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Showing posts from January, 2012

Advantages Of Buying The Latest Electronic Gadgets

Can we think of life without our electronic gadgets and appliances? We may but then that will be a life devoid of the convenience that we are so used to normally. Electronic Gadgets and gizmos have changed the way we live, the way we interact and socialize and also the way we entertain ourselves. As we change the way we live, why shouldn't we change the way we shop and buy stuff? Physically going to a store downtown to get yourself a new electronic gadget can seem so contradictory. While we are arming ourselves with the latest gadgets to make life easier we are not making it easy to for us to get those gadgets. When you have the best of everything available online, from electronic gadgets to the latest appliances why would you still want to visit a physical store? What's there online? Everything, in fact more cool stuff than you could ever get running from store to store. It's a one stop shop for all your gadget needs. Here are some reasons why you should get your electr…

Transistor Amplification - Arduino Workshop Project Video #2

This is the 2nd video in the Arduino Workshop tutorials series in which I show how to properly use a transistor to amplify a digital output pin. This is a must when you have to drive high current devices from an arduino like high power led's and motors. Any questions or comments are welcome please post them

Arduino Breadboard Tutorial -Arduino Workshop Project Video #1

This is a tutorial about making an Arduino board on a breadboard! It is useful to be able to do this as its much cheaper once you have the infrastructure to use it (cables, tools ect...) and if it breaks a replacement isn't that expensive. This video is also the first of the arduino workshop projects in which I will make fun 30 minutes arduino projects. I spent a while making this video so I hope you enjoy it.

VEHICLE RELAYS - Operation & Diagnosis

If you've ever wondered what a relay is and how it works, this is the video you've been hoping for... Other information about the FET book is at

3D Stereo

The 3D Stereo circuit show in figure 1, Design for convert the signal form MONO to Stereo this circuit be compatible with Thunderbox .Tape Cassette, mini radio

 Data sheet & Related Links :
Data sheet 40534053 - ANALOG MULTIPLEXERS/ DEMULTIPLEXERS - Unisonic Technologies

DC Motor Speed Control

The system shown consists of the HA-2542, a small 12-Vdc motor, and a position encoder. During operation, the encoder causes a series of "constant-width" pulses to charge C1.
The integrated pulses develop a reference voltage, which is proportional to motor speed and is applied to the inverting input of HA-2542. The noninverting input is held at a constant voltage, which represents the desired motor speed. A difference between these two inputs will send a corrected

Data sheet & Related Links :

Data Sheet HA-254270MHz, High Slew Rate, High Output Current Operational Amplifier

CMOS 4047 Digital Clock Circuit

This circuit provides a digital square wave that can be viewed directly or used to drive other circuits. It used the CMOS 4047 Low-Power Monostable/Astable Multivibrator. As used in Tom Duncan's Adventures with Digital Electronic's Book, to drive CMOS Decade of 4-bit binary counters.

RC = 10M x 100nF = (10x106) x (100x10-9) = 1 Hz OscOut (Double Frequency of Q)
Q (Inverse of Q)
Q (Square Wave, Frequency RC Hz, 1:1 Mark:Space Ratio)
These 3 outputs can be viewed using an LED and 330R Resitor in series.
Cext |1 +--+ 14| VCC
Rext |2 13| OSC
RCext |3 12| RETRIG
/AST |4 4047 11| /Q
AST |5 10| Q
/TR |6 9| RST
GND |7 8| TR

ToothBrush with built-in Justin Bieber songs

I think many of our readers have encountered the problem of making their little son or daughter to brush their teeth. Even with the cutest and the coolest toothbrush and the sweetest toothpaste it’s still a hard work, sometimes almost impossible. But what if we give them a little award (depending on each child’s musical taste) every time they brush their teeth? The thing above is a regular toothbrush, with a secret weapon. At a press of the button it plays a Justin Bieber’s song for two minutes - which is the same amount of time that dentists recommend to brush your teeth. Not much of a choice though, it has only 2 of JB’s songs: U Smile and Baby. A trio of LR44 batteries will keep this puppy running and bring you the joy (or a torture) of hearing the Canadian crooner every time you (or somebody else) brush your teeth.

Scientists created a new form of graphene

A new form of graphene, the researchers created at the University of Texas at Austin, opens new perspectives in the cooling technology of semiconductor devices and electronic devices being 60% more efficient heat conductor than conventional. Development specialists from Austin worked in collaboration with colleagues from two American and one Chinese universities.

According to scientists, the new material is 60% more efficient conductor of heat than conventional graphene.

Graphene - a material consisting of a single layer of carbon, is very promising for microelectronics. In particular, because of its ability to conduct heat. Usually carbon consists of 98.9% of 12C isotope and 1.1% - is 13C isotope. Graphene created by the project participants is 99.99% 12C isotope. The measurements conducted by scientists have shown that the new material conducts heat better than any other material tested to date.

As stated, the development may have important implications for future semiconduct…

Scoche CellControll mobile phone blocker

Imagine yourself driving a car. Suddenly, you receive a text message or a phone call, but you can’t answer it. You know that you shouldn’t answer while driving, but that flashing indicator just can’t get out of your mind. It tempts you to answer. If you know what I’m talking about, the thing above is just for you.

The CellControl designed to block certain use of a mobile phone while you drive. The phone will receive any information sent by the operator but it won’t show up until you stop the car. The hardware part of the system plugs into the car’s OBD-II port and is online only when you move. The app part must be installed on your phone. Unfortunately, there is no app for iPhone and there is no information releasing one. The CellControl device sells for $ 129.95 and is available now.

Night security light

Description.  Here is a simple circuit switches on a light around 2 hours after midnight, the time at which most of the robberies taking place. This simple circuit is build around a CMOS IC 4060 to obtain the required timing. During day time the LDR has low resistance and keeps the pin 12 of the IC1 high, preventing the IC1 from oscillating. When it is dark the LDR resistance becomes high and the pin 12 of IC1 becomes low and the IC starts oscillating, which indicated by the flashing of LED D3.The values of the timing components R1, R2, C4 are so selected that the out put pin3 of IC1 goes high after 8 hours. That means the high output drives the triac to switch on the lamp around 2’O clock. At morning, the LDR resistance drops and the pin 12 of IC1 goes high and stops the oscillation, making the lamp OFF. The switch S1 can be used to manually ON the lamp. The capacitor C2 prevents false triggering. Circuit diagram with Parts list.

 Assemble the circuit on a good quality…

How to make a Rheostat

ComponentsThe components needed for the connection areFlashlight bulb and socket [1]Dry cell lantern battery/D-cell battery [2]Wire [About 15 to 17 inches and another one 2 inches]Spring [1]Wire Clippers [A pair]A typical spring can be obtained from a widow roll up. You can even get to buy one at a cheap rate.ProcedureConnect the two Dry cell lantern/D-cell batteries tail-to-tail, so that the positive polarity of one battery is connected to the negative polarity of the other.Using a wire cutter, cut the wire in equal lengths. One wire should be at least 8 centimetres long.Connect the wires onto the open ends of both the batteries.The end of one wire must be connected to the bulb socket with the bulb in it.Connect the second wire to one end of the long spring.Connect the free end of one wire to one terminal of the light socket.Connect the other free wire to one end of the spring.Take the two inch wire and connect it to the second terminal of bulb socket.Connect the other end of the …

Electromagnetic field sensor circuit

Electromagnetic field sensor circuit Notes.This is a very simple circuit that can be used to sense electromagnetic radiations. The circuit can even detect hidden wrings. A 1mH inductor is used for sensing the electric field. The electric field will induce a small voltage in the sensor inductor and this induced voltage is amplified by the opamp.The headphone connect at the output of the opamp will give an audio indication of the electric field. For example, the electric field around a mains transformer can be heard as a 50 Hz hum. The POT R4 can be used to adjust the gain of the amplifier. By keeping the sensor inductor near to a telephone line, you can even hear the telephone conversations.

Notes. Assemble the circuit on a general purpose PCB.The circuit can be powered from a 9V PP3 battery.It is better to have a radial type inductor for L1.The POT R4 can be used to adjust the gain.The switch S1 can be a slide type ON/OFF switch.The IC1 must be mounted on a holder.All electrolyt…

Brightness controller for low power lamps.

The circuit given here can be used to control the brightness of low power incandescent lamps. The circuit is based on IC NE555 which is wired as an astable multivibrator with variable duty cycle. The output of IC is connected to the base of transistor Q1.The Q1 drives the lamp. The duty cycle of the multivibrator can be varied by varying the POT R4.As a result, the brightness of the lamp varies according to the position of the POT R4.The same circuit can be also used for speed control of small DC motors.

The lamp L1 can be a 6V / 200 mA lamp.The switch S1 can be SPST ON/OFF switch.The IC1 must be mounted on a holder.The circuit can be wired on a good quality PCB or common board.

Selective timer alarm.

A timer circuit using IC 4060 is given here. The IC 4060 is a 14 stage binary counter with a built-in oscillator.R2, R7, C1 are the components that determine the frequency of the oscillator and the outputs will become high one after other and only one at a time. The last five outputs are only used here. The high pulses from the outputs are used to trigger the NE555 IC. Here NE555 is wired as a monostable multivibrator.

The buzzer will produce the alarm when the output of IC2 goes high. The duration of the alarm depends on the components C3 and R5.The duration can be adjusted by varying the value of C3.The alarm will automatically turn OFF after the predetermined time. The trigger pin of IC2 will be normally positive. When the Q1 is forward biased by the positive pulse at its base from IC1, the capacitor C2 becomes charged and reduces the voltage at trigger pin of IC2.This triggers the IC.When the capacitor is fully charged the pin 2 becomes again positive.
The m…

Get Cool Electronic Gadgets Before Others Do

You can see latest electronic products being sold in the market on a regular basis. It is wonderful for people who are gadget enthusiasts and like trying new items. There are some who want to buy the latest gadgets before anybody else buys it.
You can get a number of products for people of different lifestyles. Most manufacturers are redesigning and upgrading their products regularly attracts attention of people of all ages. You can get interested in gadgets which are smaller, smarter and more fun than earlier models and it can be tough to resist them.
In the present times it is quite simple to know about new products as soon as they are launched in the market. You can the latest information on gadgets in a number of websites and if you want to buy them before anybody else they are an excellent bet.

If you are seriously interested in buying latest gadgets, bookmark al the websites which offer these information. Keep checking them frequently to view the latest gadgets…

A simple solar panel regulator

When the panel isn't generating, the entire circuit is off and there is absolutely no current drain from the battery. When the sun gets up and panel starts producing at least 10 Volt, the LED lights and the two small transistors switch on. This powers the regulator circuit. As long as the battery voltage stays below 14V, the operational amplifier (which is a very low power device) will keep the MOSFET off, so nothing special will happen and the panel current will go through the Schottky diode to the battery.

 When the battery reaches the trigger voltage, which is nominally 14.0V, U1 switches on the MOSFET. This shorts out the solar panel (a condition that is perfectly safe), the battery no longer gets charging current, the LED goes off, the two small transistors go off, and C2 powers the regulator circuit while slowly discharging. After roughly 3 seconds, C2 has discharged enough to overcome the hysteresis of U1, which switches the MOSFET off again. Now the circuit will again char…

Red Alert Str trek Alarm Siren

Parts List:
R1,R4 = 10K C1 = 10uF/25V, electrolytic
R2 = 75K C2,C3,C4 = 0.01uF (10nF), ceramic
R3 = 1K C5 = 470uF/25V, electrolytic
R5 = 100K IC1,IC2 = 555 Timer/Oscillator
Q1 = 2N3055 D1,D3,D4 = 1N4001
LS = Loudspeaker, 8 ohm D2 = 1N4148

The circuit above provides a 'pulse-tone', like the one you know from the old Star Trek. The output stage contains a power-booster with Q1 (2N3055), providing several watts to the loudspeaker SPKR1.
Clamping diodes are used to limit the speaker's inductive kickback to a safe level. To prevent the output signal from feeding back into the 555's via the supply line, the supply lines are filtered by a capacitor and an isolating diode (C5 and D2).
This circuit acts as a pulsed-tone alarm-call generator. Integrated circuit U1 acts as an 800-Hz tone generator, and is gated on and off once per second by U2 via …

Temperature Controled Fan

This circuit controls very accurately a fan of any size. Just adjust the associated resistors for a different type like the R6 resistor of 100 ohm, 2 watt type and you're all set. The above circuit diagram is for a small 12 volt fan, the size and type determined by the user.

Temperature is sampled via the 1N4148 diodes and presented at pins 2 and 3 of the differential type 741 op-amp. R7 (10K) is used to create a voltage difference between the inverted and non-inverted input pins 2 and 3 of the 741. All signals presented at pin 2 will be inverted on the output pin 6. Obviously then, the input pins are very important. When pin 2 goes more positive than pin 3, the output pin 6 of the 741 goes high and forward biasing the base of transistor Q1, which switches on transistor Q2 and the Led and puts 12V on the output pins for the fan. R9 functions as a feedback for the 741. Only DC type fans can be used with this schematic diagram without further modifications.
The temperature sensor is…

Bluetooth handsets

When it comes to electronic gadgets, you would find that the technology of the Bluetooth handsets is one of the best. In fact amongst the other electronic gadgets of the similar nature, blue tooth is surely one of the best. The technology which is mostly used is the cell phone and almost every one today looks for a cooler and better version of the cell today. With the introduction of blue tooth, the importance of these cell phones has greatly enhanced. But then the this technology of blue tooth is not just confined to the cell phones, blue tooth is being increasing incorporated in other electronic gadgets like computers and gaming consoles.
Bluetooth headset is a much better version of the cell phones as they make an advanced accessory. Along, with the plantronics, amplified headsets, wireless headsets etc, this type of headset is a novelty. Today cell phones are used to be able to communicate with loved ones; on the other hand the blue tooth headsets allow to talk without even holdin…

Western Digital MyBook Thunderbolt Duo

Western Digital MyBook Thunderbolt Duo  eyes on 

6TB specs
Type Desktop hard drive Storage space 6 TB Drive type Platter Announced January 10, 2012
GeneralType Desktop hard drive Storage space 6 TB Drive type Platter Drive form factor 3.5 inches
ConnectionsThunderbolt 2 port(s) PowerPower source External
Pricing & availability
Availability Pre-release Announced (US) January 10, 2012

at Macworld 2012, Western Digital demoed a preview of their essentially finished, yet not final, MyBook Thunderbolt Duo. Scheduled to ship in Q1 for a…

SanDisk's 128GB SD card

It's flash card season at CES (especially given the shutterbug boost by the conjoined Photo Marketing Association show), and SanDisk has a contribution with high-capacity mid-range SDXC cards.

The two SanDisk Extreme models, 64GB and 128GB, can transfer data at 45MBps. That's less than half the speed of the company's top-end Extreme Pro line of SD cards at 95MBps, but it should be good enough for many photographers and videographers.
The high capacity comes with a price premium--prices for the cards are $200 and $400--but could be useful for those shooting lots of video or traveling away from a computer. And if you're shooting raw photos--my camera's weigh in at 30MB apiece, typically--this card will hold more than 4,000 still images.
The cards are available now, SanDisk said (flying in the face of the CES vaporware trend).
The cards, with the UHS-I interface, are up to the chore of capturing 3D video in high-definition 1080p video, Sandisk said.
Also at CES, …

amoled oled display

More tablets, PCs, and TVs to adopt AMOLED displays
AMOLED (active matrix organic light emitting diode) displays are ideal for tablets and TVs as they offer high contrast ratios, quick response times, and wide viewing angles. The technology also allows for such devices to be thin, flexible, and even transparent, the research firm notes.
On the other hand, AMOLED technology has faced challenges scaling up to screen sizes much larger than those on smartphones. But the latest improvements in the technology are expected to pave the way for its use on bigger devices, though production can still carry a high price tag.
"OLED displays operate through direct emission, as opposed to transmissive LCD or reflective displays, which enables area lighting," Jennifer Colegrove, vice president of emerging display technologies for NPD DisplaySearch, said in a statement. "The technology has made good progress and is ready to enter large-size applications, but low cost manufacturing for larg…

windows 8 news

Windows 8 will refresh your PC without losing your data

(Credit: Microsoft)

Windows 8 will provide a refresh option that can automatically restore your PC to a clean state without losing all your data and customized settings.
Due to appear in the Windows 8 beta that will debut next month, the refresh option makes good on Microsoft's earlier promise that it would give users an easy way to restore Windows in the event of a problem.
As described in yesterday's Building Windows 8 blog by Desmond Lee, a program manager on Microsoft Fundamentals team, the new OS will actually offer two ways to bring Windows back to factory condition.
1 - The refresh option will keep all personal data, important settings, and Metro style apps, and then reinstall Windows.
2 - The reset option will securely remove all data, settings, and applications, and then reinstall Windows.
Refreshing Windows would typically be the first option to try if the OS isn't behaving properly. And it's one that Microsoft…