote - [Link]

Posted on Fri, 03 Sep 2010 08:56:18 +0000 at http://www.electronics-lab.com/blog/?p=5457
Comments: http://www.electronics-lab.com/blog/?p=5457#comments

DC Motor Speed Control using Pulse Width Modulation (PWM)

Fri, 03 Sep 2010 18:13:47 +0000

Pulse Width Modulation is the most common way to control the speed of a DC motor. This project describes how to use the hardware PWM built inside PIC12F683 for motor speed control. The PIC12F683 reads analog voltage output of a potentiometer and accordingly changes the duty cycle of PWM wave to set the speed of the motor. Since the PWM duty cycle input is 8-bit and ADCs in PIC12F683 are 10 bits, only the 8 most significant bits from ADC output are used. This gives 256 different speed levels. The software is written in mikroC.

DC Motor Speed Control using Pulse Width Modulation (PWM) - [Link]

Posted on Fri, 03 Sep 2010 08:37:13 +0000 at http://www.electronics-lab.com/blog/?p=5453
Comments: http://www.electronics-lab.com/blog/?p=5453#comments

Game Console & Message Scrolling Display with 144 LEDs

Fri, 03 Sep 2010 18:13:47 +0000

A PIC16F877A microcontroller is used to design the project and is responsible for driving the display that consists of 144 LEDs arranged in three 18x8 matrices.

Plywood Based Bulbdial Clock

Fri, 03 Sep 2010 18:13:47 +0000

The project utilizes a 16MHz crystal oscillator and an ATmega168 microcontroller as the main parts in order to produce a modern Bulbdial clock.

'Greening' your flat screen TV: Engineers develop an organic LED light source for home electronics, medicine and

Fri, 03 Sep 2010 05:30:06 +0000

Plastic computer memory device that utilizes electron spin to read and write data: Alternative to traditional semiconduc

Fri, 03 Sep 2010 05:30:06 +0000

Solderless Construction of Minimalist Arduino

Fri, 03 Sep 2010 05:30:06 +0000

An Arduino clone is featured in this Minimalist Arduino with a design for use in permanent or custom circuits on solderless breadboards, stripboards, or custom PCBs.

BECOME a MODERATOR!

Thu, 02 Sep 2010 22:23:54 +0000

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Illuminatrix – led matrix with animations

Thu, 02 Sep 2010 22:21:03 +0000

This is a great project because it is a complete solution to run your own animations on Illuminatrix during Burining Man 2010. Project itself is pretty complex one that consists of 16 distinct PCBs built around PIC16F1827 on each that control 3 LED drivers for every color of RGB LEDs.

WPvideo 1.10

Download!

All these slave boards are controlled by master board run by PIC18F26J50 microcontroller that sends data via I2C interface. Animations are stored in SD card so animations are run one by one, or user can enter animation ID with PS/2 keyboard and view own animation. Well this is great stuff for shows.

Posted on Tue, 31 Aug 2010 19:11:04 +0000 at http://www.embedds.com/illuminatrix-led-...nimations/
Comments: http://www.embedds.com/illuminatrix-led-.../#comments

Simple PWM fan controller with temperature reading

Thu, 02 Sep 2010 22:21:03 +0000

This circuit does what the name says – it reads temperature of an object and then adjusts PWM signal that turns fan. So the hotter – the more intense cooling will be.

Controller is based on PIC12F675 microcontroller that reads temperature from LM35 temperature sensor via ADC channel. Then ADC value is converted to temperature. Fan controller can be used anywhere where cooling is needed. Mainly it will fit on a PC for cooling hard drives, or other gadgets.

Posted on Mon, 30 Aug 2010 18:50:55 +0000 at http://www.embedds.com/simple-pwm-fan-co...e-reading/
Comments: http://www.embedds.com/simple-pwm-fan-co.../#comments

Alarm clock with glass ringer

Thu, 02 Sep 2010 22:21:03 +0000

This is another analog clock solution as we’ve seen before. But this one has alarm functionality. Fun thing is how alarm is ringed. It uses a motor with two weights that hit the wine glass and this way makes a sound that will definitely wake you up.

Lock runs on legacy microcontroller AT90S2313 that can easily be replaced with ATtiny2313 with minor fuse changes. Clock also has a battery backup that will ensure that alarm will ring even if mains will be out.

Posted on Sun, 29 Aug 2010 18:43:00 +0000 at http://www.embedds.com/alarm-clock-with-glass-ringer/
Comments: http://www.embedds.com/alarm-clock-with-.../#comments

Car Headlight Alarm

Thu, 02 Sep 2010 22:21:03 +0000

This car headlight alarm circuit can be set for one or two functions:
First, to indicate that the head lights (or the side lights) should be switched off after switching off the ignition contact. With this circuit, there should be no dead battery due to headlights that were left on.
Second, to indicate that the head lights should be on once ignition contact is switched on.

Car Headlight Alarm Features:

Continuously repeated alarm tone for lights ON (may be disabled)
Repeated alarm tone for lights OUT
Only 3 wires are required for hook-up

Download the manual of Car Headlight Alarm here (you may buy the kit at electronickits.com with price of US$19.95)

Posted on Thu, 02 Sep 2010 02:50:12 +0000 at http://feedproxy.google.com/~r/Electroni...alarm.html
Comments: http://circuitdiagram.net/car-headlight-...l#comments